[erlang-questions] How about a new warning? Was: Re: trouble with erlang or erlang is a ghetto

Ulf Wiger <>
Wed Aug 3 19:05:26 CEST 2011


According to the Barklund spec (page 62), it said that "a compiler must only accept a program if for any evaluation order, there will not be an applied occurrence of an unbound variable".

"For example, in a context where X is unbound, the expression (X=8) + X should give a compile-time error."

(And it does, too. I checked).

BR,
Ulf W

On 3 Aug 2011, at 18:17, Richard Carlsson wrote:

>> And did it extend to pattern matching?
> 
> No, there was never any discussion about that. If the match succeeds then it would succeed no matter what the order, and if a you get a 'badmatch' error, the entire matched term is blamed, not just the first subterm that doesn't match, so I can't see that there would be any observable difference depending on the order of matched subterms.

Ulf Wiger, CTO, Erlang Solutions, Ltd.
http://erlang-solutions.com






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