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LibCpp: Add support for parsing reference types

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This commit is contained in:
Ali Mohammad Pur 2021-07-28 05:37:24 +04:30 • committed by Andreas Kling
parent 3c1422d774
commit 3319114127
3 changed files with 60 additions and 0 deletions
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23
Userland/Libraries/LibCpp/AST.cpp
View file

@ -100,6 +100,19 @@ String Pointer::to_string() const
return builder.to_string();
}
String Reference::to_string() const
{
if (!m_referenced_type)
return {};
StringBuilder builder;
builder.append(m_referenced_type->to_string());
if (m_kind == Kind::Lvalue)
builder.append("&");
else
builder.append("&&");
return builder.to_string();
}
void Parameter::dump(FILE* output, size_t indent) const
{
ASTNode::dump(output, indent);
@ -359,6 +372,16 @@ void Pointer::dump(FILE* output, size_t indent) const
}
}
void Reference::dump(FILE* output, size_t indent) const
{
ASTNode::dump(output, indent);
print_indent(output, indent + 1);
outln(output, "{}", m_kind == Kind::Lvalue ? "&" : "&&");
if (!m_referenced_type.is_null()) {
m_referenced_type->dump(output, indent + 1);
}
}
void MemberExpression::dump(FILE* output, size_t indent) const
{
ASTNode::dump(output, indent);

27
Userland/Libraries/LibCpp/AST.h
View file

@ -281,6 +281,33 @@ private:
RefPtr<Type> m_pointee;
};
class Reference : public Type {
public:
virtual ~Reference() override = default;
virtual const char* class_name() const override { return "Reference"; }
virtual void dump(FILE* = stdout, size_t indent = 0) const override;
virtual String to_string() const override;
enum class Kind {
Lvalue,
Rvalue,
};
Reference(ASTNode* parent, Optional<Position> start, Optional<Position> end, const String& filename, Kind kind)
: Type(parent, start, end, filename)
, m_kind(kind)
{
}
const Type* referenced_type() const { return m_referenced_type.ptr(); }
void set_referenced_type(RefPtr<Type>&& pointee) { m_referenced_type = move(pointee); }
Kind kind() const { return m_kind; }
private:
RefPtr<Type const> m_referenced_type;
Kind m_kind;
};
class FunctionDefinition : public ASTNode {
public:
virtual ~FunctionDefinition() override = default;

10
Userland/Libraries/LibCpp/Parser.cpp
View file

@ -1237,6 +1237,16 @@ NonnullRefPtr<Type> Parser::parse_type(ASTNode& parent)
type = ptr;
}
if (!eof() && (peek().type() == Token::Type::And || peek().type() == Token::Type::AndAnd)) {
type->set_end(position());
auto ref_token = consume();
auto ref = create_ast_node<Reference>(parent, type->start(), ref_token.end(), ref_token.type() == Token::Type::And ? Reference::Kind::Lvalue : Reference::Kind::Rvalue);
type->set_parent(*ref);
ref->set_referenced_type(type);
ref->set_end(position());
type = ref;
}
type->set_end(position());
return type;
}