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digitalmars.D.bugs - [Issue 6891] New: template with uint value parameter causes several issues

reply d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6891

           Summary: template with uint value parameter causes several
                    issues
           Product: D
           Version: D2
          Platform: x86_64
        OS/Version: Linux
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: revcompgeek gmail.com


--- Comment #0 from Matt Peterson <revcompgeek gmail.com> 2011-11-04 16:31:32
PDT ---
This bug is closely related to issue 4960 and issue 6745, although I don't
think it's an exact duplicate.

One of the simplest test cases I could come up with:
----
struct S(uint N) {
    void f(S!N u) { }
}

alias S!1 A;

void main()
{
    A().f(A());
}
----

Which gives the following error messages:
templatetest.d(10): Error: function templatetest.S!(1).S.f (S!(N) u) is not
callable using argument types (S!(1))
templatetest.d(10): Error: cannot implicitly convert expression (S()) of type
S!(1) to S!(N)

In this form it is fairly easy to work around, by either changing uint to int
in the struct declaration or using S!1u instead of S!1. However, I derived this
from a slightly different test case:
----
struct S(int N, T) {
    void f(U)(S!(N, U) u) { }
}

alias S!(1, void) A;

void main()
{
    A().f(A());
}
----

Which gives me these error messages:
templatetest.d(10): Error: template templatetest.S!(1,void).S.f(U) does not
match any function template declaration
templatetest.d(10): Error: template templatetest.S!(1,void).S.f(U) cannot
deduce template function from argument types !()(S!(1,void))

In this version, changing the type of N or 1 doesn't do anything, and I have
not found a way to work around it.

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next sibling parent d-bugmail puremagic.com writes:
http://d.puremagic.com/issues/show_bug.cgi?id=6891


SomeDude <lovelydear mailmetrash.com> changed:

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


--- Comment #1 from SomeDude <lovelydear mailmetrash.com> 2012-05-01 15:51:12
PDT ---
The first case compiles with 2.059, not the second.

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prev sibling next sibling parent d-bugmail puremagic.com writes:
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Kenji Hara <k.hara.pg gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |pull, rejects-valid
           Platform|x86_64                      |All
         OS/Version|Linux                       |All


--- Comment #2 from Kenji Hara <k.hara.pg gmail.com> 2012-05-01 23:12:33 PDT ---
First case may be a dup of bug 3467.

I've posted a pull request for the second case:
https://github.com/D-Programming-Language/dmd/pull/919

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--- Comment #3 from github-bugzilla puremagic.com 2012-05-02 14:35:17 PDT ---
Commits pushed to master at https://github.com/D-Programming-Language/dmd

https://github.com/D-Programming-Language/dmd/commit/48a8e64bd0181a847098cf7de2baf4945ff6ecac
fix Issue 6891 - template with uint value parameter causes several issues

https://github.com/D-Programming-Language/dmd/commit/6dd100055be1fe13d3594213a72a04c7ecff44b2
Merge pull request #919 from 9rnsr/fix6891

Issue 6891 - template with uint value parameter causes several issues

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prev sibling parent d-bugmail puremagic.com writes:
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Walter Bright <bugzilla digitalmars.com> changed:

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


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