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Name refactoring

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This commit is contained in:
yhirose 2018-07-20 22:56:13 -04:00
parent 9980eea1cd
commit 9c3da8d6af
3 changed files with 36 additions and 15 deletions
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28
README.md
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@ -17,7 +17,7 @@ The PEG syntax is well described on page 2 in the [document](http://www.brynosau
* `$name` (Backreference operator)
* `%whitespace` (Automatic whitespace skipping)
* `%word` (Word expression)
* `$name(` ... `)` (Create capture scope)
* `$name(` ... `)` (Capture scope operator)
* `$name<` ... `>` (Named capture operator)
* `$name` (Backreference operator)
@ -261,8 +261,28 @@ peg::parser parser(R"(
%word <- [a-z]+
)");
parser.parse("hello world") // OK
parser.parse("helloworld") // NG
parser.parse("hello world"); // OK
parser.parse("helloworld"); // NG
```
Capture/Backreference
---------------------
```cpp
peg::parser parser(R"(
ROOT <- CONTENT
CONTENT <- (ELEMENT / TEXT)*
ELEMENT <- $(STAG CONTENT ETAG)
STAG <- '<' $tag< TAG_NAME > '>'
ETAG <- '</' $tag '>'
TAG_NAME <- 'b' / 'u'
TEXT <- TEXT_DATA
TEXT_DATA <- ![<] .
)");
parser.parse("This is <b>a <u>test</u> text</b>."); // OK
parser.parse("This is <b>a <u>test</b> text</u>."); // NG
parser.parse("This is <b>a <u>test text</b>."); // NG
```
AST generation
@ -326,7 +346,7 @@ The following are available operators:
| dot | Any character |
| tok | Token boundary |
| ign | Ignore semantic value |
| ncs | New capture scope |
| csc | Capture scope |
| cap | Capture |
| bkr | Back reference |

22
peglib.h
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@ -1032,10 +1032,10 @@ public:
void accept(Visitor& v) override;
};
class NewCaptureScope : public Ope
class CaptureScope : public Ope
{
public:
NewCaptureScope(const std::shared_ptr<Ope>& ope)
CaptureScope(const std::shared_ptr<Ope>& ope)
: ope_(ope) {}
size_t parse(const char* s, size_t n, SemanticValues& sv, Context& c, any& dt) const override {
@ -1219,7 +1219,7 @@ struct Ope::Visitor
virtual void visit(CharacterClass& /*ope*/) {}
virtual void visit(Character& /*ope*/) {}
virtual void visit(AnyCharacter& /*ope*/) {}
virtual void visit(NewCaptureScope& /*ope*/) {}
virtual void visit(CaptureScope& /*ope*/) {}
virtual void visit(Capture& /*ope*/) {}
virtual void visit(TokenBoundary& /*ope*/) {}
virtual void visit(Ignore& /*ope*/) {}
@ -1249,7 +1249,7 @@ struct AssignIDToDefinition : public Ope::Visitor
void visit(Option& ope) override { ope.ope_->accept(*this); }
void visit(AndPredicate& ope) override { ope.ope_->accept(*this); }
void visit(NotPredicate& ope) override { ope.ope_->accept(*this); }
void visit(NewCaptureScope& ope) override { ope.ope_->accept(*this); }
void visit(CaptureScope& ope) override { ope.ope_->accept(*this); }
void visit(Capture& ope) override { ope.ope_->accept(*this); }
void visit(TokenBoundary& ope) override { ope.ope_->accept(*this); }
void visit(Ignore& ope) override { ope.ope_->accept(*this); }
@ -1279,7 +1279,7 @@ struct IsToken : public Ope::Visitor
void visit(ZeroOrMore& ope) override { ope.ope_->accept(*this); }
void visit(OneOrMore& ope) override { ope.ope_->accept(*this); }
void visit(Option& ope) override { ope.ope_->accept(*this); }
void visit(NewCaptureScope& ope) override { ope.ope_->accept(*this); }
void visit(CaptureScope& ope) override { ope.ope_->accept(*this); }
void visit(Capture& ope) override { ope.ope_->accept(*this); }
void visit(TokenBoundary& /*ope*/) override { has_token_boundary = true; }
void visit(Ignore& ope) override { ope.ope_->accept(*this); }
@ -1677,7 +1677,7 @@ inline void LiteralString::accept(Visitor& v) { v.visit(*this); }
inline void CharacterClass::accept(Visitor& v) { v.visit(*this); }
inline void Character::accept(Visitor& v) { v.visit(*this); }
inline void AnyCharacter::accept(Visitor& v) { v.visit(*this); }
inline void NewCaptureScope::accept(Visitor& v) { v.visit(*this); }
inline void CaptureScope::accept(Visitor& v) { v.visit(*this); }
inline void Capture::accept(Visitor& v) { v.visit(*this); }
inline void TokenBoundary::accept(Visitor& v) { v.visit(*this); }
inline void Ignore::accept(Visitor& v) { v.visit(*this); }
@ -1747,8 +1747,8 @@ inline std::shared_ptr<Ope> dot() {
return std::make_shared<AnyCharacter>();
}
inline std::shared_ptr<Ope> ncs(const std::shared_ptr<Ope>& ope) {
return std::make_shared<NewCaptureScope>(ope);
inline std::shared_ptr<Ope> csc(const std::shared_ptr<Ope>& ope) {
return std::make_shared<CaptureScope>(ope);
}
inline std::shared_ptr<Ope> cap(const std::shared_ptr<Ope>& ope, Capture::MatchAction ma) {
@ -1877,7 +1877,7 @@ private:
void visit(AnyCharacter& /*ope*/) override {
done_ = true;
}
void visit(NewCaptureScope& ope) override {
void visit(CaptureScope& ope) override {
ope.ope_->accept(*this);
}
void visit(Capture& ope) override {
@ -2102,8 +2102,8 @@ private:
case 2: { // TokenBoundary
return tok(sv[1].get<std::shared_ptr<Ope>>());
}
case 3: { // NewCaptureScope
return ncs(sv[1].get<std::shared_ptr<Ope>>());
case 3: { // CaptureScope
return csc(sv[1].get<std::shared_ptr<Ope>>());
}
case 4: { // Capture
const auto& name = sv[0].get<std::string>();

1
test/test.cc
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@ -789,6 +789,7 @@ TEST_CASE("Nested capture test", "[backreference]")
REQUIRE(parser.parse("This is <b>a <u>test</u> text</b>."));
REQUIRE(!parser.parse("This is <b>a <u>test</b> text</u>."));
REQUIRE(!parser.parse("This is <b>a <u>test text</b>."));
REQUIRE(!parser.parse("This is a <u>test</u> text</b>."));
}
TEST_CASE("Backreference with Prioritized Choice test", "[backreference]")