November 09, 2011 immutable & alias this | ||||
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I find typedef useful still. While trying to create a poor's man typedef using a struct with alis this, I have found this problem: struct Typedef(T) { T data; alias data this; } alias int[] TA1; typedef int[] TA2; alias Typedef!(int[]) TA3; immutable TA1 a1; immutable TA2 a2; TA3 a3a; immutable TA3 a3b; static this() { a1 = [1, 2, 3]; // OK a2 = [1, 2, 3]; // OK a3a = [1, 2, 3]; // OK a3b = [1, 2, 3]; // line 16, error } void main() {} DMD 2.057beta gives: test.d(16): Error: cannot implicitly convert expression ([1,2,3]) of type int[] to immutable(Typedef!(int[])) What do you think? Bye, bearophile |
November 09, 2011 Re: immutable & alias this | ||||
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Posted in reply to bearophile | > test.d(16): Error: cannot implicitly convert expression ([1,2,3]) of type int[] to immutable(Typedef!(int[])) OT: this shows another possible problem. See http://clang.llvm.org/diagnostics.html, section "Typedef Preservation and Selective Unwrapping" |
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