[Issue 8408] Purity calculation should be improved

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8408



--- Comment #6 from bearophile_hugs at eml.cc 2012-12-05 17:36:09 PST ---
Is it correct that x1 refused and x2 accepted?


char[] foo1(int[] arr) pure {
    return new char[10];
}
immutable(char)[] foo2(int[] arr) pure {
    return new char[10];
}
void main(string[] args) {
    immutable x1 = foo1([1, 2]); // Error: cannot implicitly convert
    immutable x2 = foo2([1, 2]); // OK
}

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