Lexer: SyntaxError: unexpected nonexistent `(`

[1j01]

When missing a comma in an object literal, you get SyntaxError: unexpected ( even though there's no parentheses.

console.log {search, users, contacts users_to_display}

From what I know of how CoffeeScript works, it's inserting a parenthesis for a function call to contacts making for the terrible error message.
(So I ended up looking for an extra parenthesis somewhere in some file.)

This is fixed in redux. Is there a path for fixing problems like this that come from the rewriter?

[lydell]

$ node -p 'require("coffee-script").tokens("{f a}")'
[ [ '{',
    '{',
    { first_line: 0, first_column: 0, last_line: 0, last_column: 0 } ],
  [ 'IDENTIFIER',
    'f',
    { first_line: 0, first_column: 1, last_line: 0, last_column: 1 },
    variable: true,
    spaced: true ],
  [ 'CALL_START',
    '(',
    { first_line: 0, first_column: 1, last_line: 0, last_column: 1 },
    generated: true ],
  [ 'IDENTIFIER',
    'a',
    { first_line: 0, first_column: 3, last_line: 0, last_column: 3 },
    variable: true ],
  [ 'CALL_END',
    ')',
    { first_line: 0, first_column: 3, last_line: 0, last_column: 3 },
    generated: true,
    origin: [ '', 'end of input', [Object] ] ],
  [ '}',
    '}',
    { first_line: 0, first_column: 4, last_line: 0, last_column: 4 } ],
  [ 'TERMINATOR',
    '\n',
    { first_line: 0, first_column: 5, last_line: 0, last_column: 5 } ] ]

The generate: true bit tells us that the ( has been generated by CoffeeScript, by the rewriter.

My guess is that the token comes from here. Passing the origin parameter to the generate function on that line (just like it is done a few lines further down) might be the solution.

[anodynos]

This code console.log {search, users, contacts users_to_display} isnt valid - what would it transpile to console.log({search: search, users: users, ?????}); ?

The console.log {search, users, contacts: contacts users_to_display} works as expected.

[1j01]

@anodynos Yes, the code has a syntax error. The issue is with the error message.
The correct code would be console.log {search, users, contacts, users_to_display} (a very useful pattern when logging several things)

[vendethiel]

@lydell yes, that seems to be the solution

[yyny]

@1j01 The error message actually comes from CoffeeScript right, not the compiled JavaScript? (For anyone not able to test it themselves, if this issue is still not fixed)

[1j01]

@YoYoYonnY Yes, it's from CoffeeScript.

C:\Users\Isaiah>coffee -v
CoffeeScript version 1.11.1

C:\Users\Isaiah>coffee -e "console.log {search, users, contacts users_to_display}"
[stdin]:1:36: error: unexpected (
console.log {search, users, contacts users_to_display}
                                   ^