Parameterized Keywords

[Patience via Digitalmars-d]

Just curious if anyone can see the use for them?

e.g., for[32], switch[alpha] //alpha is a user type, if[x](x < 32)
etc..

The idea is two-fold, one is to allow polymorphic keyword 
behavior(it's behavior depends on the argument) and to allow the 
code itself to manipulate the behavior.

Of course, the behavior isn't easily define for the above 
examples. So far all I can think of is various simple 
modifications:

foreach[?] <- executes only if there are one or more iterations 
and checks for nullity. This allow one to avoid writing the if 
check.

int[size] <- creates an integer of size bits.

etc...

I can't see much benefit but maybe someone has some good uses?

These could be thought of as "attributes for keywords". The 
programmer would have to define precisely what if[x] means.

Obviously the biggest objection is "It will obfuscate 
keywords"... Please don't obfuscate the question with such 
responses.