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Do a format for function.rs #57330

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56 changes: 35 additions & 21 deletions src/libcore/ops/function.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -57,13 +57,16 @@
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_paren_sugar]
#[rustc_on_unimplemented(
on(Args="()", note="wrap the `{Self}` in a closure with no arguments: `|| {{ /* code */ }}"),
message="expected a `{Fn}<{Args}>` closure, found `{Self}`",
label="expected an `Fn<{Args}>` closure, found `{Self}`",
on(
Args = "()",
note = "wrap the `{Self}` in a closure with no arguments: `|| {{ /* code */ }}"
),
message = "expected a `{Fn}<{Args}>` closure, found `{Self}`",
label = "expected an `Fn<{Args}>` closure, found `{Self}`"
)]
#[fundamental] // so that regex can rely that `&str: !FnMut`
#[must_use]
pub trait Fn<Args> : FnMut<Args> {
pub trait Fn<Args>: FnMut<Args> {
/// Performs the call operation.
#[unstable(feature = "fn_traits", issue = "29625")]
extern "rust-call" fn call(&self, args: Args) -> Self::Output;
Expand Down Expand Up @@ -136,13 +139,16 @@ pub trait Fn<Args> : FnMut<Args> {
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_paren_sugar]
#[rustc_on_unimplemented(
on(Args="()", note="wrap the `{Self}` in a closure with no arguments: `|| {{ /* code */ }}"),
message="expected a `{FnMut}<{Args}>` closure, found `{Self}`",
label="expected an `FnMut<{Args}>` closure, found `{Self}`",
on(
Args = "()",
note = "wrap the `{Self}` in a closure with no arguments: `|| {{ /* code */ }}"
),
message = "expected a `{FnMut}<{Args}>` closure, found `{Self}`",
label = "expected an `FnMut<{Args}>` closure, found `{Self}`"
)]
#[fundamental] // so that regex can rely that `&str: !FnMut`
#[must_use]
pub trait FnMut<Args> : FnOnce<Args> {
pub trait FnMut<Args>: FnOnce<Args> {
/// Performs the call operation.
#[unstable(feature = "fn_traits", issue = "29625")]
extern "rust-call" fn call_mut(&mut self, args: Args) -> Self::Output;
Expand Down Expand Up @@ -215,9 +221,12 @@ pub trait FnMut<Args> : FnOnce<Args> {
#[stable(feature = "rust1", since = "1.0.0")]
#[rustc_paren_sugar]
#[rustc_on_unimplemented(
on(Args="()", note="wrap the `{Self}` in a closure with no arguments: `|| {{ /* code */ }}"),
message="expected a `{FnOnce}<{Args}>` closure, found `{Self}`",
label="expected an `FnOnce<{Args}>` closure, found `{Self}`",
on(
Args = "()",
note = "wrap the `{Self}` in a closure with no arguments: `|| {{ /* code */ }}"
),
message = "expected a `{FnOnce}<{Args}>` closure, found `{Self}`",
label = "expected an `FnOnce<{Args}>` closure, found `{Self}`"
)]
#[fundamental] // so that regex can rely that `&str: !FnMut`
#[must_use]
Expand All @@ -233,26 +242,29 @@ pub trait FnOnce<Args> {

mod impls {
#[stable(feature = "rust1", since = "1.0.0")]
impl<A,F:?Sized> Fn<A> for &F
where F : Fn<A>
impl<A, F: ?Sized> Fn<A> for &F
where
F: Fn<A>,
{
extern "rust-call" fn call(&self, args: A) -> F::Output {
(**self).call(args)
}
}

#[stable(feature = "rust1", since = "1.0.0")]
impl<A,F:?Sized> FnMut<A> for &F
where F : Fn<A>
impl<A, F: ?Sized> FnMut<A> for &F
where
F: Fn<A>,
{
extern "rust-call" fn call_mut(&mut self, args: A) -> F::Output {
(**self).call(args)
}
}

#[stable(feature = "rust1", since = "1.0.0")]
impl<A,F:?Sized> FnOnce<A> for &F
where F : Fn<A>
impl<A, F: ?Sized> FnOnce<A> for &F
where
F: Fn<A>,
{
type Output = F::Output;

Expand All @@ -262,17 +274,19 @@ mod impls {
}

#[stable(feature = "rust1", since = "1.0.0")]
impl<A,F:?Sized> FnMut<A> for &mut F
where F : FnMut<A>
impl<A, F: ?Sized> FnMut<A> for &mut F
where
F: FnMut<A>,
{
extern "rust-call" fn call_mut(&mut self, args: A) -> F::Output {
(*self).call_mut(args)
}
}

#[stable(feature = "rust1", since = "1.0.0")]
impl<A,F:?Sized> FnOnce<A> for &mut F
where F : FnMut<A>
impl<A, F: ?Sized> FnOnce<A> for &mut F
where
F: FnMut<A>,
{
type Output = F::Output;
extern "rust-call" fn call_once(self, args: A) -> F::Output {
Expand Down