"alias this" ignored for aliased methods

[dlangBugzillaToGithub]

Vladimir Panteleev (@CyberShadow) reported this on 2014-02-21T21:35:56Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=12222

CC List

• RazvanN

Description

///// test.d /////
struct S
{
    void f() {}
}

struct W
{
    S s;
    alias s this;
    alias f = s.f;
}

void main()
{
    W w;
    w.f();
}
//////////////////

Compiler complains:

test.d(16,2): Error: this for f needs to be type S not type W

However, there is an "alias this" it W to S which should allow the method to be called with S as the "this" type.

[dlangBugzillaToGithub]

razvan.nitu1305 commented on 2018-11-05T11:41:48Z

Why would you even do that? Isn't the alias this enough?

[dlangBugzillaToGithub]

dlang-bugzilla (@CyberShadow) commented on 2018-12-27T20:56:45Z

I don't remember for certain, but I think it is so that f can be passed as an alias parameter to a method of W.