rust/src/test/compile-fail/tps-invariant-enum.rs
2012-04-06 08:31:12 -07:00

18 lines
442 B
Rust

enum box_impl<T> = {
mut f: T
};
fn set_box_impl<T>(b: box_impl<@const T>, v: @const T) {
b.f = v;
}
fn main() {
let b = box_impl::<@int>({mut f: @3});
set_box_impl(b, @mut 5);
//!^ ERROR values differ in mutability
// No error when type of parameter actually IS @const int
let x: @const int = @3; // only way I could find to upcast
let b = box_impl::<@const int>({mut f: x});
set_box_impl(b, @mut 5);
}