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digitalmars.D.bugs - [Issue 3436] New: std.functional.compose with only one function

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=3436

           Summary: std.functional.compose with only one function
           Product: D
           Version: 2.035
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Keywords: patch
          Severity: minor
          Priority: P2
         Component: Phobos
        AssignedTo: nobody puremagic.com
        ReportedBy: dsimcha yahoo.com



import std.functional, std.math;

alias compose!(sqrt) myCompose;


C:\dmd2\windows\bin\..\..\src\phobos\std\functional.d(474): Error: tuple index
0 exceeds 0

Only happens in the degenerate case of only passing one function to compose. 
Not a terribly severe bug, but might be annoying in some metaprogramming cases,
and should ideally be fixed anyhow.

Fix:  Around line 454, check for this as a special case.

static if(fun.length == 1) {
    alias fun[0] doIt;
} else static if (fun.length == 2) {

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Oct 22 2009
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=3436


Andrei Alexandrescu <andrei metalanguage.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|                            |andrei metalanguage.com


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Oct 22 2009
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=3436


David Simcha <dsimcha yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED



Fixed SVN.

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Jun 17 2010