[Issue 5555] Built-in associative arrays in pure nothrow functions

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5555


bearophile_hugs at eml.cc changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|built-in associative        |Built-in associative arrays
                   |array's length is not       |in pure nothrow functions
                   |nothrow                     |


--- Comment #2 from bearophile_hugs at eml.cc 2011-09-18 11:39:35 PDT ---
Currently associative arrays can't be used much in pure nothrow functions:

void main() pure nothrow {
    int[int] aa;
    aa.rehash;
    auto L = aa.length;
    auto x = aa.get(0, 10);
    auto k = aa.keys;
    auto v = aa.values;
    auto bk = aa.byKey();
    auto bv = aa.byValue();
}


DMD 2.055 gives:

test.d(3): Error: pure function 'main' cannot call impure function 'rehash'
test.d(4): Error: pure function 'main' cannot call impure function 'length'
test.d(5): Error: pure function 'main' cannot call impure function 'get'
test.d(6): Error: pure function 'main' cannot call impure function 'keys'
test.d(7): Error: pure function 'main' cannot call impure function 'values'
test.d(8): Error: pure function 'main' cannot call impure function 'byKey'
test.d(9): Error: pure function 'main' cannot call impure function 'byValue'
test.d(3): Error: aa.rehash is not nothrow
test.d(4): Error: aa.length is not nothrow
test.d(5): Error: aa.get is not nothrow
test.d(6): Error: aa.keys is not nothrow
test.d(7): Error: aa.values is not nothrow
test.d(8): Error: aa.byKey is not nothrow
test.d(9): Error: aa.byValue is not nothrow
test.d(1): Error: function D main 'main' is nothrow yet may throw

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