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Fixed backtracking problem.

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This commit is contained in:
yhirose 2015-08-05 23:45:59 -04:00
parent 85eb054106
commit 53ead0be7c
1 changed files with 7 additions and 1 deletions
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8
peglib.h
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@ -673,7 +673,12 @@ public:
size_t parse(const char* s, size_t n, SemanticValues& sv, Context& c, any& dt) const override {
const auto& rule = *ope_;
auto len = rule.parse(s, n, sv, c, dt);
return success(len) ? len : 0;
if (success(len)) {
return len;
} else {
sv.rewind(s);
return 0;
}
}
void accept(Visitor& v) override;
@ -716,6 +721,7 @@ public:
c.set_error_pos(s);
return -1;
} else {
sv.rewind(s);
c.error_pos = error_pos;
return 0;
}