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digitalmars.D.bugs - [Issue 5015] New: Cyclic import breaks is() in a static if

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           Summary: Cyclic import breaks is() in a static if
           Product: D
           Version: D1
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: regression
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: nyphbl8d gmail.com


--- Comment #0 from William Moore <nyphbl8d gmail.com> 2010-10-07 17:15:11 PDT
---
This issue is nearly identical to Issue 4692 with a minor amount of added
depth.  The test case below breaks 1.064 (but not 2.049):

module breaker;
import breaker;

void main() {}

static if (is(ElemType!(int))){}

template ElemType(T) {
  alias _ElemType!(T).type ElemType;
}

template _ElemType(T) {
    alias r type;
}

As before, this was distilled from the same multi-module cyclic import.  Also
as before, commenting out the cyclic import causes the code to compile as
expected.  This code works properly in 1.060.

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--- Comment #1 from William Moore <nyphbl8d gmail.com> 2010-10-08 12:24:22 PDT
---
This regression is directly related to changeset 632 and 477 just as Issue 4302
was, but I'm not sure what conditions should be applied to ensure the code
takes effect only in the correct circumstances (forcing the if expression to
evaluate to false resovles the bug).

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--- Comment #2 from William Moore <nyphbl8d gmail.com> 2010-12-21 07:13:13 PST
---
This is still broken in the latest 1.066 DMD.  It also still compiles correctly
in 2.051 DMD.

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--- Comment #3 from Iain Buclaw <ibuclaw ubuntu.com> 2010-12-22 13:25:29 PST ---
Created an attachment (id=853)
Patch for 5015

Spotted the difference between D1 and D2 related to this bug report. This can
be seen in changeset 447, and a quick comparison using Meld confirms this:

Attaching patch (merged from D2) which fixes this issue.

Regards

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--- Comment #4 from Iain Buclaw <ibuclaw ubuntu.com> 2010-12-22 13:28:39 PST ---
(In reply to comment #3)
 Created an attachment (id=853) [details]
 Patch for 5015
 
 Spotted the difference between D1 and D2 related to this bug report. This can
 be seen in changeset 447, and a quick comparison using Meld confirms this:
Derp, I meant changeset **477** -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------
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Walter Bright <bugzilla digitalmars.com> changed:

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


--- Comment #5 from Walter Bright <bugzilla digitalmars.com> 2011-01-13
22:36:37 PST ---
http://www.dsource.org/projects/dmd/changeset/874

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