Allow extended #if grammar

[baronfel]

Allow extended #if grammar [6079342]

Submitted by Don Syme on 6/20/2014 12:00:00 AM
6 votes on UserVoice prior to migration

Allow an extended grammar for #if/#elif.

if expr

elif expr

with grammar:
expr =
| expr && expr
| expr || expr
| not expr
| (expr)
| IDENT
With usual precedences. The syntax !IDENT should also be parsed and interpreted as “not”, though a warning given that “not” should be used instead in F# code.
The implementation must also provide sufficient tests.

Response

** by fslang-admin on 1/21/2015 12:00:00 AM **

Completed for F# 4.0+ see dotnet/fsharp#55
Don Syme, F# Language Evolution

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