135 lines
4.6 KiB
Rust
135 lines
4.6 KiB
Rust
// ok
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const fn foo1() {}
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const fn foo2(x: i32) -> i32 { x }
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const fn foo3<T>(x: T) -> T { x }
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const fn foo7() {
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(
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foo1(),
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foo2(420),
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foo3(69),
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).0
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}
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const fn foo12<T: Sized>(t: T) -> T { t }
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const fn foo13<T: ?Sized>(t: &T) -> &T { t }
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const fn foo14<'a, T: 'a>(t: &'a T) -> &'a T { t }
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const fn foo15<T>(t: T) -> T where T: Sized { t }
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const fn foo15_2<T>(t: &T) -> &T where T: ?Sized { t }
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const fn foo16(f: f32) -> f32 { f }
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const fn foo17(f: f32) -> u32 { f as u32 }
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const fn foo18(i: i32) -> i32 { i * 3 }
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const fn foo20(b: bool) -> bool { !b }
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const fn foo21<T, U>(t: T, u: U) -> (T, U) { (t, u) }
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const fn foo22(s: &[u8], i: usize) -> u8 { s[i] }
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const FOO: u32 = 42;
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const fn foo23() -> u32 { FOO }
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const fn foo24() -> &'static u32 { &FOO }
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const fn foo27(x: &u32) -> u32 { *x }
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const fn foo28(x: u32) -> u32 { *&x }
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const fn foo29(x: u32) -> i32 { x as i32 }
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const fn foo31(a: bool, b: bool) -> bool { a & b }
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const fn foo32(a: bool, b: bool) -> bool { a | b }
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const fn foo33(a: bool, b: bool) -> bool { a & b }
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const fn foo34(a: bool, b: bool) -> bool { a | b }
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const fn foo35(a: bool, b: bool) -> bool { a ^ b }
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struct Foo<T: ?Sized>(T);
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impl<T> Foo<T> {
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const fn new(t: T) -> Self { Foo(t) }
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const fn into_inner(self) -> T { self.0 } //~ destructor of
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const fn get(&self) -> &T { &self.0 }
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const fn get_mut(&mut self) -> &mut T { &mut self.0 }
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//~^ mutable references
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//~| mutable references
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//~| mutable references
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}
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impl<'a, T> Foo<T> {
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const fn new_lt(t: T) -> Self { Foo(t) }
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const fn into_inner_lt(self) -> T { self.0 } //~ destructor of
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const fn get_lt(&'a self) -> &T { &self.0 }
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const fn get_mut_lt(&'a mut self) -> &mut T { &mut self.0 }
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//~^ mutable references
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//~| mutable references
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//~| mutable references
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}
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impl<T: Sized> Foo<T> {
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const fn new_s(t: T) -> Self { Foo(t) }
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const fn into_inner_s(self) -> T { self.0 } //~ ERROR destructor
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const fn get_s(&self) -> &T { &self.0 }
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const fn get_mut_s(&mut self) -> &mut T { &mut self.0 }
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//~^ mutable references
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//~| mutable references
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//~| mutable references
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}
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impl<T: ?Sized> Foo<T> {
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const fn get_sq(&self) -> &T { &self.0 }
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const fn get_mut_sq(&mut self) -> &mut T { &mut self.0 }
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//~^ mutable references
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//~| mutable references
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//~| mutable references
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}
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const fn char_ops(c: char, d: char) -> bool { c == d }
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const fn char_ops2(c: char, d: char) -> bool { c < d }
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const fn char_ops3(c: char, d: char) -> bool { c != d }
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const fn i32_ops(c: i32, d: i32) -> bool { c == d }
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const fn i32_ops2(c: i32, d: i32) -> bool { c < d }
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const fn i32_ops3(c: i32, d: i32) -> bool { c != d }
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const fn i32_ops4(c: i32, d: i32) -> i32 { c + d }
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const fn char_cast(u: u8) -> char { u as char }
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const unsafe fn ret_i32_no_unsafe() -> i32 { 42 }
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const unsafe fn ret_null_ptr_no_unsafe<T>() -> *const T { core::ptr::null() }
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const unsafe fn ret_null_mut_ptr_no_unsafe<T>() -> *mut T { core::ptr::null_mut() }
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const fn foo11<T: std::fmt::Display>(t: T) -> T { t }
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const fn foo11_2<T: Send>(t: T) -> T { t }
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// not ok
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static BAR: u32 = 42;
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const fn foo25() -> u32 { BAR } //~ ERROR referencing statics in constant functions
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const fn foo26() -> &'static u32 { &BAR } //~ ERROR referencing statics in constant functions
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const fn foo30(x: *const u32) -> usize { x as usize }
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//~^ ERROR pointers cannot be cast to integers
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const fn foo30_with_unsafe(x: *const u32) -> usize { unsafe { x as usize } }
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//~^ ERROR pointers cannot be cast to integers
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const fn foo30_2(x: *mut u32) -> usize { x as usize }
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//~^ ERROR pointers cannot be cast to integers
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const fn foo30_2_with_unsafe(x: *mut u32) -> usize { unsafe { x as usize } }
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//~^ ERROR pointers cannot be cast to integers
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const fn foo30_6() -> bool { let x = true; x }
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const fn inc(x: &mut i32) { *x += 1 }
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//~^ ERROR mutable references
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// ok
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const fn foo36(a: bool, b: bool) -> bool { a && b }
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const fn foo37(a: bool, b: bool) -> bool { a || b }
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fn main() {}
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impl<T: std::fmt::Debug> Foo<T> {
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const fn foo(&self) {}
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}
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impl<T: std::fmt::Debug + Sized> Foo<T> {
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const fn foo2(&self) {}
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}
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impl<T: Sync + Sized> Foo<T> {
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const fn foo3(&self) {}
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}
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struct AlanTuring<T>(T);
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const fn no_apit2(_x: AlanTuring<impl std::fmt::Debug>) {}
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//~^ ERROR destructor
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const fn no_apit(_x: impl std::fmt::Debug) {}
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//~^ ERROR destructor
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const fn no_dyn_trait(_x: &dyn std::fmt::Debug) {}
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const fn no_dyn_trait_ret() -> &'static dyn std::fmt::Debug { &() }
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const fn no_unsafe() { unsafe {} }
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const fn traits_are_ok_i_mean_it() { (&() as &dyn std::fmt::Debug, ()).1 }
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const fn fn_ptrs(_x: fn()) {}
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const fn fn_ptrs2() -> fn() { fn foo() {} foo }
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