[Issue 9065] Please consider adding these std.traits

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=9065

Rory <rjmcguire at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |rjmcguire at gmail.com

--- Comment #52 from Rory <rjmcguire at gmail.com> ---
(In reply to Manu from comment #11)

> template isEnum( T )
> {
> 	enum isEnum = is( T == enum );
> }
> 
> // test if something is a variable; has a value, has an address
> template isVariable( alias T )
> {
> 	enum isVariable = !is( T ) && is( typeof( T ) )	// if it is not a type, and
> does have a type, it starts to look like a variable
> 		&& !isFunction!T							// reject function definitions, they can't be
> assigned to
> 		&& !isEnum!T								// reject enum's
> 		&& !is( typeof( T ) == void );				// reject modules, which appear as a
> variable of type 'void'
> }


Thanks for this, I used this in Adam's jsvar to get a more meaningful
conversion from enum to bool which was initially causing the module to not be
valid because isIntegral!(some enum) == true.

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