[Issue 608] New: Concatenation of const arrays (except strings defined by string literals) is a non-constant expression

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=608

           Summary: Concatenation of const arrays (except strings defined by
                    string literals) is a non-constant expression
           Product: D
           Version: 0.175
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: smjg at iname.com


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//const char[] qwert = "yuiop";
const char[] qwert = [ 'y', 'u', 'i', 'o', 'p' ];
//const char[] qwert = [ 121, 117, 105, 111, 112 ];
const char[] asdfg = qwert;
const char[] hjkl = "" ~ qwert;
const char[] zxcvb = qwert ~ "";
const char[] nm = qwert ~ asdfg;
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const_init_array_1.d(5): Error: non-constant expression "" ~ (qwert)
const_init_array_1.d(6): Error: non-constant expression (qwert) ~ ""
const_init_array_1.d(7): Error: non-constant expression (qwert) ~ (qwert)
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The same happens if line 3 is used instead of line 2.  If line 1 is used, the
code compiles without error.  Using null instead of "" makes no difference.

Similarly:

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const int[] qwert = [ 121, 117, 105, 111, 112 ];
const int[] asdfg = qwert;
const int[] hjkl = null ~ qwert;
const int[] zxvcb = qwert ~ null;
const int[] nm = qwert ~ asdfg;
----------
const_init_array_2.d(3): Error: non-constant expression null ~ (qwert)
const_init_array_2.d(4): Error: non-constant expression (qwert) ~ null
const_init_array_2.d(5): Error: non-constant expression (qwert) ~ (qwert)
----------


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