diff options
Diffstat (limited to 'src/test/ui/array-slice-vec/subslice-patterns-const-eval-match.rs')
-rw-r--r-- | src/test/ui/array-slice-vec/subslice-patterns-const-eval-match.rs | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/src/test/ui/array-slice-vec/subslice-patterns-const-eval-match.rs b/src/test/ui/array-slice-vec/subslice-patterns-const-eval-match.rs deleted file mode 100644 index 5a6283e9f..000000000 --- a/src/test/ui/array-slice-vec/subslice-patterns-const-eval-match.rs +++ /dev/null @@ -1,96 +0,0 @@ -// Test that slice subslice patterns are correctly handled in const evaluation. - -// run-pass - -#[derive(PartialEq, Debug, Clone)] -struct N(u8); - -#[derive(PartialEq, Debug, Clone)] -struct Z; - -macro_rules! n { - ($($e:expr),* $(,)?) => { - [$(N($e)),*] - } -} - -// This macro has an unused variable so that it can be repeated base on the -// number of times a repeated variable (`$e` in `z`) occurs. -macro_rules! zed { - ($e:expr) => { Z } -} - -macro_rules! z { - ($($e:expr),* $(,)?) => { - [$(zed!($e)),*] - } -} - -// Compare constant evaluation and runtime evaluation of a given expression. -macro_rules! compare_evaluation_inner { - ($e:expr, $t:ty $(,)?) => {{ - const CONST_EVAL: $t = $e; - const fn const_eval() -> $t { $e } - static CONST_EVAL2: $t = const_eval(); - let runtime_eval = $e; - assert_eq!(CONST_EVAL, runtime_eval); - assert_eq!(CONST_EVAL2, runtime_eval); - }} -} - -// Compare the result of matching `$e` against `$p` using both `if let` and -// `match`. -macro_rules! compare_evaluation { - ($p:pat, $e:expr, $matches:expr, $t:ty $(,)?) => {{ - compare_evaluation_inner!(if let $p = $e as &[_] { $matches } else { None }, $t); - compare_evaluation_inner!(match $e as &[_] { $p => $matches, _ => None }, $t); - }} -} - -// Repeat `$test`, substituting the given macro variables with the given -// identifiers. -// -// For example: -// -// repeat! { -// ($name); X; Y: -// struct $name; -// } -// -// Expands to: -// -// struct X; struct Y; -// -// This is used to repeat the tests using both the `N` and `Z` -// types. -macro_rules! repeat { - (($($dollar:tt $placeholder:ident)*); $($($values:ident),+);*: $($test:tt)*) => { - macro_rules! single { - ($($dollar $placeholder:ident),*) => { $($test)* } - } - $(single!($($values),+);)* - } -} - -fn main() { - repeat! { - ($arr $Ty); n, N; z, Z: - compare_evaluation!([_, x @ .., _], &$arr!(1, 2, 3, 4), Some(x), Option<&'static [$Ty]>); - compare_evaluation!([x, .., _], &$arr!(1, 2, 3, 4), Some(x), Option<&'static $Ty>); - compare_evaluation!([_, .., x], &$arr!(1, 2, 3, 4), Some(x), Option<&'static $Ty>); - - compare_evaluation!([_, x @ .., _], &$arr!(1, 2), Some(x), Option<&'static [$Ty]>); - compare_evaluation!([x, .., _], &$arr!(1, 2), Some(x), Option<&'static $Ty>); - compare_evaluation!([_, .., x], &$arr!(1, 2), Some(x), Option<&'static $Ty>); - - compare_evaluation!([_, x @ .., _], &$arr!(1), Some(x), Option<&'static [$Ty]>); - compare_evaluation!([x, .., _], &$arr!(1), Some(x), Option<&'static $Ty>); - compare_evaluation!([_, .., x], &$arr!(1), Some(x), Option<&'static $Ty>); - } - - compare_evaluation!([N(x), .., _], &n!(1, 2, 3, 4), Some(x), Option<&'static u8>); - compare_evaluation!([_, .., N(x)], &n!(1, 2, 3, 4), Some(x), Option<&'static u8>); - - compare_evaluation!([N(x), .., _], &n!(1, 2), Some(x), Option<&'static u8>); - compare_evaluation!([_, .., N(x)], &n!(1, 2), Some(x), Option<&'static u8>); -} |