[Issue 353] New: null passed as a char[] template argument, concatenated with a string literal, is a non-constant expression

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=353

           Summary: null passed as a char[] template argument, concatenated
                    with a string literal, is a non-constant expression
           Product: D
           Version: 0.166
          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


----------
template Qwert(char[] yuiop) {
    const char[] Qwert = yuiop ~ "asdfg";
}

void main() {
    char[] hjkl = Qwert!(null);
}
----------
D:\My Documents\Programming\D\Tests\bugs\string_template7.d(2): non-constant
expression null ~ "asdfg"
----------

No such error occurs if null is replaced by a string literal, or if line 2 is
changed to

    const char[] Qwert = yuiop;

If, starting with the original code, hjkl is declared at module level, the
error is doubled:

----------
template Qwert(char[] yuiop) {
    const char[] Qwert = yuiop ~ "asdfg";
}

char[] hjkl = Qwert!(null);
----------
D:\My Documents\Programming\D\Tests\bugs\string_template7a.d(5): non-constant
expression null ~ "asdfg"
D:\My Documents\Programming\D\Tests\bugs\string_template7a.d(2): non-constant
expression null ~ "asdfg"
----------

If hjkl is declared as const and at module level, then the error is tripled (at
lines 5, 2 and 2).


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