• d-bugmail puremagic.com (38/38) Jul 03 2007 http://d.puremagic.com/issues/show_bug.cgi?id=1312
• d-bugmail puremagic.com (12/12) Sep 10 2009 http://d.puremagic.com/issues/show_bug.cgi?id=1312

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=1312

           Summary: invariant storage class within a struct/class
           Product: D
           Version: 2.002
          Platform: PC
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla digitalmars.com
        ReportedBy: Daniel919 web.de


There is an unwanted behaviour when using an invariant storage class within a
struct/class.

------------------------------------------------------------------------
import std.stdio;

struct MyStruct
{
    int x = 1;
    invariant int y = 2;

    //void resety() { y = 3; }; //error: constant y is not an lvalue - as
expected

    /*
        alternatives, that work as expected:
        const int y = 2;
        static invariant int y = 2;

        final int y = 2; //but this takes up storage for each instance
    */
}

void main() {
        MyStruct mystruct;
        mystruct.x = 1; //ok
        //mystruct.y == 1, expected: 2
        //mystruct.y = 2; //no error, but mystruct.x also becomes 2
        writefln("mystruct.sizeof: %s mystruct.x: %s mystruct.y: %s",
mystruct.sizeof, mystruct.x, mystruct.y);
}


-- 

d-bugmail puremagic.com writes:

http://d.puremagic.com/issues/show_bug.cgi?id=1312


Don <clugdbug yahoo.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |clugdbug yahoo.com.au
         Resolution|                            |FIXED


--- Comment #1 from Don <clugdbug yahoo.com.au> 2009-09-10 14:16:16 PDT ---
This was fixed in DMD2.022 or earlier.

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