76 lines
1.5 KiB
Rust
76 lines
1.5 KiB
Rust
//@ run-pass
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#![allow(non_camel_case_types)]
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#![allow(dead_code)]
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//@ compile-flags: --edition 2018
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#![feature(try_blocks)]
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struct catch {}
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pub fn main() {
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let catch_result: Option<_> = try {
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let x = 5;
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x
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};
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assert_eq!(catch_result, Some(5));
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let mut catch = true;
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while catch { catch = false; }
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assert_eq!(catch, false);
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catch = if catch { false } else { true };
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assert_eq!(catch, true);
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match catch {
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_ => {}
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};
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let catch_err: Result<_, i32> = try {
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Err(22)?;
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1
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};
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assert_eq!(catch_err, Err(22));
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let catch_okay: Result<i32, i32> = try {
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if false { Err(25)?; }
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Ok::<(), i32>(())?;
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28
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};
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assert_eq!(catch_okay, Ok(28));
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let catch_from_loop: Result<i32, i32> = try {
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for i in 0..10 {
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if i < 5 { Ok::<i32, i32>(i)?; } else { Err(i)?; }
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}
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22
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};
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assert_eq!(catch_from_loop, Err(5));
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let cfg_init;
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let _res: Result<(), ()> = try {
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cfg_init = 5;
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};
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assert_eq!(cfg_init, 5);
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let cfg_init_2;
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let _res: Result<(), ()> = try {
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cfg_init_2 = 6;
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Err(())?;
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};
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assert_eq!(cfg_init_2, 6);
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let my_string = "test".to_string();
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let res: Result<&str, ()> = try {
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// Unfortunately, deref doesn't fire here (#49356)
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&my_string[..]
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};
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assert_eq!(res, Ok("test"));
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let my_opt: Option<_> = try { () };
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assert_eq!(my_opt, Some(()));
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let my_opt: Option<_> = try { };
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assert_eq!(my_opt, Some(()));
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}
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