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🔥 get_metadata function

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This commit is contained in:
Max Brunsfeld 2015-10-30 16:22:25 -07:00
parent 73b3280fbb
commit c8be143f65
9 changed files with 26 additions and 214 deletions
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107
spec/compiler/build_tables/get_metadata_spec.cc
View file

@ -1,107 +0,0 @@
#include "compiler/compiler_spec_helper.h"
#include "compiler/rules/metadata.h"
#include "compiler/build_tables/get_metadata.h"
using namespace rules;
using namespace build_tables;
START_TEST
describe("get_metadata(rule, key)", []() {
MetadataKey key1 = MetadataKey(100);
MetadataKey key2 = MetadataKey(101);
rule_ptr rule;
describe("with a rule without the metadata key", [&]() {
it("returns the zero range", [&]() {
rule = sym("x");
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(0, 0)));
rule = seq({ sym("x"), sym("y") });
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(0, 0)));
rule = metadata(seq({ sym("x"), sym("y") }), {{key2, 5}});
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(0, 0)));
});
});
describe("when given a metadata rule", [&]() {
before_each([&]() {
rule = make_shared<Metadata>(sym("x"), map<MetadataKey, int>({
{ key1, 1 },
{ key2, 2 },
}));
});
it("returns the value for the given key", [&]() {
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(1, 1)));
AssertThat(get_metadata(rule, key2), Equals(MetadataRange(2, 2)));
});
it("returns 0 if the rule does not have the key", [&]() {
AssertThat(get_metadata(rule, MetadataKey(0)), Equals(MetadataRange(0, 0)));
});
describe("when the rule contains another metadata rule", [&]() {
it("also gets metadata from the inner metadata rule", [&]() {
rule = make_shared<Metadata>(make_shared<Metadata>(sym("x"), map<MetadataKey, int>({
{ key1, 1 }
})), map<MetadataKey, int>());
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(1, 1)));
});
});
});
describe("with a sequence starting with a metadata rule", [&]() {
it("returns the metadata rule's value for the key", [&]() {
rule = seq({
metadata(sym("x"), {{key1, 5}}),
sym("y")
});
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(5, 5)));
});
});
describe("with a sequence whose starting value can be blank", [&]() {
it("includes later elements of the sequence in the returned range", [&]() {
rule = seq({
repeat(metadata(sym("x"), {{key1, 3}})),
choice({ metadata(sym("x"), {{key1, 5}}), blank() }),
metadata(sym("x"), {{key1, 7}}),
metadata(sym("x"), {{key1, 9}}),
});
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(3, 7)));
});
});
describe("with a sequence whose starting value can be blank", [&]() {
it("includes later elements of the sequence in the returned range", [&]() {
rule = seq({
repeat(metadata(sym("x"), {{key1, 3}})),
choice({ metadata(sym("x"), {{key1, 5}}), blank() }),
metadata(sym("x"), {{key1, 7}}),
metadata(sym("x"), {{key1, 9}}),
});
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(3, 7)));
});
});
describe("with a choice rule", [&]() {
it("merges the ranges for the choices elements", [&]() {
rule = choice({
metadata(sym("a"), {{key1, 5}}),
metadata(sym("b"), {{key1, 3}}),
sym("c"),
metadata(sym("d"), {{key1, 1}}),
});
AssertThat(get_metadata(rule, key1), Equals(MetadataRange(1, 5)));
});
});
});
END_TEST

6
spec/compiler/helpers/stream_methods.cc
View file

@ -5,7 +5,6 @@
#include "compiler/syntax_grammar.h"
#include "compiler/build_tables/parse_item.h"
#include "compiler/build_tables/lex_item.h"
#include "compiler/build_tables/get_metadata.h"
namespace tree_sitter {
@ -138,11 +137,6 @@ std::ostream &operator<<(std::ostream &stream, const ParseItemSet &item_set) {
return stream << item_set.entries;
}
std::ostream &operator<<(std::ostream &stream, const MetadataRange &range) {
return stream << string("{") << to_string(range.min) << string(", ")
<< to_string(range.max) << string("}");
}
std::ostream &operator<<(std::ostream &stream, const LookaheadSet &set) {
return stream << *set.entries;
}

2
spec/compiler/helpers/stream_methods.h
View file

@ -111,14 +111,12 @@ ostream &operator<<(ostream &, const PrecedenceRange &);
namespace build_tables {
struct MetadataRange;
class LexItem;
class LexItemSet;
class ParseItem;
class ParseItemSet;
class LookaheadSet;
ostream &operator<<(ostream &, const MetadataRange &);
ostream &operator<<(ostream &, const LexItem &);
ostream &operator<<(ostream &, const LexItemSet &);
ostream &operator<<(ostream &, const ParseItem &);