mirror of
https://github.com/RGBCube/serenity
synced 2025-07-25 03:37:34 +00:00
dca9e4ec10
- A regular function can have duplicate parameters except in strict mode
or if its parameter list is not "simple" (has a default or rest
parameter)
- An arrow function can never have duplicate parameters
Compared to other engines I opted for more useful syntax error messages
than a generic "duplicate parameter name not allowed in this context":
"use strict"; function test(foo, foo) {}
^
Uncaught exception: [SyntaxError]: Duplicate parameter 'foo' not allowed in strict mode (line: 1, column: 34)
function test(foo, foo = 1) {}
^
Uncaught exception: [SyntaxError]: Duplicate parameter 'foo' not allowed in function with default parameter (line: 1, column: 20)
function test(foo, ...foo) {}
^
Uncaught exception: [SyntaxError]: Duplicate parameter 'foo' not allowed in function with rest parameter (line: 1, column: 23)
(foo, foo) => {}
^
Uncaught exception: [SyntaxError]: Duplicate parameter 'foo' not allowed in arrow function (line: 1, column: 7)
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| .. | ||
| Heap | ||
| Runtime | ||
| Tests | ||
| AST.cpp | ||
| AST.h | ||
| CMakeLists.txt | ||
| Console.cpp | ||
| Console.h | ||
| Forward.h | ||
| Interpreter.cpp | ||
| Interpreter.h | ||
| Lexer.cpp | ||
| Lexer.h | ||
| MarkupGenerator.cpp | ||
| MarkupGenerator.h | ||
| Parser.cpp | ||
| Parser.h | ||
| Token.cpp | ||
| Token.h | ||