Re: [Haskell-beginners] annoying precedence of unary negate

On 4/28/2014 2:08 AM, Kim-Ee Yeoh wrote:

On Mon, Apr 28, 2014 at 10:59 AM, John M. Dlugosz mailto:ngnr63q02@sneakemail.com> wrote:

Also, is the comma in a list different from the operator comma which is noted as right-associative precedence 5? I had thought that the item separator in the list was special syntax that had very low precedence.

The _colon_ is a non-rebindable special-syntax operator with infixr 5.

Otoh, the _comma_ in a list is _not_ an operator but merely an item separator.

Comma-separated list notation e.g. [1,2,3] is special syntax that desugars to e.g. 1:2:3:[].

Other than that, the colon and comma don't have anything else in common.

-- Kim-Ee

I misread the chart: the “:,++” meant to use the comma to separate two operators, not be one of three operators listed.