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Fix #112

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yhirose 2020-06-08 22:54:35 -04:00
parent 94578c5274
commit ff9e5d6ea3
2 changed files with 24 additions and 0 deletions
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6
peglib.h
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@ -1762,6 +1762,7 @@ struct AssignIDToDefinition : public Ope::Visitor {
void visit(Holder &ope) override;
void visit(Reference &ope) override;
void visit(Whitespace &ope) override { ope.ope_->accept(*this); }
void visit(PrecedenceClimbing &ope) override;
std::unordered_map<void *, size_t> ids;
};
@ -2733,6 +2734,11 @@ inline void AssignIDToDefinition::visit(Reference &ope) {
}
}
inline void AssignIDToDefinition::visit(PrecedenceClimbing &ope) {
ope.atom_->accept(*this);
ope.binop_->accept(*this);
}
inline void TokenChecker::visit(WeakHolder & /*ope*/) { has_rule_ = true; }
inline void TokenChecker::visit(Reference &ope) {

18
test/test2.cc
View File

@ -325,6 +325,24 @@ TEST_CASE("Packrat parser test with macro", "[packrat]")
REQUIRE(ret == true);
}
TEST_CASE("Packrat parser test with precedence expression parser", "[packrat]") {
peg::parser parser(R"(
Expression <- Atom (Operator Atom)* { precedence L + - L * / }
Atom <- _? Number _?
Number <- [0-9]+
Operator <- '+' / '-' / '*' / '/'
_ <- ' '+
)");
bool ret = parser;
REQUIRE(ret == true);
parser.enable_packrat_parsing();
ret = parser.parse(" 1 + 2 * 3 ");
REQUIRE(ret == true);
}
TEST_CASE("Backreference test", "[backreference]")
{
parser parser(R"(