[Issue 7554] Immutable function pointer arguments too

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7554



--- Comment #1 from Kenji Hara <k.hara.pg at gmail.com> 2012-02-26 08:23:38 PST ---
I think making inner() pure isn't necessary.
Following raises no error and works as expected.

T outer(T)(T function(in T) pure foo) pure {
     int inner() {
         return foo(5);
     }
     return inner();
}
int sqr(in int x) pure {
     return x * x;
}
void main() {
     assert(outer(&sqr) == 25);
}

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