• via Digitalmars-d-bugs (40/40) Nov 06 2015 https://issues.dlang.org/show_bug.cgi?id=15298

via Digitalmars-d-bugs <digitalmars-d-bugs puremagic.com> writes:

https://issues.dlang.org/show_bug.cgi?id=15298

          Issue ID: 15298
           Summary: Can't call nested template function unless it's
                    anonymous
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: thecybershadow gmail.com

///////////////////////// test.d /////////////////////////
// Call alias with a parameter.
void callAlias(alias f)()
{
    f(42);
}

alias Identity(alias X) = X;

void main()
{
    int local;

    // Declare an anonymous function template
    // which writes to a local.
    alias a = Identity!((i) { local = i; });

    // Declare a function template which does
    // the same thing.
    void b(T)(T i) { local = i; }

    callAlias!a; // Works
    callAlias!b; // Error: function test.main.b!int.b is a
                 // nested function and cannot be accessed
                 // from test.callAlias!(b).callAlias
}
//////////////////////////////////////////////////////////

As far as I can tell, a and b are essentially the same, except one is
anonymous.

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