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Implemented and

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This commit is contained in:
Dan Hirsch 2012-05-23 15:55:40 +02:00
parent 05ef58b958
commit 56a5845674
1 changed files with 17 additions and 2 deletions
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19
src/hammer.c
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@ -228,7 +228,7 @@ static parse_result_t* parse_unimplemented(void* env, parse_state_t *state) {
return &result;
}
static parser_t unimplemented = {
static parser_t unimplemented __attribute__((unused)) = {
.fn = parse_unimplemented,
.env = NULL
};
@ -883,7 +883,22 @@ const parser_t* length_value(const parser_t* length, const parser_t* value) {
return res;
}
const parser_t* and(const parser_t* p) { return &unimplemented; }
static parse_result_t *parse_and(void* env, parse_state_t* state) {
input_stream_t bak = state->input_stream;
parse_result_t *res = do_parse((parser_t*)env, state);
state->input_stream = bak;
if (res)
return make_result(state, NULL);
return NULL;
}
const parser_t* and(const parser_t* p) {
// zero-width postive lookahead
parser_t *res = g_new(parser_t, 1);
res->env = (void*)p;
res->fn = parse_and;
return res;
}
static parse_result_t* parse_not(void* env, parse_state_t* state) {
input_stream_t bak = state->input_stream;