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LibJS: Implement nullish coalescing operator (??)

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This commit is contained in:
Linus Groh
2020-04-18 00:49:11 +01:00
committed by Andreas Kling
parent 1806592d58
commit d14ddb6461
4 changed files with 60 additions and 12 deletions
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6
Libraries/LibJS/Parser.cpp
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@@ -601,6 +601,9 @@ NonnullRefPtr<Expression> Parser::parse_secondary_expression(NonnullRefPtr<Expre
case TokenType::DoublePipe:
consume();
return create_ast_node<LogicalExpression>(LogicalOp::Or, move(lhs), parse_expression(min_precedence, associativity));
case TokenType::DoubleQuestionMark:
consume();
return create_ast_node<LogicalExpression>(LogicalOp::NullishCoalescing, move(lhs), parse_expression(min_precedence, associativity));
case TokenType::QuestionMark:
return parse_conditional_expression(move(lhs));
default:
@@ -1039,7 +1042,8 @@ bool Parser::match_secondary_expression() const
|| type == TokenType::Pipe
|| type == TokenType::Caret
|| type == TokenType::DoubleAmpersand
|| type == TokenType::DoublePipe;
|| type == TokenType::DoublePipe
|| type == TokenType::DoubleQuestionMark;
}
bool Parser::match_statement() const