• d-bugmail puremagic.com (55/55) Sep 13 2012 http://d.puremagic.com/issues/show_bug.cgi?id=8654

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=8654

           Summary: cannot take address of function which is 1)overloaded,
                    2) templated, and 3) member (static or not): Error:
                    xxx is not an lvalue
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody puremagic.com
        ReportedBy: thelastmammoth gmail.com


--- Comment #0 from thelastmammoth gmail.com 2012-09-13 17:58:46 PDT ---
here's my other weird example, which I managed to simplify to as follows.
Basically if:
1) the function is overloaded, and
2) it is a template, and
3) it is a member function (either static or nonstatic)

Then you get  a CT error that looks like: Error: (A).fun!(2) is not an lvalue


That's a bug too right? (but different!)

I wish delegates were more 1st class citizens and behaved...

----
void run(Fun)(Fun fun){
}

class A {
    void fun1(int T)() if(T==2) {    }

    void fun2(int T)() if(T==1) {    }
    void fun2(int T)() if(T==2) {    }

    void fun3(){}
    void fun3(int x){}

    void fun4(int T)() if(T==1) {    }
    void fun4(int T)(int x) if(T==2) {    }

    void fun5(T)()  {    }
    void fun5(T)(int x)  {    }

    static void fun6(int T)() if(T==1) {    }
    static void fun6(int T)() if(T==2) {    }
}

void fun7(int T)() if(T==1) {    }
void fun7(int T)() if(T==2) {    }



void main(){
    auto a=new A;
    run(&a.fun1!2); //works
    //run(&a.fun2!2); //CT Error: a.fun2!(2) is not an lvalue
    run(&a.fun3); //works
    //run(&a.fun4!2); //CT Error: a.fun4!(2) is not an lvalue
    //run(&a.fun5!double); //CT Error: a.fun5!(double) is not an lvalue
    //run(&A.fun6!2); //CT Error: (A).fun6!(2) is not an lvalue
    run(&fun7!2); //works
}
----

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