• via Digitalmars-d-bugs (38/38) May 18 2014 https://issues.dlang.org/show_bug.cgi?id=12764

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

https://issues.dlang.org/show_bug.cgi?id=12764

          Issue ID: 12764
           Summary: Disabled struct default construction circumvented when
                    field is written to
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Keywords: accepts-invalid
          Severity: major
          Priority: P1
         Component: DMD
          Assignee: nobody puremagic.com
          Reporter: andrej.mitrovich gmail.com

-----
struct S
{
     disable this();

    this(string) { }
    int f;
}

class C
{
    this(int)
    {
        s.f = 1;  // circumvents default ctor!
    }

    S s;
}

void main() { }
-----

If we comment out writing to 'f' we get:

test.d(11): Error: constructor test.C.this field s must be initialized in
constructor

This should always be emitted unless we explicitly call "s = S(...)" or "s =
S.init".

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