basic/packcc-gv-plain/gvplain.c

/* A packrat parser generated by PackCC 1.5.0 */

#ifdef _MSC_VER
#undef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif /* _MSC_VER */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifndef _MSC_VER
#if defined __GNUC__ && defined _WIN32 /* MinGW */
#ifndef PCC_USE_SYSTEM_STRNLEN
#define strnlen(str, maxlen) pcc_strnlen(str, maxlen)
static size_t pcc_strnlen(const char *str, size_t maxlen) {
    size_t i;
    for (i = 0; i < maxlen && str[i]; i++);
    return i;
}
#endif /* !PCC_USE_SYSTEM_STRNLEN */
#endif /* defined __GNUC__ && defined _WIN32 */
#endif /* !_MSC_VER */

#define PCC_DBG_EVALUATE 0
#define PCC_DBG_MATCH    1
#define PCC_DBG_NOMATCH  2

#include "gvplain.h"


#include <stdio.h>

static const char *dbg_str[] = { "Evaluating rule", "Matched rule", "Abandoning rule" };

#define PCC_DEBUG(event, rule, level, pos, buffer, length) \
    fprintf(stdout, "%*s%s %s @%d [%.*s]\n", (int)(level * 2), "", dbg_str[event], rule, (int)pos, (int)length,  buffer); fflush(stdout)

    /* NOTE: To guarantee the output order, stderr, which can lead a race condition with stdout, is not used. */

#ifndef PCC_BUFFERSIZE
#define PCC_BUFFERSIZE 256
#endif /* !PCC_BUFFERSIZE */

#ifndef PCC_ARRAYSIZE
#define PCC_ARRAYSIZE 2
#endif /* !PCC_ARRAYSIZE */

#define VOID_VALUE (~(size_t)0)

typedef enum pcc_bool_tag {
    PCC_FALSE = 0,
    PCC_TRUE
} pcc_bool_t;

typedef struct pcc_char_array_tag {
    char *buf;
    size_t max;
    size_t len;
} pcc_char_array_t;

typedef struct pcc_range_tag {
    size_t start;
    size_t end;
} pcc_range_t;

typedef int pcc_value_t;

typedef void *pcc_auxil_t;

typedef struct pcc_value_table_tag {
    pcc_value_t *buf;
    size_t max;
    size_t len;
} pcc_value_table_t;

typedef struct pcc_value_refer_table_tag {
    pcc_value_t **buf;
    size_t max;
    size_t len;
} pcc_value_refer_table_t;

typedef struct pcc_capture_tag {
    pcc_range_t range;
    char *string; /* mutable */
} pcc_capture_t;

typedef struct pcc_capture_table_tag {
    pcc_capture_t *buf;
    size_t max;
    size_t len;
} pcc_capture_table_t;

typedef struct pcc_capture_const_table_tag {
    const pcc_capture_t **buf;
    size_t max;
    size_t len;
} pcc_capture_const_table_t;

typedef struct pcc_thunk_tag pcc_thunk_t;
typedef struct pcc_thunk_array_tag pcc_thunk_array_t;

typedef void (*pcc_action_t)(gvplain_context_t *, pcc_thunk_t *, pcc_value_t *);

typedef enum pcc_thunk_type_tag {
    PCC_THUNK_LEAF,
    PCC_THUNK_NODE
} pcc_thunk_type_t;

typedef struct pcc_thunk_leaf_tag {
    pcc_value_refer_table_t values;
    pcc_capture_const_table_t capts;
    pcc_capture_t capt0;
    pcc_action_t action;
} pcc_thunk_leaf_t;

typedef struct pcc_thunk_node_tag {
    const pcc_thunk_array_t *thunks; /* just a reference */
    pcc_value_t *value; /* just a reference */
} pcc_thunk_node_t;

typedef union pcc_thunk_data_tag {
    pcc_thunk_leaf_t leaf;
    pcc_thunk_node_t node;
} pcc_thunk_data_t;

struct pcc_thunk_tag {
    pcc_thunk_type_t type;
    pcc_thunk_data_t data;
};

struct pcc_thunk_array_tag {
    pcc_thunk_t **buf;
    size_t max;
    size_t len;
};

typedef struct pcc_thunk_chunk_tag {
    pcc_value_table_t values;
    pcc_capture_table_t capts;
    pcc_thunk_array_t thunks;
    size_t pos; /* the starting position in the character buffer */
} pcc_thunk_chunk_t;

typedef struct pcc_lr_entry_tag pcc_lr_entry_t;

typedef enum pcc_lr_answer_type_tag {
    PCC_LR_ANSWER_LR,
    PCC_LR_ANSWER_CHUNK
} pcc_lr_answer_type_t;

typedef union pcc_lr_answer_data_tag {
    pcc_lr_entry_t *lr;
    pcc_thunk_chunk_t *chunk;
} pcc_lr_answer_data_t;

typedef struct pcc_lr_answer_tag pcc_lr_answer_t;

struct pcc_lr_answer_tag {
    pcc_lr_answer_type_t type;
    pcc_lr_answer_data_t data;
    size_t pos; /* the absolute position in the input */
    pcc_lr_answer_t *hold;
};

typedef pcc_thunk_chunk_t *(*pcc_rule_t)(gvplain_context_t *);

typedef struct pcc_rule_set_tag {
    pcc_rule_t *buf;
    size_t max;
    size_t len;
} pcc_rule_set_t;

typedef struct pcc_lr_head_tag pcc_lr_head_t;

struct pcc_lr_head_tag {
    pcc_rule_t rule;
    pcc_rule_set_t invol;
    pcc_rule_set_t eval;
    pcc_lr_head_t *hold;
};

typedef struct pcc_lr_memo_tag {
    pcc_rule_t rule;
    pcc_lr_answer_t *answer;
} pcc_lr_memo_t;

typedef struct pcc_lr_memo_map_tag {
    pcc_lr_memo_t *buf;
    size_t max;
    size_t len;
} pcc_lr_memo_map_t;

typedef struct pcc_lr_table_entry_tag {
    pcc_lr_head_t *head; /* just a reference */
    pcc_lr_memo_map_t memos;
    pcc_lr_answer_t *hold_a;
    pcc_lr_head_t *hold_h;
} pcc_lr_table_entry_t;

typedef struct pcc_lr_table_tag {
    pcc_lr_table_entry_t **buf;
    size_t max;
    size_t len;
} pcc_lr_table_t;

struct pcc_lr_entry_tag {
    pcc_rule_t rule;
    pcc_thunk_chunk_t *seed; /* just a reference */
    pcc_lr_head_t *head; /* just a reference */
};

typedef struct pcc_lr_stack_tag {
    pcc_lr_entry_t **buf;
    size_t max;
    size_t len;
} pcc_lr_stack_t;

struct gvplain_context_tag {
    size_t pos; /* the position in the input of the first character currently buffered */
    size_t cur; /* the current parsing position in the character buffer */
    size_t level;
    pcc_char_array_t buffer;
    pcc_lr_table_t lrtable;
    pcc_lr_stack_t lrstack;
    pcc_auxil_t auxil;
};

#ifndef PCC_ERROR
#define PCC_ERROR(auxil) pcc_error()
static void pcc_error(void) {
    fprintf(stderr, "Syntax error\n");
    exit(1);
}
#endif /* !PCC_ERROR */

#ifndef PCC_GETCHAR
#define PCC_GETCHAR(auxil) getchar()
#endif /* !PCC_GETCHAR */

#ifndef PCC_MALLOC
#define PCC_MALLOC(auxil, size) pcc_malloc_e(size)
static void *pcc_malloc_e(size_t size) {
    void *const p = malloc(size);
    if (p == NULL) {
        fprintf(stderr, "Out of memory\n");
        exit(1);
    }
    return p;
}
#endif /* !PCC_MALLOC */

#ifndef PCC_REALLOC
#define PCC_REALLOC(auxil, ptr, size) pcc_realloc_e(ptr, size)
static void *pcc_realloc_e(void *ptr, size_t size) {
    void *const p = realloc(ptr, size);
    if (p == NULL) {
        fprintf(stderr, "Out of memory\n");
        exit(1);
    }
    return p;
}
#endif /* !PCC_REALLOC */

#ifndef PCC_FREE
#define PCC_FREE(auxil, ptr) free(ptr)
#endif /* !PCC_FREE */

#ifndef PCC_DEBUG
#define PCC_DEBUG(event, rule, level, pos, buffer, length) ((void)0)
#endif /* !PCC_DEBUG */

static char *pcc_strndup_e(pcc_auxil_t auxil, const char *str, size_t len) {
    const size_t m = strnlen(str, len);
    char *const s = (char *)PCC_MALLOC(auxil, m + 1);
    if (auxil) { }
    memcpy(s, str, m);
    s[m] = '\0';
    return s;
}

static void pcc_char_array__init(pcc_auxil_t auxil, pcc_char_array_t *array, size_t max) {
    array->len = 0;
    array->max = max;
    if (auxil) { }
    array->buf = (char *)PCC_MALLOC(auxil, array->max);
}

static void pcc_char_array__add(pcc_auxil_t auxil, pcc_char_array_t *array, char ch) {
    if (array->max <= array->len) {
        const size_t n = array->len + 1;
        size_t m = array->max;
        if (m == 0) m = 1;
        while (m < n && m != 0) m <<= 1;
        if (m == 0) m = n;
        if (auxil) { }
        array->buf = (char *)PCC_REALLOC(auxil, array->buf, m);
        array->max = m;
    }
    array->buf[array->len++] = ch;
}

static void pcc_char_array__term(pcc_auxil_t auxil, pcc_char_array_t *array) {
    PCC_FREE(auxil, array->buf);
}

static void pcc_value_table__init(pcc_auxil_t auxil, pcc_value_table_t *table, size_t max) {
    table->len = 0;
    table->max = max;
    table->buf = (pcc_value_t *)PCC_MALLOC(auxil, sizeof(pcc_value_t) * table->max);
    if (auxil) { }
    return;
}

static void pcc_value_table__resize(pcc_auxil_t auxil, pcc_value_table_t *table, size_t len) {
    if (table->max < len) {
        size_t m = table->max;
        if (m == 0) m = 1;
        while (m < len && m != 0) m <<= 1;
        if (m == 0) m = len;
        table->buf = (pcc_value_t *)PCC_REALLOC(auxil, table->buf, sizeof(pcc_value_t) * m);
        table->max = m;
    }
    table->len = len;
}

static void pcc_value_table__term(pcc_auxil_t auxil, pcc_value_table_t *table) {
    PCC_FREE(auxil, table->buf);
}

static void pcc_value_refer_table__init(pcc_auxil_t auxil, pcc_value_refer_table_t *table, size_t max) {
    table->len = 0;
    table->max = max;
    table->buf = (pcc_value_t **)PCC_MALLOC(auxil, sizeof(pcc_value_t *) * table->max);
}

static void pcc_value_refer_table__resize(pcc_auxil_t auxil, pcc_value_refer_table_t *table, size_t len) {
    size_t i;
    if (table->max < len) {
        size_t m = table->max;
        if (m == 0) m = 1;
        while (m < len && m != 0) m <<= 1;
        if (m == 0) m = len;
        table->buf = (pcc_value_t **)PCC_REALLOC(auxil, table->buf, sizeof(pcc_value_t *) * m);
        table->max = m;
    }
    for (i = table->len; i < len; i++) table->buf[i] = NULL;
    table->len = len;
}

static void pcc_value_refer_table__term(pcc_auxil_t auxil, pcc_value_refer_table_t *table) {
    PCC_FREE(auxil, table->buf);
}

static void pcc_capture_table__init(pcc_auxil_t auxil, pcc_capture_table_t *table, size_t max) {
    table->len = 0;
    table->max = max;
    table->buf = (pcc_capture_t *)PCC_MALLOC(auxil, sizeof(pcc_capture_t) * table->max);
}

static void pcc_capture_table__resize(pcc_auxil_t auxil, pcc_capture_table_t *table, size_t len) {
    size_t i;
    for (i = len; i < table->len; i++) PCC_FREE(auxil, table->buf[i].string);
    if (table->max < len) {
        size_t m = table->max;
        if (m == 0) m = 1;
        while (m < len && m != 0) m <<= 1;
        if (m == 0) m = len;
        table->buf = (pcc_capture_t *)PCC_REALLOC(auxil, table->buf, sizeof(pcc_capture_t) * m);
        table->max = m;
    }
    for (i = table->len; i < len; i++) {
        table->buf[i].range.start = 0;
        table->buf[i].range.end = 0;
        table->buf[i].string = NULL;
    }
    table->len = len;
}

static void pcc_capture_table__term(pcc_auxil_t auxil, pcc_capture_table_t *table) {
    while (table->len > 0) {
        table->len--;
        PCC_FREE(auxil, table->buf[table->len].string);
    }
    PCC_FREE(auxil, table->buf);
}

static void pcc_capture_const_table__init(pcc_auxil_t auxil, pcc_capture_const_table_t *table, size_t max) {
    table->len = 0;
    table->max = max;
    table->buf = (const pcc_capture_t **)PCC_MALLOC(auxil, sizeof(const pcc_capture_t *) * table->max);
}

static void pcc_capture_const_table__resize(pcc_auxil_t auxil, pcc_capture_const_table_t *table, size_t len) {
    size_t i;
    if (table->max < len) {
        size_t m = table->max;
        if (m == 0) m = 1;
        while (m < len && m != 0) m <<= 1;
        if (m == 0) m = len;
        table->buf = (const pcc_capture_t **)PCC_REALLOC(auxil, (pcc_capture_t **)table->buf, sizeof(const pcc_capture_t *) * m);
        table->max = m;
    }
    for (i = table->len; i < len; i++) table->buf[i] = NULL;
    table->len = len;
}

static void pcc_capture_const_table__term(pcc_auxil_t auxil, pcc_capture_const_table_t *table) {
    PCC_FREE(auxil, table->buf);
}

static pcc_thunk_t *pcc_thunk__create_leaf(pcc_auxil_t auxil, pcc_action_t action, size_t valuec, size_t captc) {
    pcc_thunk_t *const thunk = (pcc_thunk_t *)PCC_MALLOC(auxil, sizeof(pcc_thunk_t));
    thunk->type = PCC_THUNK_LEAF;
    pcc_value_refer_table__init(auxil, &thunk->data.leaf.values, valuec);
    pcc_value_refer_table__resize(auxil, &thunk->data.leaf.values, valuec);
    pcc_capture_const_table__init(auxil, &thunk->data.leaf.capts, captc);
    pcc_capture_const_table__resize(auxil, &thunk->data.leaf.capts, captc);
    thunk->data.leaf.capt0.range.start = 0;
    thunk->data.leaf.capt0.range.end = 0;
    thunk->data.leaf.capt0.string = NULL;
    thunk->data.leaf.action = action;
    return thunk;
}

static pcc_thunk_t *pcc_thunk__create_node(pcc_auxil_t auxil, const pcc_thunk_array_t *thunks, pcc_value_t *value) {
    pcc_thunk_t *const thunk = (pcc_thunk_t *)PCC_MALLOC(auxil, sizeof(pcc_thunk_t));
    thunk->type = PCC_THUNK_NODE;
    thunk->data.node.thunks = thunks;
    thunk->data.node.value = value;
    return thunk;
}

static void pcc_thunk__destroy(pcc_auxil_t auxil, pcc_thunk_t *thunk) {
    if (thunk == NULL) return;
    switch (thunk->type) {
    case PCC_THUNK_LEAF:
        PCC_FREE(auxil, thunk->data.leaf.capt0.string);
        pcc_capture_const_table__term(auxil, &thunk->data.leaf.capts);
        pcc_value_refer_table__term(auxil, &thunk->data.leaf.values);
        break;
    case PCC_THUNK_NODE:
        break;
    default: /* unknown */
        break;
    }
    PCC_FREE(auxil, thunk);
}

static void pcc_thunk_array__init(pcc_auxil_t auxil, pcc_thunk_array_t *array, size_t max) {
    array->len = 0;
    array->max = max;
    array->buf = (pcc_thunk_t **)PCC_MALLOC(auxil, sizeof(pcc_thunk_t *) * array->max);
}

static void pcc_thunk_array__add(pcc_auxil_t auxil, pcc_thunk_array_t *array, pcc_thunk_t *thunk) {
    if (array->max <= array->len) {
        const size_t n = array->len + 1;
        size_t m = array->max;
        if (m == 0) m = 1;
        while (m < n && m != 0) m <<= 1;
        if (m == 0) m = n;
        array->buf = (pcc_thunk_t **)PCC_REALLOC(auxil, array->buf, sizeof(pcc_thunk_t *) * m);
        array->max = m;
    }
    array->buf[array->len++] = thunk;
}

static void pcc_thunk_array__revert(pcc_auxil_t auxil, pcc_thunk_array_t *array, size_t len) {
    while (array->len > len) {
        array->len--;
        pcc_thunk__destroy(auxil, array->buf[array->len]);
    }
}

static void pcc_thunk_array__term(pcc_auxil_t auxil, pcc_thunk_array_t *array) {
    while (array->len > 0) {
        array->len--;
        pcc_thunk__destroy(auxil, array->buf[array->len]);
    }
    PCC_FREE(auxil, array->buf);
}

static pcc_thunk_chunk_t *pcc_thunk_chunk__create(pcc_auxil_t auxil) {
    pcc_thunk_chunk_t *const chunk = (pcc_thunk_chunk_t *)PCC_MALLOC(auxil, sizeof(pcc_thunk_chunk_t));
    pcc_value_table__init(auxil, &chunk->values, PCC_ARRAYSIZE);
    pcc_capture_table__init(auxil, &chunk->capts, PCC_ARRAYSIZE);
    pcc_thunk_array__init(auxil, &chunk->thunks, PCC_ARRAYSIZE);
    chunk->pos = 0;
    return chunk;
}

static void pcc_thunk_chunk__destroy(pcc_auxil_t auxil, pcc_thunk_chunk_t *chunk) {
    if (chunk == NULL) return;
    pcc_thunk_array__term(auxil, &chunk->thunks);
    pcc_capture_table__term(auxil, &chunk->capts);
    pcc_value_table__term(auxil, &chunk->values);
    PCC_FREE(auxil, chunk);
}

static void pcc_rule_set__init(pcc_auxil_t auxil, pcc_rule_set_t *set, size_t max) {
    set->len = 0;
    set->max = max;
    set->buf = (pcc_rule_t *)PCC_MALLOC(auxil, sizeof(pcc_rule_t) * set->max);
}

static size_t pcc_rule_set__index(pcc_auxil_t auxil, const pcc_rule_set_t *set, pcc_rule_t rule) {
    size_t i;
    for (i = 0; i < set->len; i++) {
        if (set->buf[i] == rule) return i;
    }
    return VOID_VALUE;
}

static pcc_bool_t pcc_rule_set__add(pcc_auxil_t auxil, pcc_rule_set_t *set, pcc_rule_t rule) {
    const size_t i = pcc_rule_set__index(auxil, set, rule);
    if (i != VOID_VALUE) return PCC_FALSE;
    if (set->max <= set->len) {
        const size_t n = set->len + 1;
        size_t m = set->max;
        if (m == 0) m = 1;
        while (m < n && m != 0) m <<= 1;
        if (m == 0) m = n;
        set->buf = (pcc_rule_t *)PCC_REALLOC(auxil, set->buf, sizeof(pcc_rule_t) * m);
        set->max = m;
    }
    set->buf[set->len++] = rule;
    return PCC_TRUE;
}

static pcc_bool_t pcc_rule_set__remove(pcc_auxil_t auxil, pcc_rule_set_t *set, pcc_rule_t rule) {
    const size_t i = pcc_rule_set__index(auxil, set, rule);
    if (i == VOID_VALUE) return PCC_FALSE;
    memmove(set->buf + i, set->buf + (i + 1), sizeof(pcc_rule_t) * (set->len - (i + 1)));
    return PCC_TRUE;
}

static void pcc_rule_set__clear(pcc_auxil_t auxil, pcc_rule_set_t *set) {
    set->len = 0;
}

static void pcc_rule_set__copy(pcc_auxil_t auxil, pcc_rule_set_t *set, const pcc_rule_set_t *src) {
    size_t i;
    pcc_rule_set__clear(auxil, set);
    for (i = 0; i < src->len; i++) {
        pcc_rule_set__add(auxil, set, src->buf[i]);
    }
}

static void pcc_rule_set__term(pcc_auxil_t auxil, pcc_rule_set_t *set) {
    PCC_FREE(auxil, set->buf);
}

static pcc_lr_head_t *pcc_lr_head__create(pcc_auxil_t auxil, pcc_rule_t rule) {
    pcc_lr_head_t *const head = (pcc_lr_head_t *)PCC_MALLOC(auxil, sizeof(pcc_lr_head_t));
    head->rule = rule;
    pcc_rule_set__init(auxil, &head->invol, PCC_ARRAYSIZE);
    pcc_rule_set__init(auxil, &head->eval, PCC_ARRAYSIZE);
    head->hold = NULL;
    return head;
}

static void pcc_lr_head__destroy(pcc_auxil_t auxil, pcc_lr_head_t *head) {
    if (head == NULL) return;
    pcc_lr_head__destroy(auxil, head->hold);
    pcc_rule_set__term(auxil, &head->eval);
    pcc_rule_set__term(auxil, &head->invol);
    PCC_FREE(auxil, head);
}

static void pcc_lr_entry__destroy(pcc_auxil_t auxil, pcc_lr_entry_t *lr);

static pcc_lr_answer_t *pcc_lr_answer__create(pcc_auxil_t auxil, pcc_lr_answer_type_t type, size_t pos) {
    pcc_lr_answer_t *answer = (pcc_lr_answer_t *)PCC_MALLOC(auxil, sizeof(pcc_lr_answer_t));
    answer->type = type;
    answer->pos = pos;
    answer->hold = NULL;
    switch (answer->type) {
    case PCC_LR_ANSWER_LR:
        answer->data.lr = NULL;
        break;
    case PCC_LR_ANSWER_CHUNK:
        answer->data.chunk = NULL;
        break;
    default: /* unknown */
        PCC_FREE(auxil, answer);
        answer = NULL;
    }
    return answer;
}

static void pcc_lr_answer__set_chunk(pcc_auxil_t auxil, pcc_lr_answer_t *answer, pcc_thunk_chunk_t *chunk) {
    pcc_lr_answer_t *const a = pcc_lr_answer__create(auxil, answer->type, answer->pos);
    switch (answer->type) {
    case PCC_LR_ANSWER_LR:
        a->data.lr = answer->data.lr;
        break;
    case PCC_LR_ANSWER_CHUNK:
        a->data.chunk = answer->data.chunk;
        break;
    default: /* unknown */
        break;
    }
    a->hold = answer->hold;
    answer->hold = a;
    answer->type = PCC_LR_ANSWER_CHUNK;
    answer->data.chunk = chunk;
}

static void pcc_lr_answer__destroy(pcc_auxil_t auxil, pcc_lr_answer_t *answer) {
    if (answer == NULL) return;
    pcc_lr_answer__destroy(auxil, answer->hold);
    switch (answer->type) {
    case PCC_LR_ANSWER_LR:
        pcc_lr_entry__destroy(auxil, answer->data.lr);
        break;
    case PCC_LR_ANSWER_CHUNK:
        pcc_thunk_chunk__destroy(auxil, answer->data.chunk);
        break;
    default: /* unknown */
        break;
    }
    PCC_FREE(auxil, answer);
}

static void pcc_lr_memo_map__init(pcc_auxil_t auxil, pcc_lr_memo_map_t *map, size_t max) {
    map->len = 0;
    map->max = max;
    map->buf = (pcc_lr_memo_t *)PCC_MALLOC(auxil, sizeof(pcc_lr_memo_t) * map->max);
}

static size_t pcc_lr_memo_map__index(pcc_auxil_t auxil, pcc_lr_memo_map_t *map, pcc_rule_t rule) {
    size_t i;
    for (i = 0; i < map->len; i++) {
        if (map->buf[i].rule == rule) return i;
    }
    return VOID_VALUE;
}

static void pcc_lr_memo_map__put(pcc_auxil_t auxil, pcc_lr_memo_map_t *map, pcc_rule_t rule, pcc_lr_answer_t *answer) {
    const size_t i = pcc_lr_memo_map__index(auxil, map, rule);
    if (i != VOID_VALUE) {
        pcc_lr_answer__destroy(auxil, map->buf[i].answer);
        map->buf[i].answer = answer;
    }
    else {
        if (map->max <= map->len) {
            const size_t n = map->len + 1;
            size_t m = map->max;
            if (m == 0) m = 1;
            while (m < n && m != 0) m <<= 1;
            if (m == 0) m = n;
            map->buf = (pcc_lr_memo_t *)PCC_REALLOC(auxil, map->buf, sizeof(pcc_lr_memo_t) * m);
            map->max = m;
        }
        map->buf[map->len].rule = rule;
        map->buf[map->len].answer = answer;
        map->len++;
    }
}

static pcc_lr_answer_t *pcc_lr_memo_map__get(pcc_auxil_t auxil, pcc_lr_memo_map_t *map, pcc_rule_t rule) {
    const size_t i = pcc_lr_memo_map__index(auxil, map, rule);
    return (i != VOID_VALUE) ? map->buf[i].answer : NULL;
}

static void pcc_lr_memo_map__term(pcc_auxil_t auxil, pcc_lr_memo_map_t *map) {
    while (map->len > 0) {
        map->len--;
        pcc_lr_answer__destroy(auxil, map->buf[map->len].answer);
    }
    PCC_FREE(auxil, map->buf);
}

static pcc_lr_table_entry_t *pcc_lr_table_entry__create(pcc_auxil_t auxil) {
    pcc_lr_table_entry_t *const entry = (pcc_lr_table_entry_t *)PCC_MALLOC(auxil, sizeof(pcc_lr_table_entry_t));
    entry->head = NULL;
    pcc_lr_memo_map__init(auxil, &entry->memos, PCC_ARRAYSIZE);
    entry->hold_a = NULL;
    entry->hold_h = NULL;
    return entry;
}

static void pcc_lr_table_entry__destroy(pcc_auxil_t auxil, pcc_lr_table_entry_t *entry) {
    if (entry == NULL) return;
    pcc_lr_head__destroy(auxil, entry->hold_h);
    pcc_lr_answer__destroy(auxil, entry->hold_a);
    pcc_lr_memo_map__term(auxil, &entry->memos);
    PCC_FREE(auxil, entry);
}

static void pcc_lr_table__init(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t max) {
    table->len = 0;
    table->max = max;
    table->buf = (pcc_lr_table_entry_t **)PCC_MALLOC(auxil, sizeof(pcc_lr_table_entry_t *) * table->max);
}

static void pcc_lr_table__resize(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t len) {
    size_t i;
    for (i = len; i < table->len; i++) pcc_lr_table_entry__destroy(auxil, table->buf[i]);
    if (table->max < len) {
        size_t m = table->max;
        if (m == 0) m = 1;
        while (m < len && m != 0) m <<= 1;
        if (m == 0) m = len;
        table->buf = (pcc_lr_table_entry_t **)PCC_REALLOC(auxil, table->buf, sizeof(pcc_lr_table_entry_t *) * m);
        table->max = m;
    }
    for (i = table->len; i < len; i++) table->buf[i] = NULL;
    table->len = len;
}

static void pcc_lr_table__set_head(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t index, pcc_lr_head_t *head) {
    if (index >= table->len) pcc_lr_table__resize(auxil, table, index + 1);
    if (table->buf[index] == NULL) table->buf[index] = pcc_lr_table_entry__create(auxil);
    table->buf[index]->head = head;
}

static void pcc_lr_table__hold_head(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t index, pcc_lr_head_t *head) {
    if (index >= table->len) pcc_lr_table__resize(auxil, table, index + 1);
    if (table->buf[index] == NULL) table->buf[index] = pcc_lr_table_entry__create(auxil);
    head->hold = table->buf[index]->hold_h;
    table->buf[index]->hold_h = head;
}

static void pcc_lr_table__set_answer(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t index, pcc_rule_t rule, pcc_lr_answer_t *answer) {
    if (index >= table->len) pcc_lr_table__resize(auxil, table, index + 1);
    if (table->buf[index] == NULL) table->buf[index] = pcc_lr_table_entry__create(auxil);
    pcc_lr_memo_map__put(auxil, &table->buf[index]->memos, rule, answer);
}

static void pcc_lr_table__hold_answer(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t index, pcc_lr_answer_t *answer) {
    if (index >= table->len) pcc_lr_table__resize(auxil, table, index + 1);
    if (table->buf[index] == NULL) table->buf[index] = pcc_lr_table_entry__create(auxil);
    answer->hold = table->buf[index]->hold_a;
    table->buf[index]->hold_a = answer;
}

static pcc_lr_head_t *pcc_lr_table__get_head(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t index) {
    if (index >= table->len || table->buf[index] == NULL) return NULL;
    return table->buf[index]->head;
}

static pcc_lr_answer_t *pcc_lr_table__get_answer(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t index, pcc_rule_t rule) {
    if (index >= table->len || table->buf[index] == NULL) return NULL;
    return pcc_lr_memo_map__get(auxil, &table->buf[index]->memos, rule);
}

static void pcc_lr_table__shift(pcc_auxil_t auxil, pcc_lr_table_t *table, size_t count) {
    size_t i;
    if (count > table->len) count = table->len;
    for (i = 0; i < count; i++) pcc_lr_table_entry__destroy(auxil, table->buf[i]);
    memmove(table->buf, table->buf + count, sizeof(pcc_lr_table_entry_t *) * (table->len - count));
    table->len -= count;
}

static void pcc_lr_table__term(pcc_auxil_t auxil, pcc_lr_table_t *table) {
    while (table->len > 0) {
        table->len--;
        pcc_lr_table_entry__destroy(auxil, table->buf[table->len]);
    }
    PCC_FREE(auxil, table->buf);
}

static pcc_lr_entry_t *pcc_lr_entry__create(pcc_auxil_t auxil, pcc_rule_t rule) {
    pcc_lr_entry_t *const lr = (pcc_lr_entry_t *)PCC_MALLOC(auxil, sizeof(pcc_lr_entry_t));
    lr->rule = rule;
    lr->seed = NULL;
    lr->head = NULL;
    return lr;
}

static void pcc_lr_entry__destroy(pcc_auxil_t auxil, pcc_lr_entry_t *lr) {
    PCC_FREE(auxil, lr);
}

static void pcc_lr_stack__init(pcc_auxil_t auxil, pcc_lr_stack_t *stack, size_t max) {
    stack->len = 0;
    stack->max = max;
    stack->buf = (pcc_lr_entry_t **)PCC_MALLOC(auxil, sizeof(pcc_lr_entry_t *) * stack->max);
}

static void pcc_lr_stack__push(pcc_auxil_t auxil, pcc_lr_stack_t *stack, pcc_lr_entry_t *lr) {
    if (stack->max <= stack->len) {
        const size_t n = stack->len + 1;
        size_t m = stack->max;
        if (m == 0) m = 1;
        while (m < n && m != 0) m <<= 1;
        if (m == 0) m = n;
        stack->buf = (pcc_lr_entry_t **)PCC_REALLOC(auxil, stack->buf, sizeof(pcc_lr_entry_t *) * m);
        stack->max = m;
    }
    stack->buf[stack->len++] = lr;
}

static pcc_lr_entry_t *pcc_lr_stack__pop(pcc_auxil_t auxil, pcc_lr_stack_t *stack) {
    return stack->buf[--stack->len];
}

static void pcc_lr_stack__term(pcc_auxil_t auxil, pcc_lr_stack_t *stack) {
    PCC_FREE(auxil, stack->buf);
}

static gvplain_context_t *pcc_context__create(pcc_auxil_t auxil) {
    gvplain_context_t *const ctx = (gvplain_context_t *)PCC_MALLOC(auxil, sizeof(gvplain_context_t));
    ctx->pos = 0;
    ctx->cur = 0;
    ctx->level = 0;
    pcc_char_array__init(auxil, &ctx->buffer, PCC_BUFFERSIZE);
    pcc_lr_table__init(auxil, &ctx->lrtable, PCC_BUFFERSIZE);
    pcc_lr_stack__init(auxil, &ctx->lrstack, PCC_ARRAYSIZE);
    ctx->auxil = auxil;
    return ctx;
}

static void pcc_context__destroy(gvplain_context_t *ctx) {
    if (ctx == NULL) return;
    pcc_lr_stack__term(ctx->auxil, &ctx->lrstack);
    pcc_lr_table__term(ctx->auxil, &ctx->lrtable);
    pcc_char_array__term(ctx->auxil, &ctx->buffer);
    PCC_FREE(ctx->auxil, ctx);
}

static size_t pcc_refill_buffer(gvplain_context_t *ctx, size_t num) {
    if (ctx->buffer.len >= ctx->cur + num) return ctx->buffer.len - ctx->cur;
    while (ctx->buffer.len < ctx->cur + num) {
        const int c = PCC_GETCHAR(ctx->auxil);
        if (c == EOF) break;
        pcc_char_array__add(ctx->auxil, &ctx->buffer, (char)c);
    }
    return ctx->buffer.len - ctx->cur;
}

static void pcc_commit_buffer(gvplain_context_t *ctx) {
    memmove(ctx->buffer.buf, ctx->buffer.buf + ctx->cur, ctx->buffer.len - ctx->cur);
    ctx->buffer.len -= ctx->cur;
    ctx->pos += ctx->cur;
    pcc_lr_table__shift(ctx->auxil, &ctx->lrtable, ctx->cur);
    ctx->cur = 0;
}

static const char *pcc_get_capture_string(gvplain_context_t *ctx, const pcc_capture_t *capt) {
    if (capt->string == NULL)
        ((pcc_capture_t *)capt)->string =
            pcc_strndup_e(ctx->auxil, ctx->buffer.buf + capt->range.start, capt->range.end - capt->range.start);
    return capt->string;
}

static size_t pcc_get_char_as_utf32(gvplain_context_t *ctx, int *out) { /* with checking UTF-8 validity */
    int c, u;
    size_t n;
    if (pcc_refill_buffer(ctx, 1) < 1) return 0;
    c = (int)(unsigned char)ctx->buffer.buf[ctx->cur];
    n = (c < 0x80) ? 1 :
        ((c & 0xe0) == 0xc0) ? 2 :
        ((c & 0xf0) == 0xe0) ? 3 :
        ((c & 0xf8) == 0xf0) ? 4 : 0;
    if (n < 1) return 0;
    if (pcc_refill_buffer(ctx, n) < n) return 0;
    switch (n) {
    case 1:
        u = c;
        break;
    case 2:
        u = c & 0x1f;
        c = (int)(unsigned char)ctx->buffer.buf[ctx->cur + 1];
        if ((c & 0xc0) != 0x80) return 0;
        u <<= 6; u |= c & 0x3f;
        if (u < 0x80) return 0;
        break;
    case 3:
        u = c & 0x0f;
        c = (int)(unsigned char)ctx->buffer.buf[ctx->cur + 1];
        if ((c & 0xc0) != 0x80) return 0;
        u <<= 6; u |= c & 0x3f;
        c = (int)(unsigned char)ctx->buffer.buf[ctx->cur + 2];
        if ((c & 0xc0) != 0x80) return 0;
        u <<= 6; u |= c & 0x3f;
        if (u < 0x800) return 0;
        break;
    case 4:
        u = c & 0x07;
        c = (int)(unsigned char)ctx->buffer.buf[ctx->cur + 1];
        if ((c & 0xc0) != 0x80) return 0;
        u <<= 6; u |= c & 0x3f;
        c = (int)(unsigned char)ctx->buffer.buf[ctx->cur + 2];
        if ((c & 0xc0) != 0x80) return 0;
        u <<= 6; u |= c & 0x3f;
        c = (int)(unsigned char)ctx->buffer.buf[ctx->cur + 3];
        if ((c & 0xc0) != 0x80) return 0;
        u <<= 6; u |= c & 0x3f;
        if (u < 0x10000 || u > 0x10ffff) return 0;
        break;
    default:
        return 0;
    }
    if (out) *out = u;
    return n;
}

static pcc_bool_t pcc_apply_rule(gvplain_context_t *ctx, pcc_rule_t rule, pcc_thunk_array_t *thunks, pcc_value_t *value) {
    static pcc_value_t null;
    pcc_thunk_chunk_t *c = NULL;
    const size_t p = ctx->pos + ctx->cur;
    pcc_bool_t b = PCC_TRUE;
    pcc_lr_answer_t *a = pcc_lr_table__get_answer(ctx->auxil, &ctx->lrtable, p, rule);
    pcc_lr_head_t *h = pcc_lr_table__get_head(ctx->auxil, &ctx->lrtable, p);
    if (h != NULL) {
        if (a == NULL && rule != h->rule && pcc_rule_set__index(ctx->auxil, &h->invol, rule) == VOID_VALUE) {
            b = PCC_FALSE;
            c = NULL;
        }
        else if (pcc_rule_set__remove(ctx->auxil, &h->eval, rule)) {
            b = PCC_FALSE;
            c = rule(ctx);
            a = pcc_lr_answer__create(ctx->auxil, PCC_LR_ANSWER_CHUNK, ctx->pos + ctx->cur);
            a->data.chunk = c;
            pcc_lr_table__hold_answer(ctx->auxil, &ctx->lrtable, p, a);
        }
    }
    if (b) {
        if (a != NULL) {
            ctx->cur = a->pos - ctx->pos;
            switch (a->type) {
            case PCC_LR_ANSWER_LR:
                if (a->data.lr->head == NULL) {
                    a->data.lr->head = pcc_lr_head__create(ctx->auxil, rule);
                    pcc_lr_table__hold_head(ctx->auxil, &ctx->lrtable, p, a->data.lr->head);
                }
                {
                    size_t i = ctx->lrstack.len;
                    while (i > 0) {
                        i--;
                        if (ctx->lrstack.buf[i]->head == a->data.lr->head) break;
                        ctx->lrstack.buf[i]->head = a->data.lr->head;
                        pcc_rule_set__add(ctx->auxil, &a->data.lr->head->invol, ctx->lrstack.buf[i]->rule);
                    }
                }
                c = a->data.lr->seed;
                break;
            case PCC_LR_ANSWER_CHUNK:
                c = a->data.chunk;
                break;
            default: /* unknown */
                break;
            }
        }
        else {
            pcc_lr_entry_t *const e = pcc_lr_entry__create(ctx->auxil, rule);
            pcc_lr_stack__push(ctx->auxil, &ctx->lrstack, e);
            a = pcc_lr_answer__create(ctx->auxil, PCC_LR_ANSWER_LR, p);
            a->data.lr = e;
            pcc_lr_table__set_answer(ctx->auxil, &ctx->lrtable, p, rule, a);
            c = rule(ctx);
            pcc_lr_stack__pop(ctx->auxil, &ctx->lrstack);
            a->pos = ctx->pos + ctx->cur;
            if (e->head == NULL) {
                pcc_lr_answer__set_chunk(ctx->auxil, a, c);
            }
            else {
                e->seed = c;
                h = a->data.lr->head;
                if (h->rule != rule) {
                    c = a->data.lr->seed;
                    a = pcc_lr_answer__create(ctx->auxil, PCC_LR_ANSWER_CHUNK, ctx->pos + ctx->cur);
                    a->data.chunk = c;
                    pcc_lr_table__hold_answer(ctx->auxil, &ctx->lrtable, p, a);
                }
                else {
                    pcc_lr_answer__set_chunk(ctx->auxil, a, a->data.lr->seed);
                    if (a->data.chunk == NULL) {
                        c = NULL;
                    }
                    else {
                        pcc_lr_table__set_head(ctx->auxil, &ctx->lrtable, p, h);
                        for (;;) {
                            ctx->cur = p - ctx->pos;
                            pcc_rule_set__copy(ctx->auxil, &h->eval, &h->invol);
                            c = rule(ctx);
                            if (c == NULL || ctx->pos + ctx->cur <= a->pos) break;
                            pcc_lr_answer__set_chunk(ctx->auxil, a, c);
                            a->pos = ctx->pos + ctx->cur;
                        }
                        pcc_thunk_chunk__destroy(ctx->auxil, c);
                        pcc_lr_table__set_head(ctx->auxil, &ctx->lrtable, p, NULL);
                        ctx->cur = a->pos - ctx->pos;
                        c = a->data.chunk;
                    }
                }
            }
        }
    }
    if (c == NULL) return PCC_FALSE;
    if (value == NULL) value = &null;
    memset(value, 0, sizeof(pcc_value_t)); /* in case */
    pcc_thunk_array__add(ctx->auxil, thunks, pcc_thunk__create_node(ctx->auxil, &c->thunks, value));
    return PCC_TRUE;
}

static void pcc_do_action(gvplain_context_t *ctx, const pcc_thunk_array_t *thunks, pcc_value_t *value) {
    size_t i;
    for (i = 0; i < thunks->len; i++) {
        pcc_thunk_t *const thunk = thunks->buf[i];
        switch (thunk->type) {
        case PCC_THUNK_LEAF:
            thunk->data.leaf.action(ctx, thunk, value);
            break;
        case PCC_THUNK_NODE:
            pcc_do_action(ctx, thunk->data.node.thunks, thunk->data.node.value);
            break;
        default: /* unknown */
            break;
        }
    }
}

static void pcc_action_nodes_0(gvplain_context_t *__pcc_ctx, pcc_thunk_t *__pcc_in, pcc_value_t *__pcc_out) {
#define auxil (__pcc_ctx->auxil)
#define __ (*__pcc_out)
#define _0 pcc_get_capture_string(__pcc_ctx, &__pcc_in->data.leaf.capt0)
#define _0s ((const size_t)__pcc_in->data.leaf.capt0.range.start)
#define _0e ((const size_t)__pcc_in->data.leaf.capt0.range.end)
    printf("node: \"%s\"\n",_0);
#undef _0e
#undef _0s
#undef _0
#undef __
#undef auxil
}

static void pcc_action_edges_el_0(gvplain_context_t *__pcc_ctx, pcc_thunk_t *__pcc_in, pcc_value_t *__pcc_out) {
#define auxil (__pcc_ctx->auxil)
#define __ (*__pcc_out)
#define _0 pcc_get_capture_string(__pcc_ctx, &__pcc_in->data.leaf.capt0)
#define _0s ((const size_t)__pcc_in->data.leaf.capt0.range.start)
#define _0e ((const size_t)__pcc_in->data.leaf.capt0.range.end)
    printf("edge-with-edgelabel: \"%s\"\n",_0);
#undef _0e
#undef _0s
#undef _0
#undef __
#undef auxil
}

static void pcc_action_edges_wl_0(gvplain_context_t *__pcc_ctx, pcc_thunk_t *__pcc_in, pcc_value_t *__pcc_out) {
#define auxil (__pcc_ctx->auxil)
#define __ (*__pcc_out)
#define _0 pcc_get_capture_string(__pcc_ctx, &__pcc_in->data.leaf.capt0)
#define _0s ((const size_t)__pcc_in->data.leaf.capt0.range.start)
#define _0e ((const size_t)__pcc_in->data.leaf.capt0.range.end)
    printf("edge-without-edgelabel: \"%s\"\n",_0);
#undef _0e
#undef _0s
#undef _0
#undef __
#undef auxil
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_gvplain(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_lines(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_linegraph(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_scale(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_width(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_height(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_nodes(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_name(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_name_char(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_x(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_y(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_width(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_height(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_label(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_char(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_style(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_shape(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_color(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_node_fillcolor(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edges(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edges_el(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edges_wl(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_tail(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_tail_char(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_head(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_head_char(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_pair(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_n(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_x(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_y(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_style(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_color(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_label(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_char(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_xl(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_yl(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_linestop(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_fpnum(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_digit(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule_eol(gvplain_context_t *ctx);
static pcc_thunk_chunk_t *pcc_evaluate_rule__(gvplain_context_t *ctx);

static pcc_thunk_chunk_t *pcc_evaluate_rule_gvplain(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "gvplain", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_lines, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule__, &chunk->thunks, NULL)) goto L0000;
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        {
            int u;
            const size_t n = pcc_get_char_as_utf32(ctx, &u);
            if (n == 0) goto L0001;
            ctx->cur += n;
        }
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        goto L0000;
    L0001:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "gvplain", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "gvplain", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_lines(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "lines", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_linegraph, &chunk->thunks, NULL)) goto L0000;
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (!pcc_apply_rule(ctx, pcc_evaluate_rule_nodes, &chunk->thunks, NULL)) goto L0001;
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edges, &chunk->thunks, NULL)) goto L0002;
            if (ctx->cur == p) break;
            continue;
        L0002:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (!pcc_apply_rule(ctx, pcc_evaluate_rule_linestop, &chunk->thunks, NULL)) goto L0003;
            if (ctx->cur == p) break;
            continue;
        L0003:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "lines", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "lines", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_linegraph(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "linegraph", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (
        pcc_refill_buffer(ctx, 5) < 5 ||
        (ctx->buffer.buf + ctx->cur)[0] != 'g' ||
        (ctx->buffer.buf + ctx->cur)[1] != 'r' ||
        (ctx->buffer.buf + ctx->cur)[2] != 'a' ||
        (ctx->buffer.buf + ctx->cur)[3] != 'p' ||
        (ctx->buffer.buf + ctx->cur)[4] != 'h'
    ) goto L0000;
    ctx->cur += 5;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_scale, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_width, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_height, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule__, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "linegraph", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "linegraph", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_scale(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "scale", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "scale", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "scale", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_width(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "width", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "width", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "width", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_height(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "height", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "height", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "height", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_nodes(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "nodes", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (
        pcc_refill_buffer(ctx, 4) < 4 ||
        (ctx->buffer.buf + ctx->cur)[0] != 'n' ||
        (ctx->buffer.buf + ctx->cur)[1] != 'o' ||
        (ctx->buffer.buf + ctx->cur)[2] != 'd' ||
        (ctx->buffer.buf + ctx->cur)[3] != 'e'
    ) goto L0000;
    ctx->cur += 4;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_name, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_x, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_y, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_width, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_height, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_label, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_style, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_shape, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_color, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_fillcolor, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule__, &chunk->thunks, NULL)) goto L0000;
    {
        pcc_thunk_t *const thunk = pcc_thunk__create_leaf(ctx->auxil, pcc_action_nodes_0, 0, 0);
        thunk->data.leaf.capt0.range.start = chunk->pos;
        thunk->data.leaf.capt0.range.end = ctx->cur;
        pcc_thunk_array__add(ctx->auxil, &chunk->thunks, thunk);
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "nodes", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "nodes", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_name(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_name", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_name_char, &chunk->thunks, NULL)) goto L0003;
                if (ctx->cur == p) break;
                continue;
            L0003:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                {
                    const size_t p = ctx->cur;
                    const size_t n = chunk->thunks.len;
                    if (
                        pcc_refill_buffer(ctx, 1) < 1 ||
                        ctx->buffer.buf[ctx->cur] != ' '
                    ) goto L0006;
                    ctx->cur++;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                    goto L0005;
                L0006:;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                }
                {
                    int u;
                    const size_t n = pcc_get_char_as_utf32(ctx, &u);
                    if (n == 0) goto L0005;
                    ctx->cur += n;
                }
                if (ctx->cur == p) break;
                continue;
            L0005:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_name", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_name_char(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_name_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0002;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        goto L0001;
    L0003:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0004;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'b'
        ) goto L0004;
        ctx->cur++;
        goto L0001;
    L0004:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0005;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'f'
        ) goto L0005;
        ctx->cur++;
        goto L0001;
    L0005:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0006;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'n'
        ) goto L0006;
        ctx->cur++;
        goto L0001;
    L0006:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0007;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'r'
        ) goto L0007;
        ctx->cur++;
        goto L0001;
    L0007:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0008;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 't'
        ) goto L0008;
        ctx->cur++;
        goto L0001;
    L0008:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (
                pcc_refill_buffer(ctx, 1) < 1 ||
                ctx->buffer.buf[ctx->cur] != '\"'
            ) goto L0010;
            ctx->cur++;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            goto L0009;
        L0010:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        }
        {
            int u;
            const size_t n = pcc_get_char_as_utf32(ctx, &u);
            if (n == 0) goto L0009;
            ctx->cur += n;
        }
        goto L0001;
    L0009:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        goto L0000;
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_name_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "node_name_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_x(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_x", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_x", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "node_x", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_y(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_y", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_y", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "node_y", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_width(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_width", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_width", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "node_width", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_height(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_height", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_height", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "node_height", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_label(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_label", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (!pcc_apply_rule(ctx, pcc_evaluate_rule_node_char, &chunk->thunks, NULL)) goto L0003;
                if (ctx->cur == p) break;
                continue;
            L0003:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                {
                    const size_t p = ctx->cur;
                    const size_t n = chunk->thunks.len;
                    if (
                        pcc_refill_buffer(ctx, 1) < 1 ||
                        ctx->buffer.buf[ctx->cur] != ' '
                    ) goto L0006;
                    ctx->cur++;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                    goto L0005;
                L0006:;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                }
                {
                    int u;
                    const size_t n = pcc_get_char_as_utf32(ctx, &u);
                    if (n == 0) goto L0005;
                    ctx->cur += n;
                }
                if (ctx->cur == p) break;
                continue;
            L0005:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_label", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_char(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0002;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        goto L0001;
    L0003:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0004;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'b'
        ) goto L0004;
        ctx->cur++;
        goto L0001;
    L0004:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0005;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'f'
        ) goto L0005;
        ctx->cur++;
        goto L0001;
    L0005:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0006;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'n'
        ) goto L0006;
        ctx->cur++;
        goto L0001;
    L0006:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0007;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'r'
        ) goto L0007;
        ctx->cur++;
        goto L0001;
    L0007:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0008;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 't'
        ) goto L0008;
        ctx->cur++;
        goto L0001;
    L0008:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (
                pcc_refill_buffer(ctx, 1) < 1 ||
                ctx->buffer.buf[ctx->cur] != '\"'
            ) goto L0010;
            ctx->cur++;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            goto L0009;
        L0010:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        }
        {
            int u;
            const size_t n = pcc_get_char_as_utf32(ctx, &u);
            if (n == 0) goto L0009;
            ctx->cur += n;
        }
        goto L0001;
    L0009:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        goto L0000;
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "node_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_style(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_style", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (
                    pcc_refill_buffer(ctx, 1) < 1 ||
                    ctx->buffer.buf[ctx->cur] != ' '
                ) goto L0002;
                ctx->cur++;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                goto L0001;
            L0002:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            }
            {
                int u;
                const size_t n = pcc_get_char_as_utf32(ctx, &u);
                if (n == 0) goto L0001;
                ctx->cur += n;
            }
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_style", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_shape(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_shape", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (
                    pcc_refill_buffer(ctx, 1) < 1 ||
                    ctx->buffer.buf[ctx->cur] != ' '
                ) goto L0002;
                ctx->cur++;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                goto L0001;
            L0002:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            }
            {
                int u;
                const size_t n = pcc_get_char_as_utf32(ctx, &u);
                if (n == 0) goto L0001;
                ctx->cur += n;
            }
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_shape", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_color(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_color", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (
                    pcc_refill_buffer(ctx, 1) < 1 ||
                    ctx->buffer.buf[ctx->cur] != ' '
                ) goto L0002;
                ctx->cur++;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                goto L0001;
            L0002:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            }
            {
                int u;
                const size_t n = pcc_get_char_as_utf32(ctx, &u);
                if (n == 0) goto L0001;
                ctx->cur += n;
            }
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_color", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_node_fillcolor(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "node_fillcolor", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                {
                    int u;
                    const size_t n = pcc_get_char_as_utf32(ctx, &u);
                    if (n == 0) goto L0002;
                    if (!(
                        u == 0x00000a
                    )) goto L0002;
                    ctx->cur += n;
                }
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                goto L0001;
            L0002:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            }
            {
                int u;
                const size_t n = pcc_get_char_as_utf32(ctx, &u);
                if (n == 0) goto L0001;
                ctx->cur += n;
            }
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "node_fillcolor", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edges(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edges", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edges_el, &chunk->thunks, NULL)) goto L0002;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edges_wl, &chunk->thunks, NULL)) goto L0003;
        goto L0001;
    L0003:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        goto L0000;
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edges", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edges", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edges_el(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edges_el", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (
        pcc_refill_buffer(ctx, 4) < 4 ||
        (ctx->buffer.buf + ctx->cur)[0] != 'e' ||
        (ctx->buffer.buf + ctx->cur)[1] != 'd' ||
        (ctx->buffer.buf + ctx->cur)[2] != 'g' ||
        (ctx->buffer.buf + ctx->cur)[3] != 'e'
    ) goto L0000;
    ctx->cur += 4;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_tail, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule__, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_head, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_n, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    {
        const size_t p0 = ctx->cur;
        const size_t n0 = chunk->thunks.len;
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_pair, &chunk->thunks, NULL)) goto L0001;
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
        if (i < 1) {
            ctx->cur = p0;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n0);
            goto L0000;
        }
    }
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_label, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_xl, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_yl, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_style, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_color, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule__, &chunk->thunks, NULL)) goto L0000;
    {
        pcc_thunk_t *const thunk = pcc_thunk__create_leaf(ctx->auxil, pcc_action_edges_el_0, 0, 0);
        thunk->data.leaf.capt0.range.start = chunk->pos;
        thunk->data.leaf.capt0.range.end = ctx->cur;
        pcc_thunk_array__add(ctx->auxil, &chunk->thunks, thunk);
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edges_el", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edges_el", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edges_wl(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edges_wl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (
        pcc_refill_buffer(ctx, 4) < 4 ||
        (ctx->buffer.buf + ctx->cur)[0] != 'e' ||
        (ctx->buffer.buf + ctx->cur)[1] != 'd' ||
        (ctx->buffer.buf + ctx->cur)[2] != 'g' ||
        (ctx->buffer.buf + ctx->cur)[3] != 'e'
    ) goto L0000;
    ctx->cur += 4;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_tail, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule__, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_head, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_n, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    {
        const size_t p0 = ctx->cur;
        const size_t n0 = chunk->thunks.len;
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_pair, &chunk->thunks, NULL)) goto L0001;
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
        if (i < 1) {
            ctx->cur = p0;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n0);
            goto L0000;
        }
    }
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_style, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_color, &chunk->thunks, NULL)) goto L0000;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule__, &chunk->thunks, NULL)) goto L0000;
    {
        pcc_thunk_t *const thunk = pcc_thunk__create_leaf(ctx->auxil, pcc_action_edges_wl_0, 0, 0);
        thunk->data.leaf.capt0.range.start = chunk->pos;
        thunk->data.leaf.capt0.range.end = ctx->cur;
        pcc_thunk_array__add(ctx->auxil, &chunk->thunks, thunk);
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edges_wl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edges_wl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_tail(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_tail", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_tail_char, &chunk->thunks, NULL)) goto L0003;
                if (ctx->cur == p) break;
                continue;
            L0003:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                {
                    const size_t p = ctx->cur;
                    const size_t n = chunk->thunks.len;
                    if (
                        pcc_refill_buffer(ctx, 1) < 1 ||
                        ctx->buffer.buf[ctx->cur] != ' '
                    ) goto L0006;
                    ctx->cur++;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                    goto L0005;
                L0006:;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                }
                {
                    int u;
                    const size_t n = pcc_get_char_as_utf32(ctx, &u);
                    if (n == 0) goto L0005;
                    ctx->cur += n;
                }
                if (ctx->cur == p) break;
                continue;
            L0005:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_tail", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_tail_char(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_tail_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0002;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        goto L0001;
    L0003:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0004;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'b'
        ) goto L0004;
        ctx->cur++;
        goto L0001;
    L0004:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0005;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'f'
        ) goto L0005;
        ctx->cur++;
        goto L0001;
    L0005:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0006;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'n'
        ) goto L0006;
        ctx->cur++;
        goto L0001;
    L0006:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0007;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'r'
        ) goto L0007;
        ctx->cur++;
        goto L0001;
    L0007:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0008;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 't'
        ) goto L0008;
        ctx->cur++;
        goto L0001;
    L0008:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (
                pcc_refill_buffer(ctx, 1) < 1 ||
                ctx->buffer.buf[ctx->cur] != '\"'
            ) goto L0010;
            ctx->cur++;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            goto L0009;
        L0010:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        }
        {
            int u;
            const size_t n = pcc_get_char_as_utf32(ctx, &u);
            if (n == 0) goto L0009;
            ctx->cur += n;
        }
        goto L0001;
    L0009:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        goto L0000;
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_tail_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edge_tail_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_head(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_head", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_head_char, &chunk->thunks, NULL)) goto L0003;
                if (ctx->cur == p) break;
                continue;
            L0003:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                {
                    const size_t p = ctx->cur;
                    const size_t n = chunk->thunks.len;
                    if (
                        pcc_refill_buffer(ctx, 1) < 1 ||
                        ctx->buffer.buf[ctx->cur] != ' '
                    ) goto L0006;
                    ctx->cur++;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                    goto L0005;
                L0006:;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                }
                {
                    int u;
                    const size_t n = pcc_get_char_as_utf32(ctx, &u);
                    if (n == 0) goto L0005;
                    ctx->cur += n;
                }
                if (ctx->cur == p) break;
                continue;
            L0005:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_head", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_head_char(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_head_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0002;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        goto L0001;
    L0003:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0004;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'b'
        ) goto L0004;
        ctx->cur++;
        goto L0001;
    L0004:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0005;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'f'
        ) goto L0005;
        ctx->cur++;
        goto L0001;
    L0005:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0006;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'n'
        ) goto L0006;
        ctx->cur++;
        goto L0001;
    L0006:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0007;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'r'
        ) goto L0007;
        ctx->cur++;
        goto L0001;
    L0007:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0008;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 't'
        ) goto L0008;
        ctx->cur++;
        goto L0001;
    L0008:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (
                pcc_refill_buffer(ctx, 1) < 1 ||
                ctx->buffer.buf[ctx->cur] != '\"'
            ) goto L0010;
            ctx->cur++;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            goto L0009;
        L0010:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        }
        {
            int u;
            const size_t n = pcc_get_char_as_utf32(ctx, &u);
            if (n == 0) goto L0009;
            ctx->cur += n;
        }
        goto L0001;
    L0009:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        goto L0000;
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_head_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edge_head_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_pair(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_pair", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_x, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_y, &chunk->thunks, NULL)) goto L0000;
    if (
        pcc_refill_buffer(ctx, 1) < 1 ||
        ctx->buffer.buf[ctx->cur] != ' '
    ) goto L0000;
    ctx->cur++;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_pair", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edge_pair", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_n(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_n", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (
                    pcc_refill_buffer(ctx, 1) < 1 ||
                    ctx->buffer.buf[ctx->cur] != ' '
                ) goto L0002;
                ctx->cur++;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                goto L0001;
            L0002:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            }
            {
                int u;
                const size_t n = pcc_get_char_as_utf32(ctx, &u);
                if (n == 0) goto L0001;
                ctx->cur += n;
            }
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_n", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_x(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_x", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_x", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edge_x", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_y(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_y", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_y", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edge_y", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_style(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_style", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (
                    pcc_refill_buffer(ctx, 1) < 1 ||
                    ctx->buffer.buf[ctx->cur] != ' '
                ) goto L0002;
                ctx->cur++;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                goto L0001;
            L0002:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            }
            {
                int u;
                const size_t n = pcc_get_char_as_utf32(ctx, &u);
                if (n == 0) goto L0001;
                ctx->cur += n;
            }
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_style", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_color(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_color", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (!pcc_apply_rule(ctx, pcc_evaluate_rule_eol, &chunk->thunks, NULL)) goto L0002;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                goto L0001;
            L0002:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            }
            {
                int u;
                const size_t n = pcc_get_char_as_utf32(ctx, &u);
                if (n == 0) goto L0001;
                ctx->cur += n;
            }
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_color", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_label(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_label", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (!pcc_apply_rule(ctx, pcc_evaluate_rule_edge_char, &chunk->thunks, NULL)) goto L0003;
                if (ctx->cur == p) break;
                continue;
            L0003:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                {
                    const size_t p = ctx->cur;
                    const size_t n = chunk->thunks.len;
                    if (
                        pcc_refill_buffer(ctx, 1) < 1 ||
                        ctx->buffer.buf[ctx->cur] != ' '
                    ) goto L0006;
                    ctx->cur++;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                    goto L0005;
                L0006:;
                    ctx->cur = p;
                    pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                }
                {
                    int u;
                    const size_t n = pcc_get_char_as_utf32(ctx, &u);
                    if (n == 0) goto L0005;
                    ctx->cur += n;
                }
                if (ctx->cur == p) break;
                continue;
            L0005:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_label", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_char(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0002;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\"'
        ) goto L0002;
        ctx->cur++;
        goto L0001;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0003;
        ctx->cur++;
        goto L0001;
    L0003:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0004;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'b'
        ) goto L0004;
        ctx->cur++;
        goto L0001;
    L0004:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0005;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'f'
        ) goto L0005;
        ctx->cur++;
        goto L0001;
    L0005:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0006;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'n'
        ) goto L0006;
        ctx->cur++;
        goto L0001;
    L0006:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0007;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 'r'
        ) goto L0007;
        ctx->cur++;
        goto L0001;
    L0007:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '\\'
        ) goto L0008;
        ctx->cur++;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != 't'
        ) goto L0008;
        ctx->cur++;
        goto L0001;
    L0008:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (
                pcc_refill_buffer(ctx, 1) < 1 ||
                ctx->buffer.buf[ctx->cur] != '\"'
            ) goto L0010;
            ctx->cur++;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            goto L0009;
        L0010:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        }
        {
            int u;
            const size_t n = pcc_get_char_as_utf32(ctx, &u);
            if (n == 0) goto L0009;
            ctx->cur += n;
        }
        goto L0001;
    L0009:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
        goto L0000;
    L0001:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edge_char", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_xl(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_xl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_xl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edge_xl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_edge_yl(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "edge_yl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (!pcc_apply_rule(ctx, pcc_evaluate_rule_fpnum, &chunk->thunks, NULL)) goto L0000;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "edge_yl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "edge_yl", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_linestop(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "linestop", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    if (
        pcc_refill_buffer(ctx, 4) < 4 ||
        (ctx->buffer.buf + ctx->cur)[0] != 's' ||
        (ctx->buffer.buf + ctx->cur)[1] != 't' ||
        (ctx->buffer.buf + ctx->cur)[2] != 'o' ||
        (ctx->buffer.buf + ctx->cur)[3] != 'p'
    ) goto L0000;
    ctx->cur += 4;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "linestop", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "linestop", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_fpnum(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "fpnum", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        const size_t p0 = ctx->cur;
        const size_t n0 = chunk->thunks.len;
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            if (!pcc_apply_rule(ctx, pcc_evaluate_rule_digit, &chunk->thunks, NULL)) goto L0001;
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
        if (i < 1) {
            ctx->cur = p0;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n0);
            goto L0000;
        }
    }
    {
        const size_t p = ctx->cur;
        const size_t n = chunk->thunks.len;
        if (
            pcc_refill_buffer(ctx, 1) < 1 ||
            ctx->buffer.buf[ctx->cur] != '.'
        ) goto L0002;
        ctx->cur++;
        {
            int i;
            for (i = 0;; i++) {
                const size_t p = ctx->cur;
                const size_t n = chunk->thunks.len;
                if (!pcc_apply_rule(ctx, pcc_evaluate_rule_digit, &chunk->thunks, NULL)) goto L0003;
                if (ctx->cur == p) break;
                continue;
            L0003:;
                ctx->cur = p;
                pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
                break;
            }
        }
        goto L0004;
    L0002:;
        ctx->cur = p;
        pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
    L0004:;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "fpnum", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "fpnum", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_digit(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "digit", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int u;
        const size_t n = pcc_get_char_as_utf32(ctx, &u);
        if (n == 0) goto L0000;
        if (!(
            (u >= 0x000030 && u <= 0x000039)
        )) goto L0000;
        ctx->cur += n;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "digit", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "digit", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule_eol(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "eol", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int u;
        const size_t n = pcc_get_char_as_utf32(ctx, &u);
        if (n == 0) goto L0000;
        if (!(
            u == 0x00000a
        )) goto L0000;
        ctx->cur += n;
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "eol", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
L0000:;
    ctx->level--;
    PCC_DEBUG(PCC_DBG_NOMATCH, "eol", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    pcc_thunk_chunk__destroy(ctx->auxil, chunk);
    return NULL;
}

static pcc_thunk_chunk_t *pcc_evaluate_rule__(gvplain_context_t *ctx) {
    pcc_thunk_chunk_t *const chunk = pcc_thunk_chunk__create(ctx->auxil);
    chunk->pos = ctx->cur;
    PCC_DEBUG(PCC_DBG_EVALUATE, "_", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->buffer.len - chunk->pos));
    ctx->level++;
    pcc_value_table__resize(ctx->auxil, &chunk->values, 0);
    pcc_capture_table__resize(ctx->auxil, &chunk->capts, 0);
    {
        int i;
        for (i = 0;; i++) {
            const size_t p = ctx->cur;
            const size_t n = chunk->thunks.len;
            {
                int u;
                const size_t n = pcc_get_char_as_utf32(ctx, &u);
                if (n == 0) goto L0001;
                if (!(
                    u == 0x000020 ||
                    u == 0x000009 ||
                    u == 0x00000a ||
                    u == 0x00000d
                )) goto L0001;
                ctx->cur += n;
            }
            if (ctx->cur == p) break;
            continue;
        L0001:;
            ctx->cur = p;
            pcc_thunk_array__revert(ctx->auxil, &chunk->thunks, n);
            break;
        }
    }
    ctx->level--;
    PCC_DEBUG(PCC_DBG_MATCH, "_", ctx->level, chunk->pos, (ctx->buffer.buf + chunk->pos), (ctx->cur - chunk->pos));
    return chunk;
}

gvplain_context_t *gvplain_create(void *auxil) {
    return pcc_context__create(auxil);
}

int gvplain_parse(gvplain_context_t *ctx, int *ret) {
    pcc_thunk_array_t thunks;
    pcc_thunk_array__init(ctx->auxil, &thunks, PCC_ARRAYSIZE);
    if (pcc_apply_rule(ctx, pcc_evaluate_rule_gvplain, &thunks, ret))
        pcc_do_action(ctx, &thunks, ret);
    else
        PCC_ERROR(ctx->auxil);
    pcc_commit_buffer(ctx);
    pcc_thunk_array__term(ctx->auxil, &thunks);
    return pcc_refill_buffer(ctx, 1) >= 1;
}

void gvplain_destroy(gvplain_context_t *ctx) {
    pcc_context__destroy(ctx);
}


int main() {
    gvplain_context_t *ctx=gvplain_create(NULL);
    while (gvplain_parse(ctx, NULL)){;}
    gvplain_destroy(ctx);
    return 0;
}