Hello. How to cast template struct to itself?
struct vec(string S,T=double)
{
T[S.length] data;
auto opCast(string K,E)()
if( S.length == K.length &&
is( T : E ) )
{
vec!(K,E) ret;
foreach( i, ref m; ret.data )
m = data[i];
return ret;
}
}
unittest
{
alias vec!"xyz" dvec3;
alias vec!("rbg",float) fcol3;
auto a = dvec3([1,2,3]);
auto b = fcol3();
b = a; #1
assert( b.data == [1,2,3] );
}
#1 Error: cannot implicitly convert expression (a)
of type vec!("xyz") to vec!("rbg",float)
