[Issue 6879] New: The difference of between template matching and IsExp

[d-bugmail]

http://d.puremagic.com/issues/show_bug.cgi?id=6879

           Summary: The difference of between template matching and IsExp
           Product: D
           Version: D2
          Platform: Other
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nob...@puremagic.com
        ReportedBy: k.hara...@gmail.com


--- Comment #0 from Kenji Hara <k.hara...@gmail.com> 2011-11-02 04:57:00 PDT ---
I think following code should compile.

----
private template isStaticArray(T : U[N], U, size_t N)
{
    enum bool isStaticArray = true;
}
private template isStaticArray(T)
{
    enum bool isStaticArray = false;
}

void main()
{
    alias int[3] T;

    enum res1 = isStaticArray!T;

    static if (is(T _ : U[N], U, size_t N))
        enum res2 = true;
    else
        enum res2 = false;

    static assert(res1 == res2);   // fails... Why?
}

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