http://d.puremagic.com/issues/show_bug.cgi?id=4539



--- Comment #19 from Andrej Mitrovic <andrej.mitrovich@gmail.com> 2012-01-29 20:51:39 PST ---
(In reply to comment #17)
> void foo(immutable ref string) {}

I'm curious, what does `immutable ref string` buy you compared to just immutable string? Can't the compiler pass by ref automatically if it's an immutable type?

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--- Comment #20 from bearophile_hugs@eml.cc 2012-01-31 17:09:46 PST ---
(In reply to comment #18)

> Yes, it is expected behavior.

I have just seen that some of my code that used to compile now gives a problem. This is a reduced version:


void foo(ref string t) {}
void main() {
    immutable string s;
    foo(s);
}


DMD 2.058head gives:
test.d(4): Error: function test.foo (ref string t) is not callable using
argument types (immutable(char[]))


Is this correct?

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--- Comment #21 from bearophile_hugs@eml.cc 2012-01-31 17:24:32 PST ---
(In reply to comment #20)

> Is this correct?

Yes, it's correct, sorry.

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