mirror of https://github.com/rust-lang/rust
111 lines
2.7 KiB
Rust
111 lines
2.7 KiB
Rust
// Test that constructors are considered to be const fns
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//@ run-pass
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// Ctor(..) is transformed to Ctor { 0: ... } in THIR lowering, so directly
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// calling constructors doesn't require them to be const.
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type ExternalType = std::panic::AssertUnwindSafe<(Option<i32>, Result<i32, bool>)>;
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const fn call_external_constructors_in_local_vars() -> ExternalType {
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let f = Some;
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let g = Err;
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let h = std::panic::AssertUnwindSafe;
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let x = f(5);
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let y = g(false);
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let z = h((x, y));
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z
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}
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const CALL_EXTERNAL_CONSTRUCTORS_IN_LOCAL_VARS: ExternalType = {
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let f = Some;
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let g = Err;
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let h = std::panic::AssertUnwindSafe;
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let x = f(5);
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let y = g(false);
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let z = h((x, y));
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z
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};
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const fn call_external_constructors_in_temps() -> ExternalType {
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let x = { Some }(5);
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let y = (*&Err)(false);
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let z = [std::panic::AssertUnwindSafe][0]((x, y));
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z
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}
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const CALL_EXTERNAL_CONSTRUCTORS_IN_TEMPS: ExternalType = {
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let x = { Some }(5);
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let y = (*&Err)(false);
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let z = [std::panic::AssertUnwindSafe][0]((x, y));
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z
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};
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#[derive(Debug, PartialEq)]
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enum LocalOption<T> {
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Some(T),
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_None,
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}
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#[derive(Debug, PartialEq)]
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enum LocalResult<T, E> {
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_Ok(T),
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Err(E),
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}
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#[derive(Debug, PartialEq)]
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struct LocalAssertUnwindSafe<T>(T);
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type LocalType = LocalAssertUnwindSafe<(LocalOption<i32>, LocalResult<i32, bool>)>;
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const fn call_local_constructors_in_local_vars() -> LocalType {
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let f = LocalOption::Some;
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let g = LocalResult::Err;
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let h = LocalAssertUnwindSafe;
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let x = f(5);
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let y = g(false);
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let z = h((x, y));
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z
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}
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const CALL_LOCAL_CONSTRUCTORS_IN_LOCAL_VARS: LocalType = {
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let f = LocalOption::Some;
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let g = LocalResult::Err;
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let h = LocalAssertUnwindSafe;
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let x = f(5);
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let y = g(false);
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let z = h((x, y));
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z
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};
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const fn call_local_constructors_in_temps() -> LocalType {
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let x = { LocalOption::Some }(5);
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let y = (*&LocalResult::Err)(false);
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let z = [LocalAssertUnwindSafe][0]((x, y));
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z
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}
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const CALL_LOCAL_CONSTRUCTORS_IN_TEMPS: LocalType = {
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let x = { LocalOption::Some }(5);
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let y = (*&LocalResult::Err)(false);
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let z = [LocalAssertUnwindSafe][0]((x, y));
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z
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};
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fn main() {
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assert_eq!(
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(
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call_external_constructors_in_local_vars().0,
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call_external_constructors_in_temps().0,
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call_local_constructors_in_local_vars(),
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call_local_constructors_in_temps(),
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),
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(
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CALL_EXTERNAL_CONSTRUCTORS_IN_LOCAL_VARS.0,
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CALL_EXTERNAL_CONSTRUCTORS_IN_TEMPS.0,
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CALL_LOCAL_CONSTRUCTORS_IN_LOCAL_VARS,
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CALL_LOCAL_CONSTRUCTORS_IN_TEMPS,
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)
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);
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}
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