type Noncopyable = ~fn(); struct Foo { copied: int, moved: ~int, noncopyable: Noncopyable } fn test0(f: Foo, g: Noncopyable, h: Noncopyable) { // just copy implicitly copyable fields from `f`, no moves: let _b = Foo {moved: ~1, noncopyable: g, ..f}; let _c = Foo {moved: ~2, noncopyable: h, ..f}; } fn test1(f: Foo, g: Noncopyable, h: Noncopyable) { // copying move-by-default fields from `f`, so move: let _b = Foo {noncopyable: g, ..f}; let _c = Foo {noncopyable: h, ..f}; //~ ERROR use of moved value: `f` } fn test2(f: Foo, g: Noncopyable) { // move non-copyable field let _b = Foo {copied: 22, moved: ~23, ..f}; let _c = Foo {noncopyable: g, ..f}; //~ ERROR use of moved value: `f` } fn main() {}