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LibJS: Disallow unqualified deletes in strict mode

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davidot 2021-07-12 01:32:24 +02:00 • committed by Andreas Kling
parent 697882a7ad
commit a6263150be
1 changed files with 8 additions and 2 deletions
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10
Userland/Libraries/LibJS/Parser.cpp
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@ -923,9 +923,15 @@ NonnullRefPtr<Expression> Parser::parse_unary_prefixed_expression()
case TokenType::Void: case TokenType::Void:
consume(); consume();
return create_ast_node<UnaryExpression>({ m_state.current_token.filename(), rule_start.position(), position() }, UnaryOp::Void, parse_expression(precedence, associativity)); return create_ast_node<UnaryExpression>({ m_state.current_token.filename(), rule_start.position(), position() }, UnaryOp::Void, parse_expression(precedence, associativity));
case TokenType::Delete: case TokenType::Delete: {
consume(); consume();
return create_ast_node<UnaryExpression>({ m_state.current_token.filename(), rule_start.position(), position() }, UnaryOp::Delete, parse_expression(precedence, associativity)); auto rhs_start = position();
auto rhs = parse_expression(precedence, associativity);
if (is<Identifier>(*rhs) && m_state.strict_mode) {
syntax_error("Delete of an unqualified identifier in strict mode.", rhs_start);
}
return create_ast_node<UnaryExpression>({ m_state.current_token.filename(), rule_start.position(), position() }, UnaryOp::Delete, move(rhs));
}
default: default:
expected("primary expression"); expected("primary expression");
consume(); consume();