• wjoe (18/18) Mar 01 2022 Hello,
• Paul Backus (5/7) Mar 01 2022 It means you have a struct or class member function that accesses
• wjoe (3/11) Mar 02 2022 That makes sense. Reading the bug report was really helpful.

wjoe <wjoe example.com> writes:

Hello,

what's a dual context as in the deprecation message?

```d
struct MockFile {
   [...]

   void writef(alias fmt, A...)(A args) { // Deprecation: function 
'writef': function requires a dual-context, which is deprecated
     import std.format: format;
     write(format!fmt(args));
   }

   [...]
}

unittest {
   auto f = MockFile();
   immutable fmt = "%d";
   f.writef!fmt(0); // instatiated from here
}
```

Paul Backus <snarwin gmail.com> writes:

On Tuesday, 1 March 2022 at 14:51:47 UTC, wjoe wrote:
 Hello,

 what's a dual context as in the deprecation message?

It means you have a struct or class member function that accesses 
its calling context via a template alias parameter.

See this bug report for more information: 
https://issues.dlang.org/show_bug.cgi?id=5710

wjoe <wjoe example.com> writes:

On Tuesday, 1 March 2022 at 17:58:24 UTC, Paul Backus wrote:
 On Tuesday, 1 March 2022 at 14:51:47 UTC, wjoe wrote:
 Hello,

 what's a dual context as in the deprecation message?

 It means you have a struct or class member function that 
 accesses its calling context via a template alias parameter.

 See this bug report for more information: 
 https://issues.dlang.org/show_bug.cgi?id=5710

That makes sense. Reading the bug report was really helpful.

Thanks.