66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
#include "compiler/compiler_spec_helper.h"
|
|
#include "compiler/rules/built_in_symbols.h"
|
|
#include "compiler/parse_table.h"
|
|
#include "compiler/build_tables/lex_conflict_manager.h"
|
|
#include "compiler/syntax_grammar.h"
|
|
|
|
using namespace rules;
|
|
using namespace build_tables;
|
|
|
|
START_TEST
|
|
|
|
describe("LexConflictManager", []() {
|
|
LexicalGrammar lexical_grammar({
|
|
{ "other_token", pattern("[a-b]") },
|
|
{ "lookahead_token", pattern("[c-d]") },
|
|
}, {});
|
|
|
|
LexConflictManager conflict_manager(lexical_grammar);
|
|
|
|
bool update;
|
|
Symbol sym1(0, SymbolOptionToken);
|
|
Symbol sym2(1, SymbolOptionToken);
|
|
Symbol sym3(2, SymbolOptionToken);
|
|
|
|
it("favors non-errors over lexical errors", [&]() {
|
|
update = conflict_manager.resolve(LexAction::Advance(2, {0}), LexAction::Error());
|
|
AssertThat(update, IsTrue());
|
|
|
|
update = conflict_manager.resolve(LexAction::Error(), LexAction::Advance(2, {0}));
|
|
AssertThat(update, IsFalse());
|
|
});
|
|
|
|
describe("accept-token/advance conflicts", [&]() {
|
|
it("prefers the advance", [&]() {
|
|
update = conflict_manager.resolve(LexAction::Advance(1, { 0 }), LexAction::Accept(sym3, 3));
|
|
AssertThat(update, IsTrue());
|
|
|
|
update = conflict_manager.resolve(LexAction::Accept(sym3, 3), LexAction::Advance(1, { 0 }));
|
|
AssertThat(update, IsFalse());
|
|
});
|
|
});
|
|
|
|
describe("accept-token/accept-token conflicts", [&]() {
|
|
describe("when one token has a higher precedence than the other", [&]() {
|
|
it("prefers the token with the higher precedence", [&]() {
|
|
update = conflict_manager.resolve(LexAction::Accept(sym2, 0), LexAction::Accept(sym3, 2));
|
|
AssertThat(update, IsFalse());
|
|
|
|
update = conflict_manager.resolve(LexAction::Accept(sym3, 2), LexAction::Accept(sym2, 0));
|
|
AssertThat(update, IsTrue());
|
|
});
|
|
});
|
|
|
|
describe("when both tokens have the same precedence", [&]() {
|
|
it("prefers the token listed earlier in the grammar", [&]() {
|
|
update = conflict_manager.resolve(LexAction::Accept(sym2, 0), LexAction::Accept(sym1, 0));
|
|
AssertThat(update, IsFalse());
|
|
|
|
update = conflict_manager.resolve(LexAction::Accept(sym1, 0), LexAction::Accept(sym2, 0));
|
|
AssertThat(update, IsTrue());
|
|
});
|
|
});
|
|
});
|
|
});
|
|
|
|
END_TEST
|