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Fix resolution of shift-extra vs reduce actions

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This commit is contained in:
Max Brunsfeld 2015-12-17 15:19:58 -08:00
parent 351b4f4aaa
commit a8d2585330
2 changed files with 38 additions and 14 deletions
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33
spec/compiler/build_tables/parse_conflict_manager_spec.cc
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@ -41,15 +41,38 @@ describe("ParseConflictManager", []() {
});
describe("shift-extra actions", [&]() {
ParseAction shift_extra = ParseAction::Error();
ParseAction other = ParseAction::Shift(2, { 0, 0 });
ParseAction shift_extra = ParseAction::ShiftExtra();
ParseAction shift = ParseAction::Shift(2, { 0, 0 });
ParseAction reduce = ParseAction::Reduce(sym2, 1, -1, AssociativityRight, production);
it("favors other actions over shift-extra actions", [&]() {
result = conflict_manager->resolve(other, shift_extra);
it("favors any shift action over a shift-extra actions", [&]() {
result = conflict_manager->resolve(shift, shift_extra);
AssertThat(result.first, IsTrue());
AssertThat(result.second, Equals(ConflictTypeNone));
result = conflict_manager->resolve(shift_extra, other);
result = conflict_manager->resolve(shift_extra, shift);
AssertThat(result.first, IsFalse());
AssertThat(result.second, Equals(ConflictTypeNone));
});
it("favors any reduce action over a shift-extra actions", [&]() {
result = conflict_manager->resolve(reduce, shift_extra);
AssertThat(result.first, IsTrue());
AssertThat(result.second, Equals(ConflictTypeNone));
result = conflict_manager->resolve(shift_extra, reduce);
AssertThat(result.first, IsFalse());
AssertThat(result.second, Equals(ConflictTypeNone));
});
});
describe("reduce-extra actions", [&]() {
it("favors shift-extra actions over reduce-extra actions", [&]() {
result = conflict_manager->resolve(ParseAction::ShiftExtra(), ParseAction::ReduceExtra(sym1));
AssertThat(result.first, IsTrue());
AssertThat(result.second, Equals(ConflictTypeNone));
result = conflict_manager->resolve(ParseAction::ReduceExtra(sym1), ParseAction::ShiftExtra());
AssertThat(result.first, IsFalse());
AssertThat(result.second, Equals(ConflictTypeNone));
});