www.digitalmars.com         C & C++   DMDScript  

digitalmars.D.bugs - [Issue 2849] New: Length of a local immutable(char[]) cannot be a template value argument

http://d.puremagic.com/issues/show_bug.cgi?id=2849

           Summary: Length of a local immutable(char[]) cannot be a
                    template value argument
           Product: D
           Version: 2.027
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: clugdbug yahoo.com.au


struct bar(int n){}
void main(){
immutable(char[]) x = "bug";
bar!(x.length) z;
}
-----
fog.d(3): Error: expression (x = "bug").length is not a valid template value
arg
ument
fog.d(4): Error: template instance fog.bar!((x = "bug").length) error
instantiat
ing
==========
Yet here are two very similar cases which work:

struct bar(int n){}
immutable(char[]) x1 = "bug";
void main(){
 immutable(char[]) x2 = "bug";
 enum q= x2.length;
 bar!(x1.length) z; // ok, it's a global
 bar!(q) z2; //ok, it's been copied to an enum
}


Probably related to issue #2841 and issue #2414.


--
Apr 17 2009