On Wednesday, 4 December 2019 at 23:53:53 UTC, NeeO wrote:
Would someone be able to explain this ? I can only seem to call
a template constructor in one way, but I can't seem to pass
what looks like an accepted type to the template constructor
via a function call.
/+ main.d +/
import std.stdio ;
struct obj_ (T) {
int demo ;
this (int R,int C)(T[R][C] val) {
writeln ("init for type is ",val.init) ;
writeln ("num rows ",R ) ;
writeln ("num cols ",C ) ;
}
}
void check (obj_!float val) {
writeln ("success") ;
}
int main () {
float[3][4] testval ;
obj_!float p = testval ; /+ works +/
check (testval) ; /+ not callable using argument types
compiler error +/
return 0 ;
}
Hello, the problem you encounter here is that D, per spec, does
not perform implicit construction from parameters. You have to
constructs explicitly. Nothing more to explain.
