mirror of https://github.com/rust-lang/rust
58 lines
1.1 KiB
Rust
58 lines
1.1 KiB
Rust
//@ run-pass
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fn match_on_local() {
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let mut foo: Option<Box<_>> = Some(Box::new(5));
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match foo {
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None => {},
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Some(x) => {
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foo = Some(x);
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}
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}
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println!("'{}'", foo.unwrap());
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}
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fn match_on_arg(mut foo: Option<Box<i32>>) {
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match foo {
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None => {}
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Some(x) => {
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foo = Some(x);
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}
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}
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println!("'{}'", foo.unwrap());
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}
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fn match_on_binding() {
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match Some(Box::new(7)) {
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mut foo => {
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match foo {
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None => {},
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Some(x) => {
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foo = Some(x);
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}
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}
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println!("'{}'", foo.unwrap());
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}
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}
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}
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fn match_on_upvar() {
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let mut foo: Option<Box<_>> = Some(Box::new(8));
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let f = move|| {
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match foo {
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None => {},
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Some(x) => {
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foo = Some(x);
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}
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}
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println!("'{}'", foo.unwrap());
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};
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f();
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}
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fn main() {
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match_on_local();
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match_on_arg(Some(Box::new(6)));
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match_on_binding();
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match_on_upvar();
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}
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