On Wednesday, 14 July 2021 at 02:28:07 UTC, someone wrote:
If I add in main():
```d
auto g = MyType!string();
g.doWork();
```
I get:
...: Error: undefined identifier `ResultType`
...: Error: template instance `...MyType!string` error
instantiating
But nothing like:
```d
T.stringof ~ " is not supported"
```
Weirdly, adding a dummy `ResultType` declaration to the `else`
branch makes the assert message show up:
} else {
alias ResultType = void;
static assert(false, T.stringof ~ " is not supported");
}
https://run.dlang.io/is/68sM0Z
Somehow the compiler is processing the declaration of `doWork`
before the `static assert` statement, even though it comes later
in the source code.
According to run.dlang.io this behavior was introduced in DMD
2.066.0, so the example in the book must not have been updated
for quite a while.
