On Wednesday, 8 January 2020 at 08:26:51 UTC, user1234 wrote:
class Example
{
@disable this() { pragma(msg, "not allowed..."); }
}
void main()
{
new Example();
}
outputs:
not allowed...
/tmp/temp_7F8C65489550.d(12,5): Error: constructor
`runnable.Example.this` cannot be used because it is annotated
with `@disable`
However, it will print that message even if the constructor is
never called. If you make the constructor a template instead, you
will only get the message when someone attempts to use the
default constructor:
class Example
{
@disable this()() { pragma(msg, "not allowed..."); }
}
void main()
{
new Example();
}
Sadly, this does not work for structs, as they don't really have
a default constructor, as Jonathan pointed out.
--
Simen
