[Issue 4407] New: Catch wrong argument<->attribute assignments in methods

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4407

           Summary: Catch wrong argument<->attribute assignments in
                    methods
           Product: D
           Version: D1 & D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: diagnostic
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2010-06-29 18:15:53 PDT ---
This is related to bug 3878 , but it is meant to catch a different kind of bug.
In my code I have seen two times bugs like:


class Foo {
    int x, y;
    this(int x_, int y_) {
        this.x = x;
        y = y;

    }
}
void main() {}


In D.learn Byron Heads has found this bug:
http://www.digitalmars.com/webnews/newsgroups.php?art_group=digitalmars.D.learn&article_id=20354

this(string name, string id) {
    this._name = _name;
    this._id  = id;
}


So I think the D compiler has to catch such bugs, and refuse such assignments
in class/struct member functions.

Automatic code generation can sometimes generate useless assignments, but
catching common human bugs is more important. It's much simpler to fix code
generators than humans.

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