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LibJS: Multiple 'default' clauses in switch statement are a syntax error

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Linus Groh 2020-10-18 23:12:27 +01:00 • committed by Andreas Kling
parent 57e7b2f8e4
commit 2dbea60fe2
2 changed files with 16 additions and 1 deletions
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9
Libraries/LibJS/Parser.cpp
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@ -1519,8 +1519,15 @@ NonnullRefPtr<SwitchStatement> Parser::parse_switch_statement()
NonnullRefPtrVector<SwitchCase> cases;
while (match(TokenType::Case) || match(TokenType::Default))
auto has_default = false;
while (match(TokenType::Case) || match(TokenType::Default)) {
if (match(TokenType::Default)) {
if (has_default)
syntax_error("Multiple 'default' clauses in switch statement");
has_default = true;
}
cases.append(parse_switch_case());
}
consume(TokenType::CurlyClose);