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// Test which of the builtin types are considered POD.
use std::rc::Rc;
fn assert_copy<T:Copy>() { }
trait Dummy { }
#[derive(Copy, Clone)]
struct MyStruct {
x: isize,
y: isize,
}
struct MyNoncopyStruct {
x: Box<char>,
}
fn test<'a,T,U:Copy>(_: &'a isize) {
// lifetime pointers are ok...
assert_copy::<&'static isize>();
assert_copy::<&'a isize>();
assert_copy::<&'a str>();
assert_copy::<&'a [isize]>();
// ...unless they are mutable
assert_copy::<&'static mut isize>(); //~ ERROR : Copy` is not satisfied
assert_copy::<&'a mut isize>(); //~ ERROR : Copy` is not satisfied
// boxes are not ok
assert_copy::<Box<isize>>(); //~ ERROR : Copy` is not satisfied
assert_copy::<String>(); //~ ERROR : Copy` is not satisfied
assert_copy::<Vec<isize> >(); //~ ERROR : Copy` is not satisfied
assert_copy::<Box<&'a mut isize>>(); //~ ERROR : Copy` is not satisfied
// borrowed object types are generally ok
assert_copy::<&'a dyn Dummy>();
assert_copy::<&'a (dyn Dummy + Send)>();
assert_copy::<&'static (dyn Dummy + Send)>();
// owned object types are not ok
assert_copy::<Box<dyn Dummy>>(); //~ ERROR : Copy` is not satisfied
assert_copy::<Box<dyn Dummy + Send>>(); //~ ERROR : Copy` is not satisfied
// mutable object types are not ok
assert_copy::<&'a mut (dyn Dummy + Send)>(); //~ ERROR : Copy` is not satisfied
// unsafe ptrs are ok
assert_copy::<*const isize>();
assert_copy::<*const &'a mut isize>();
// regular old ints and such are ok
assert_copy::<isize>();
assert_copy::<bool>();
assert_copy::<()>();
// tuples are ok
assert_copy::<(isize,isize)>();
// structs of POD are ok
assert_copy::<MyStruct>();
// structs containing non-POD are not ok
assert_copy::<MyNoncopyStruct>(); //~ ERROR : Copy` is not satisfied
// ref counted types are not ok
assert_copy::<Rc<isize>>(); //~ ERROR : Copy` is not satisfied
}
pub fn main() {
}
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