coffeelint/src/rules/no_implicit_parens.coffee

Lint your CoffeeScript

module.exports = class NoImplicitParens

    rule:
        name: 'no_implicit_parens'
        strict : true
        level : 'ignore'
        message : 'Implicit parens are forbidden'
        description: """
            This rule prohibits implicit parens on function calls.
            <pre>
            <code># Some folks don't like this style of coding.
            myFunction a, b, c

            # And would rather it always be written like this:
            myFunction(a, b, c)
            </code>
            </pre>
            Implicit parens are permitted by default, since their use is
            idiomatic CoffeeScript.
            """


    tokens: ['CALL_END']

    lintToken : (token, tokenApi) ->
        if token.generated
            unless tokenApi.config[@rule.name].strict is false
                return true
            else
                # If strict mode is turned off it allows implicit parens when
                # the expression is spread over multiple lines.
                i = -1
                loop
                    t = tokenApi.peek(i)

                    if not t? or (t[0] is 'CALL_START' and t.generated)
                        return true

                    # If we have not found a CALL_START token that is generated,
                    # and we've moved into a new line, this is fine and should
                    # just return.
                    if t[2].first_line isnt token[2].first_line
                        return null

                    i -= 1