1 // Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution.
4 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
5 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
7 // option. This file may not be copied, modified, or distributed
8 // except according to those terms.
10 fn some_func(a: Option<u32>) -> Option<u32> {
18 pub enum SeemsOption<T> {
23 impl<T> SeemsOption<T> {
24 pub fn is_none(&self) -> bool {
26 SeemsOption::None => true,
27 SeemsOption::Some(_) => false,
32 fn returns_something_similar_to_option(a: SeemsOption<u32>) -> SeemsOption<u32> {
34 return SeemsOption::None;
40 pub struct CopyStruct {
46 pub fn func(&self) -> Option<u32> {
47 if (self.opt).is_none() {
51 if self.opt.is_none() {
55 let _ = if self.opt.is_none() {
66 pub struct MoveStruct {
67 pub opt: Option<Vec<u32>>,
71 pub fn ref_func(&self) -> Option<Vec<u32>> {
72 if self.opt.is_none() {
79 pub fn mov_func_reuse(self) -> Option<Vec<u32>> {
80 if self.opt.is_none() {
87 pub fn mov_func_no_use(self) -> Option<Vec<u32>> {
88 if self.opt.is_none() {
99 let copy_struct = CopyStruct { opt: Some(54) };
102 let move_struct = MoveStruct {
103 opt: Some(vec![42, 1337]),
105 move_struct.ref_func();
106 move_struct.clone().mov_func_reuse();
107 move_struct.clone().mov_func_no_use();
109 let so = SeemsOption::Some(45);
110 returns_something_similar_to_option(so);