Am 13.08.2010 19:01, schrieb simendsjo:
import std.stdio;
struct S
{
void shittyNameThatProbablyGetsRefactored() { };
}
void process(T)(T s)
{
static if( __traits(hasMember, T,
"shittyNameThatProbablyGetsRefactored"))
{
writeln("normal processing");
}
else
{
writeln("Start nuclear war!");
}
}
void main()
{
S s;
process(s);
}
If you rename S's method, process() does something completely different
without a compile time error. By using interfaces this is avoided as the
rename would break the interface.
As I understand this, you want t never start a nuclear war (lol) so do
something like this:
void process(T)(T s) if ( __traits(hasMember, T,
"shittyNameThatProbablyGetsRefactored")) {...}
The if here is a template constraint, which is part of the signature
(which means you can overload with those). If you try to instantiate
your template in a wrong manner, you get a nice ct error at the
instantiation.
Then you can remove the unreachable 'war'-branch.
Mafi
