Bug 21176 – deprecation inside template should show the instance loc as errorSupplemental

https://forum.dlang.org/post/[email protected] --- void foo(T)() { alias F = ref int; } void main() { foo!int; } --- outputs: > /tmp/temp_7F8F0E944DF0.d(3,22): Deprecation: storage class `ref` has no effect in type aliases the ER is to have also this one: > /tmp/temp_7F8F0E944DF0.d(8,5): instanciated from here or, when the caller is not a template > /tmp/temp_7F8F0E944DF0.d(8,5): called from here

I cannot reproduce this issue on run.dlang.io. However, I get what you mean: deprecated int a; void foo(T)() { alias F = a; } void main() { foo!int; } If it's an error it does show the stack trace, however I am not convinced that that should also be the case for deprecations.

`deprecated` is sometimes used to refactorize. In this case it's essential to have the instantation sites as additional diagnostic.

The required info is printed if you use "dmd -de" [1], but the more natural way to implement this is to add an option to the "-dw" switch like -dw=context. [1]: onlineapp.d(6): Deprecation: variable onlineapp.a is deprecated onlineapp.d(11): Error: template instance onlineapp.foo!int error instantiating

*** This issue has been marked as a duplicate of issue 20916 ***