113 lines
3.3 KiB
C++
113 lines
3.3 KiB
C++
#include "compiler/compiler_spec_helper.h"
|
|
#include "compiler/prepared_grammar.h"
|
|
#include "compiler/prepare_grammar/expand_repeats.h"
|
|
#include "compiler/helpers/containers.h"
|
|
|
|
START_TEST
|
|
|
|
using namespace rules;
|
|
using prepare_grammar::expand_repeats;
|
|
|
|
describe("expanding repeat rules in a grammar", []() {
|
|
it("replaces repeat rules with pairs of recursive rules", [&]() {
|
|
SyntaxGrammar grammar({
|
|
{ "rule0", repeat(i_token(0)) },
|
|
}, {}, {});
|
|
|
|
auto match = expand_repeats(grammar);
|
|
|
|
AssertThat(match.rules, Equals(rule_list({
|
|
{ "rule0", i_aux_sym(0) },
|
|
})));
|
|
|
|
AssertThat(match.aux_rules, Equals(rule_list({
|
|
{ "rule0_repeat0", choice({ seq({ i_token(0), i_aux_sym(0) }), blank() }) },
|
|
})));
|
|
});
|
|
|
|
it("replaces repeats inside of sequences", [&]() {
|
|
SyntaxGrammar grammar({
|
|
{ "rule0", seq({ i_token(10), repeat(i_token(11)) }) },
|
|
}, {}, {});
|
|
|
|
auto match = expand_repeats(grammar);
|
|
|
|
AssertThat(match.rules, Equals(rule_list({
|
|
{ "rule0", seq({ i_token(10), i_aux_sym(0) }) },
|
|
})));
|
|
|
|
AssertThat(match.aux_rules, Equals(rule_list({
|
|
{ "rule0_repeat0", choice({
|
|
seq({ i_token(11), i_aux_sym(0) }),
|
|
blank() }) },
|
|
})));
|
|
});
|
|
|
|
it("replaces repeats inside of choices", [&]() {
|
|
SyntaxGrammar grammar({
|
|
{ "rule0", choice({ i_token(10), repeat(i_token(11)) }) },
|
|
}, {}, {});
|
|
|
|
auto match = expand_repeats(grammar);
|
|
|
|
AssertThat(match.rules, Equals(rule_list({
|
|
{ "rule0", choice({ i_token(10), i_aux_sym(0) }) },
|
|
})));
|
|
|
|
AssertThat(match.aux_rules, Equals(rule_list({
|
|
{ "rule0_repeat0", choice({
|
|
seq({ i_token(11), i_aux_sym(0) }),
|
|
blank() }) },
|
|
})));
|
|
});
|
|
|
|
it("can replace multiple repeats in the same rule", [&]() {
|
|
SyntaxGrammar grammar({
|
|
{ "rule0", seq({ repeat(i_token(10)), repeat(i_token(11)) }) },
|
|
}, {}, {});
|
|
|
|
auto match = expand_repeats(grammar);
|
|
|
|
AssertThat(match.rules, Equals(rule_list({
|
|
{ "rule0", seq({ i_aux_sym(0), i_aux_sym(1) }) },
|
|
})));
|
|
|
|
AssertThat(match.aux_rules, Equals(rule_list({
|
|
{ "rule0_repeat0", choice({
|
|
seq({
|
|
i_token(10),
|
|
i_aux_sym(0) }),
|
|
blank() }) },
|
|
{ "rule0_repeat1", choice({
|
|
seq({
|
|
i_token(11),
|
|
i_aux_sym(1) }),
|
|
blank() }) },
|
|
})));
|
|
});
|
|
|
|
it("can replace repeats in multiple rules", [&]() {
|
|
SyntaxGrammar grammar({
|
|
{ "rule0", repeat(i_token(10)) },
|
|
{ "rule1", repeat(i_token(11)) },
|
|
}, {}, {});
|
|
|
|
auto match = expand_repeats(grammar);
|
|
|
|
AssertThat(match.rules, Equals(rule_list({
|
|
{ "rule0", i_aux_sym(0) },
|
|
{ "rule1", i_aux_sym(1) },
|
|
})));
|
|
|
|
AssertThat(match.aux_rules, Equals(rule_list({
|
|
{ "rule0_repeat0", choice({
|
|
seq({ i_token(10), i_aux_sym(0) }),
|
|
blank() }) },
|
|
{ "rule1_repeat0", choice({
|
|
seq({ i_token(11), i_aux_sym(1) }),
|
|
blank() }) },
|
|
})));
|
|
});
|
|
});
|
|
|
|
END_TEST
|