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LibJS/Parser: Parse let declarations

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0xtechnobabble 2020-03-12 13:16:48 +02:00 • committed by Andreas Kling
parent 4dc1d6654f
commit dc9a702aa8
1 changed files with 16 additions and 2 deletions
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18
Libraries/LibJS/Parser.cpp
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@ -65,6 +65,7 @@ NonnullOwnPtr<Statement> Parser::parse_statement()
case TokenType::Return:
return parse_return_statement();
case TokenType::Var:
case TokenType::Let:
return parse_variable_declaration();
case TokenType::For:
return parse_for_statement();
@ -243,14 +244,27 @@ NonnullOwnPtr<FunctionDeclaration> Parser::parse_function_declaration()
NonnullOwnPtr<VariableDeclaration> Parser::parse_variable_declaration()
{
consume(TokenType::Var);
DeclarationType declaration_type;
switch (m_current_token.type()) {
case TokenType::Var:
declaration_type = DeclarationType::Var;
consume(TokenType::Var);
break;
case TokenType::Let:
declaration_type = DeclarationType::Let;
consume(TokenType::Let);
break;
default:
ASSERT_NOT_REACHED();
}
auto name = consume(TokenType::Identifier).value();
OwnPtr<Expression> initializer;
if (match(TokenType::Equals)) {
consume();
initializer = parse_expression();
}
return make<VariableDeclaration>(make<Identifier>(name), move(initializer), DeclarationType::Var);
return make<VariableDeclaration>(make<Identifier>(name), move(initializer), declaration_type);
}
NonnullOwnPtr<ForStatement> Parser::parse_for_statement()