[Issue 8006] Implement proper in-place-modification for properties

Jun 20, 2016

greensunny12@gmail.com

Jun 20, 2016

greensunny12@gmail.com

Oct 09, 2016

Aug 07, 2017

Aug 11, 2017

Aug 14, 2017

Aug 14, 2017

Dec 17, 2022

https://issues.dlang.org/show_bug.cgi?id=8006 greensunny12@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- Blocks| |16187 --

https://issues.dlang.org/show_bug.cgi?id=8006 greensunny12@gmail.com changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |greensunny12@gmail.com --- Comment #4 from greensunny12@gmail.com --- Issue 16187 (bitmanip fields should be lvalues) depends on this. Has anyone worked on implementing this lowering on the DMD frontend? --

October 09, 2016

[Issue 8006] Implement proper in-place-modification for properties

Posted by mikey

Permalink

mikey

Permalink

https://issues.dlang.org/show_bug.cgi?id=8006

mikey <abc.mikey@googlemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |abc.mikey@googlemail.com

--- Comment #5 from mikey <abc.mikey@googlemail.com> ---
As a beginner this is a source of some confusion for me. Ideally the implementation details of a property vs a member variable should be transparent to me as a user of a given object.




class Test {
private:
    int _val, _val2;

public:

    @property int val() { return _val; }
    @property void val(int val) { _val = val; }

    @property auto ref val2() { return _val2; }
}

void main() {

    auto t = new Test;
    //t.val += 100; // BAD - not an lvalue

    t.val(t.val + 100); // probably preferable to misleading syntax

    t.val2 += 200; // OK - but inconsistent

    import std.stdio : writefln;
    writefln("val: %d, val2: %d", t.val, t.val2);
}

~

--

https://issues.dlang.org/show_bug.cgi?id=8006 Mike <slavo5150@yahoo.com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |slavo5150@yahoo.com --

https://issues.dlang.org/show_bug.cgi?id=8006 Walter Bright <bugzilla@digitalmars.com> changed: What |Removed |Added ---------------------------------------------------------------------------- See Also| |https://issues.dlang.org/sh | |ow_bug.cgi?id=16187 --

https://issues.dlang.org/show_bug.cgi?id=8006 Iain Buclaw <ibuclaw@gdcproject.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P2 |P4 --

Forums