Thread overview
[Issue 4097] New: Error: can only declare type aliases within static if conditionals
Apr 16, 2010
nfxjfg@gmail.com
Jan 07, 2011
nfxjfg@gmail.com
Jan 07, 2011
Brad Roberts
Apr 07, 2011
Walter Bright
April 16, 2010
http://d.puremagic.com/issues/show_bug.cgi?id=4097

           Summary: Error: can only declare type aliases within static if
                    conditionals
           Product: D
           Version: future
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody@puremagic.com
        ReportedBy: nfxjfg@gmail.com


--- Comment #0 from nfxjfg@gmail.com 2010-04-16 09:03:52 PDT ---
Look at this code:

----------------
void foo() { }
alias typeof(&foo) T;

// works
static if (is(T X : X*) && is(X == function)) {} else { static assert(false); }

// doesn't work
// Error: can only declare type aliases within static if conditionals
static assert(is(T X : X*) && is(X == function));
----------------

This looks really silly. Couldn't that restriction be lifted? The alias would be only valid within the expression and wouldn't require a static if.

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January 07, 2011
http://d.puremagic.com/issues/show_bug.cgi?id=4097


nfxjfg@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID


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Brad Roberts <braddr@puremagic.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
                 CC|                            |braddr@puremagic.com
         Resolution|INVALID                     |


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Walter Bright <bugzilla@digitalmars.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
                 CC|                            |bugzilla@digitalmars.com
            Version|future                      |D2
         Resolution|                            |FIXED


--- Comment #1 from Walter Bright <bugzilla@digitalmars.com> 2011-04-07 15:49:33 PDT ---
I think you're right.

https://github.com/D-Programming-Language/dmd/commit/7588ca35c5e723a8fccfbfc1db684114aa1e29aa

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