Re: Permitting trailing commas for record syntax ADT declarations

On Tue, Sep 23, 2014 at 10:03:11AM +0200, Johan Tibell wrote:

I must say that requiring a language pragma makes the feature quite a bit more heavy weight. We're not changing the meaning of any existing programs, just allowing some new ones.

Without using a new language pragma you will get more or less telling error messages if you're trying to compile code using this new syntax with older ghcs. Using a new language pragma will give you quite telling error messages. Greetings, Daniel