[Issue 6484] New: compose can't take multi arg functions

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6484

           Summary: compose can't take multi arg functions
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: ellery-newcomer at utulsa.edu


--- Comment #0 from Ellery Newcomer <ellery-newcomer at utulsa.edu> 2011-08-12 13:17:24 PDT ---
unless only passed one function.

Of course, this doesn't make sense for any but the innermost function, e.g.

int f(int){..} 
int g(int){..}
int h(int,int,int){...}

alias compose!(f,g,h) F;
assert(F(x,y,z) == f(g(h(x,y,z))));

This functionality can be trivially added by changing in composeImpl

doIt(E)(E a)

to 

doIt(E...)(E a)

If conserving param modifiers is desired, it would likely take a good deal more
work.

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