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digitalmars.D.bugs - [Issue 5437] New: Problems with length of std.traits.EnumMembers

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=5437

           Summary: Problems with length of std.traits.EnumMembers
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: bearophile_hugs eml.cc



A D2 program:

import std.traits: EnumMembers;
enum Foo { A, B }
void main() {
    alias EnumMembers!Foo members; // OK
    enum n1 = members.length; // OK
    enum n2 = (EnumMembers!Foo).length; // line 6, Error
}


DMD 2.051 shows the error:
test.d(6): Error: EnumMembers!(Foo) is used as a type

------------------------

A similar program:

import std.traits: EnumMembers;
enum Foo { A, B }
void main() {
    alias EnumMembers!Foo members;
    enum n = members.length; // OK
    int[n] data1; // OK
    int[members.length] data2; // line 7, ERROR
}


DMD 2.051 shows the errors:
test.d(7): Error: identifier 'length' of 'members.length' is not defined
test.d(7): Error: index is not a type or an expression

I have add a "DMD" tag for the Component of this bug because I am not sure
about the cause.

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Jan 09 2011
next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=5437


SomeDude <lovelydear mailmetrash.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |lovelydear mailmetrash.com



PDT ---
For the first one, I think you can't ask for the length of members of the
struct before it has finished instantiating templates. So I don't find the
first one surprising.
The compiler tells you that a template that has not been instantiated is not a
type.

The second one compiles fine on 2.059.

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Apr 22 2012
prev sibling next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=5437




Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/b378fb830983025d65582b2a57fc92f2d432ae87
fix Issue 5437 - Problems with length of std.traits.EnumMembers

https://github.com/D-Programming-Language/dmd/commit/8a0d1309b7fb7d3e793735762901f8a9c99cd4f8


Issue 5437 - Problems with length of std.traits.EnumMembers

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Apr 22 2012
prev sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=5437


Walter Bright <bugzilla digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bugzilla digitalmars.com
         Resolution|                            |FIXED


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Apr 23 2012