add test for implicit stuff in signatures of closures with for<>
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src/test/ui/closures/binder/implicit-stuff.rs
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27
src/test/ui/closures/binder/implicit-stuff.rs
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#![feature(closure_lifetime_binder)]
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fn main() {
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// Implicit types
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let _ = for<> || {}; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
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let _ = for<'a> || -> &'a _ { &() }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
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let _ = for<'a> |x| -> &'a () { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
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let _ = for<'a> |x: &'a _| -> &'a () { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
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let _ = for<'a> |x: &'a Vec::<_>| -> &'a Vec::<()> { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
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let _ = for<'a> |x: &'a Vec<()>| -> &'a Vec<_> { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
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let _ = for<'a> |x: &'a _| -> &'a &'a () { x }; //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
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let _ = for<'a> |x: &'a _, y, z: _| -> &'a _ { //~ ERROR implicit types in closure signatures are forbidden when `for<...>` is present
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let _: &u8 = x;
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let _: u32 = y;
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let _: i32 = z;
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x
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};
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// Lifetime elision
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let _ = for<> |_: &()| -> () {}; //~ ERROR `&` without an explicit lifetime name cannot be used here
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let _ = for<> |x: &()| -> &() { x }; //~ ERROR `&` without an explicit lifetime name cannot be used here
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//~| ERROR `&` without an explicit lifetime name cannot be used here
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let _ = for<> |x: &'_ ()| -> &'_ () { x }; //~ ERROR `'_` cannot be used here
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//~| ERROR `'_` cannot be used here
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let _ = for<'a> |x: &()| -> &'a () { x }; //~ ERROR `&` without an explicit lifetime name cannot be used here
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let _ = for<'a> |x: &'a ()| -> &() { x }; //~ ERROR `&` without an explicit lifetime name cannot be used here
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}
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src/test/ui/closures/binder/implicit-stuff.stderr
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src/test/ui/closures/binder/implicit-stuff.stderr
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error[E0637]: `&` without an explicit lifetime name cannot be used here
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--> $DIR/implicit-stuff.rs:20:23
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LL | let _ = for<> |_: &()| -> () {};
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| ^ explicit lifetime name needed here
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error[E0637]: `&` without an explicit lifetime name cannot be used here
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--> $DIR/implicit-stuff.rs:21:23
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LL | let _ = for<> |x: &()| -> &() { x };
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| ^ explicit lifetime name needed here
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error[E0637]: `&` without an explicit lifetime name cannot be used here
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--> $DIR/implicit-stuff.rs:21:31
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LL | let _ = for<> |x: &()| -> &() { x };
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| ^ explicit lifetime name needed here
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error[E0637]: `'_` cannot be used here
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--> $DIR/implicit-stuff.rs:23:24
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LL | let _ = for<> |x: &'_ ()| -> &'_ () { x };
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| ^^ `'_` is a reserved lifetime name
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error[E0637]: `'_` cannot be used here
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--> $DIR/implicit-stuff.rs:23:35
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LL | let _ = for<> |x: &'_ ()| -> &'_ () { x };
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| ^^ `'_` is a reserved lifetime name
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error[E0637]: `&` without an explicit lifetime name cannot be used here
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--> $DIR/implicit-stuff.rs:25:25
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LL | let _ = for<'a> |x: &()| -> &'a () { x };
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| ^ explicit lifetime name needed here
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error[E0637]: `&` without an explicit lifetime name cannot be used here
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--> $DIR/implicit-stuff.rs:26:36
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LL | let _ = for<'a> |x: &'a ()| -> &() { x };
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| ^ explicit lifetime name needed here
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error: implicit types in closure signatures are forbidden when `for<...>` is present
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--> $DIR/implicit-stuff.rs:5:22
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LL | let _ = for<> || {};
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| ----- ^
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| |
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| `for<...>` is here
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error: implicit types in closure signatures are forbidden when `for<...>` is present
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--> $DIR/implicit-stuff.rs:6:31
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LL | let _ = for<'a> || -> &'a _ { &() };
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| ------- ^
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| |
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| `for<...>` is here
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error: implicit types in closure signatures are forbidden when `for<...>` is present
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--> $DIR/implicit-stuff.rs:7:22
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LL | let _ = for<'a> |x| -> &'a () { x };
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| ------- ^
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| |
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| `for<...>` is here
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error: implicit types in closure signatures are forbidden when `for<...>` is present
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--> $DIR/implicit-stuff.rs:8:29
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LL | let _ = for<'a> |x: &'a _| -> &'a () { x };
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| ------- ^
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| |
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| `for<...>` is here
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error: implicit types in closure signatures are forbidden when `for<...>` is present
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--> $DIR/implicit-stuff.rs:9:35
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LL | let _ = for<'a> |x: &'a Vec::<_>| -> &'a Vec::<()> { x };
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| ------- ^
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| |
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| `for<...>` is here
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error: implicit types in closure signatures are forbidden when `for<...>` is present
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--> $DIR/implicit-stuff.rs:10:49
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LL | let _ = for<'a> |x: &'a Vec<()>| -> &'a Vec<_> { x };
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| ------- `for<...>` is here ^
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error: implicit types in closure signatures are forbidden when `for<...>` is present
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--> $DIR/implicit-stuff.rs:11:29
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LL | let _ = for<'a> |x: &'a _| -> &'a &'a () { x };
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| ------- ^
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| |
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| `for<...>` is here
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error: implicit types in closure signatures are forbidden when `for<...>` is present
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--> $DIR/implicit-stuff.rs:12:29
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LL | let _ = for<'a> |x: &'a _, y, z: _| -> &'a _ {
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| ------- ^ ^ ^ ^
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| |
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| `for<...>` is here
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error: aborting due to 15 previous errors
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For more information about this error, try `rustc --explain E0637`.
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