26 lines
632 B
C
26 lines
632 B
C
#include "parser_internal.h"
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static HParseResult *parse_and(void* env, HParseState* state) {
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HInputStream bak = state->input_stream;
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HParseResult *res = h_do_parse((HParser*)env, state);
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state->input_stream = bak;
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if (res)
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return make_result(state, NULL);
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return NULL;
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}
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static const HParserVtable and_vt = {
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.parse = parse_and,
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};
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const HParser* h_and(const HParser* p) {
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return h_and__m(&system_allocator, p);
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}
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const HParser* h_and__m(HAllocator* mm__, const HParser* p) {
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// zero-width postive lookahead
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HParser *res = h_new(HParser, 1);
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res->env = (void*)p;
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res->vtable = &and_vt;
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return res;
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}
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