RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-26 05:17:34 +00:00
Code Issues Activity Actions

JSSpecCompiler: Parse true, false, this, undefined, and null

Browse source
This commit is contained in:
Dan Klishch 2024-01-20 21:41:38 -05:00 • committed by Andrew Kaster
parent 86d54a8684
commit b800276347
7 changed files with 70 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Parser/Lexer.cpp
View file

@ -158,8 +158,8 @@ void tokenize_tree(SpecificationParsingContext& ctx, TokenizerState& state, XML:
if (contents.length() >= 2 && contents.starts_with('"') && contents.ends_with('"'))
tokens.append({ TokenType::String, contents.substring_view(1, contents.length() - 2), move(child_location) });
else if (contents == "undefined")
tokens.append({ TokenType::Undefined, contents, move(child_location) });
else if (contents.is_one_of("undefined", "null", "this", "true", "false"))
tokens.append({ TokenType::WellKnownValue, contents, move(child_location) });
else
tokens.append({ TokenType::Identifier, contents, move(child_location) });
return;

18
Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Parser/TextParser.cpp
View file

@ -298,6 +298,24 @@ TextParseErrorOr<Tree> TextParser::parse_expression()
NullableTree expression;
if (token.type == TokenType::Identifier) {
expression = make_ref_counted<UnresolvedReference>(token.data);
} else if (token.type == TokenType::WellKnownValue) {
static constexpr struct {
StringView name;
WellKnownNode::Type type;
} translations[] = {
{ "false"sv, WellKnownNode::Type::False },
{ "null"sv, WellKnownNode::Type::Null },
{ "this"sv, WellKnownNode::Type::This },
{ "true"sv, WellKnownNode::Type::True },
{ "undefined"sv, WellKnownNode::Type::Undefined },
};
for (auto [name, type] : translations) {
if (token.data == name) {
expression = make_ref_counted<WellKnownNode>(type);
break;
}
}
VERIFY(expression);
} else if (token.type == TokenType::Number) {
expression = make_ref_counted<MathematicalConstant>(MUST(Crypto::BigFraction::from_string(token.data)));
} else if (token.type == TokenType::String) {

2
Meta/Lagom/Tools/CodeGenerators/JSSpecCompiler/Parser/Token.h
View file

@ -48,7 +48,7 @@ constexpr i32 closing_bracket_precedence = 18;
F(String, -1, Invalid, Invalid, Invalid, "string literal") \
F(Superscript, 4, Invalid, Power, Invalid, "subscript") \
F(UnaryMinus, 3, Minus, Invalid, Invalid, "unary minus") \
F(Undefined, -1, Invalid, Invalid, Invalid, "constant") \
F(WellKnownValue, -1, Invalid, Invalid, Invalid, "constant") \
F(Word, -1, Invalid, Invalid, Invalid, "word")
enum class TokenType {