49 lines
1.8 KiB
Rust
49 lines
1.8 KiB
Rust
|
// Ths test case is exploring the space of how blocs with tail
|
||
|
|
// expressions and statements can be composed, trying to keep each
|
||
|
|
// case on one line so that we can compare them via a vertical scan
|
||
|
|
// with the human eye.
|
||
|
|
|
||
|
|
// Each comment on the right side of the line is summarizing the
|
||
|
|
// expected suggestion from the diagnostic for issue #54556.
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
{ let mut _t1 = D(Box::new("t1")); D(&_t1).end() } ; // suggest `;`
|
||
|
|
|
||
|
|
{ { let mut _t1 = D(Box::new("t1")); D(&_t1).end() } } ; // suggest `;`
|
||
|
|
|
||
|
|
{ { let mut _t1 = D(Box::new("t1")); D(&_t1).end() }; } // suggest `;`
|
||
|
|
|
||
|
|
let _ = { let mut _t1 = D(Box::new("t1")); D(&_t1).end() } ; // suggest `;`
|
||
|
|
|
||
|
|
let _u = { let mut _t1 = D(Box::new("t1")); D(&_t1).unit() } ; // suggest `;`
|
||
|
|
|
||
|
|
let _x = { let mut _t1 = D(Box::new("t1")); D(&_t1).end() } ; // `let x = ...; x`
|
||
|
|
let _x = { let mut _t1 = D(Box::new("t1")); let x = D(&_t1).end(); x } ; // no error
|
||
|
|
|
||
|
|
let mut _y;
|
||
|
|
_y = { let mut _t1 = D(Box::new("t1")); D(&_t1).end() } ; // `let x = ...; x`
|
||
|
|
_y = { let mut _t1 = D(Box::new("t1")); let x = D(&_t1).end(); x } ; // no error
|
||
|
|
}
|
||
|
|
|
||
|
|
fn f_param_ref(_t1: D<Box<&'static str>>) { D(&_t1).unit() } // no error
|
||
|
|
|
||
|
|
fn f_local_ref() { let mut _t1 = D(Box::new("t1")); D(&_t1).unit() } // suggest `;`
|
||
|
|
|
||
|
|
fn f() -> String { let mut _t1 = D(Box::new("t1")); D(&_t1).end() } // `let x = ...; x`
|
||
|
|
|
||
|
|
|
||
|
|
#[derive(Debug)]
|
||
|
|
struct D<T: std::fmt::Debug>(T);
|
||
|
|
|
||
|
|
impl<T: std::fmt::Debug> Drop for D<T> {
|
||
|
|
fn drop(&mut self) {
|
||
|
|
println!("dropping {:?})", self);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
impl<T: std::fmt::Debug> D<T> {
|
||
|
|
fn next<U: std::fmt::Debug>(&self, _other: U) -> D<U> { D(_other) }
|
||
|
|
fn end(&self) -> String { format!("End({:?})", self.0) }
|
||
|
|
fn unit(&self) { }
|
||
|
|
}
|