X +Y gets compiled to X(+Y)

[Kambis]

Some expression of the type X +Y like
Math.sqrt(2) +Math.sqrt(3)
with a space before the + but not after get compiled to
Math.sqrt(2)(+Math.sqrt(3));
which are not meaningful.

[vendethiel]

Which is expected in a whitespace-sensitive language.

[Kambis]

According to which grammar rule? And why should Math.sqrt(2) +Math.sqrt(3) get compiled like that while 2 +Math.sqrt(2) gets compiled in a different way?

[vendethiel]

Grammar rule ? Implicit call. And 2 isn't callable so there's no possible mistake.

[Kambis]

The grammar is here:
http://coffeescript.org/documentation/docs/grammar.html

[vendethiel]

Yes, but implicit calls are rewritten before

[Kambis]

OK, thanks. So +/- are parsed as unary operator without the space.

[michaelficarra]

@Kambis: please read the duplicates that came before this. Also, x(+y) is far from useless.

[jashkenas]

To be more specific ... It's useful to keep the consistency for things like this:

print -100

callback -(sin(a) + cos(b))

... and so on.