[Issue 16467] New: templated function default argument take into account when not needed

via Digitalmars-d-bugs digitalmars-d-bugs at puremagic.com
Mon Sep 5 05:58:36 PDT 2016


https://issues.dlang.org/show_bug.cgi?id=16467

          Issue ID: 16467
           Summary: templated function default argument take into account
                    when not needed
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: lodovico at giaretart.net
                CC: lodovico at giaretart.net

T identity(T)(T t = 0)
{
    return t;
}

void main()
{
    int i = identity(); // as expected

    string s = identity("hello");  // error: cannot implictly converto (0)
                                   // of type int to string
}

I would expect the default value to be completely discarded when the user
supplies a value.

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