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Include precedences in unresolved conflict messages

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This commit is contained in:
Max Brunsfeld 2015-03-23 22:56:17 -07:00
parent b1f8ba6202
commit 9ef52ce2fb
2 changed files with 38 additions and 16 deletions
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35
spec/compiler/build_tables/parse_conflict_manager_spec.cc
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@ -148,8 +148,8 @@ describe("ParseConflictManager", []() {
AssertThat(get<2>(result), Equals(
"Lookahead: lookahead_token\n"
"Possible Actions:\n"
"* Shift\n"
"* Reduce other_rule1 other_rule2 -> reduced_rule"
"* Shift (Precedence 0)\n"
"* Reduce other_rule1 other_rule2 -> reduced_rule (Precedence 0)"
));
result = conflict_manager->resolve(shift, reduce, lookahead_sym);
@ -157,26 +157,35 @@ describe("ParseConflictManager", []() {
AssertThat(get<2>(result), Equals(
"Lookahead: lookahead_token\n"
"Possible Actions:\n"
"* Shift\n"
"* Reduce other_rule1 other_rule2 -> reduced_rule"
"* Shift (Precedence 0)\n"
"* Reduce other_rule1 other_rule2 -> reduced_rule (Precedence 0)"
));
});
});
describe("when the shift has conflicting precedences compared to the reduce", [&]() {
ParseAction shift = ParseAction::Shift(2, { 0, 1, 3 });
ParseAction reduce = ParseAction::Reduce(sym2, 1, 2, AssociativityLeft, 0);
ParseAction reduce = ParseAction::Reduce(Symbol(2), 1, 2, AssociativityLeft, 0);
it("returns false and reports an unresolved conflict", [&]() {
reduce.production_id = conflict_manager->get_production_id({ Symbol(1) });
result = conflict_manager->resolve(reduce, shift, sym2);
reduce.production_id = conflict_manager->get_production_id(vector<Symbol>({
Symbol(3),
Symbol(4),
}));
result = conflict_manager->resolve(reduce, shift, lookahead_sym);
AssertThat(get<0>(result), IsFalse());
AssertThat(get<1>(result), Equals(ConflictTypeError));
result = conflict_manager->resolve(shift, reduce, sym1);
result = conflict_manager->resolve(shift, reduce, lookahead_sym);
AssertThat(get<0>(result), IsTrue());
AssertThat(get<1>(result), Equals(ConflictTypeError));
AssertThat(get<2>(result), Equals(
"Lookahead: lookahead_token\n"
"Possible Actions:\n"
"* Shift (Precedences 0, 3)\n"
"* Reduce other_rule1 other_rule2 -> reduced_rule (Precedence 2)"
));
});
});
});
@ -217,8 +226,8 @@ describe("ParseConflictManager", []() {
AssertThat(get<2>(result), Equals(
"Lookahead: lookahead_token\n"
"Possible Actions:\n"
"* Reduce other_rule1 other_rule2 -> reduced_rule\n"
"* Reduce other_rule2 -> other_rule1"
"* Reduce other_rule1 other_rule2 -> reduced_rule (Precedence 0)\n"
"* Reduce other_rule2 -> other_rule1 (Precedence 0)"
));
result = conflict_manager->resolve(left, right, lookahead_sym);
@ -227,8 +236,8 @@ describe("ParseConflictManager", []() {
AssertThat(get<2>(result), Equals(
"Lookahead: lookahead_token\n"
"Possible Actions:\n"
"* Reduce other_rule2 -> other_rule1\n"
"* Reduce other_rule1 other_rule2 -> reduced_rule"
"* Reduce other_rule2 -> other_rule1 (Precedence 0)\n"
"* Reduce other_rule1 other_rule2 -> reduced_rule (Precedence 0)"
));
});
});