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Code Issues 1 Releases Wiki Activity

Allow compiling tables as peg grammars.

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This commit is contained in:
Calvin Rose 2021-10-23 09:59:36 -05:00
parent 32103441f1
commit eb4595158d
1 changed files with 12 additions and 0 deletions
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12
src/core/peg.c
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@ -1253,6 +1253,18 @@ static uint32_t peg_compile1(Builder *b, Janet peg) {
emit_bytes(b, RULE_LITERAL, len, str);
break;
}
case JANET_TABLE: {
/* Build grammar table */
JanetTable *new_grammar = janet_table_clone(janet_unwrap_table(peg));
new_grammar->proto = grammar;
b->grammar = grammar = new_grammar;
/* Run the main rule */
Janet main_rule = janet_table_rawget(grammar, janet_ckeywordv("main"));
if (janet_checktype(main_rule, JANET_NIL))
peg_panic(b, "grammar requires :main rule");
rule = peg_compile1(b, main_rule);
break;
}
case JANET_STRUCT: {
/* Build grammar table */
const JanetKV *st = janet_unwrap_struct(peg);