[Issue 6982] immutability isn't respected on associative array assignment

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6982


bearophile_hugs at eml.cc changed:

           What    |Removed                     |Added
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                 CC|                            |bearophile_hugs at eml.cc


--- Comment #6 from bearophile_hugs at eml.cc 2011-12-18 07:39:16 PST ---
A related problem (I think I have already put this in Bugzilla, but I don't
remember the issue number):


void main() {
    int[char[]] aa; // line 2
    char[] a1 = "hello".dup;
    aa[a1] = 1; // line 4
}


It's stupid for D language to accept the line 2 and then refuse line 4 with:

test.d(4): Error: associative arrays can only be assigned values with immutable
keys, not char[]

Line 2 too needs to become an error.

So a better error message is something like:

test.d(2): Error: built-in associative arrays accept only immutable keys, not
char[]

Or alternatively:

test.d(2): Error: built-in associative arrays can be defined only with
immutable keys, not char[]

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