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use crate::marker::Destruct; | ||
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/// Struct representing a closure with owned data. | ||
/// | ||
/// Example: | ||
/// ```rust | ||
/// use const_closure::ConstFnOnceClosure; | ||
/// const fn imp(state: i32, (arg,): (i32,)) -> i32 { | ||
/// state + arg | ||
/// } | ||
/// let i = 5; | ||
/// let cl = ConstFnOnceClosure::new(i, imp); | ||
/// | ||
/// assert!(7 == cl(2)); | ||
/// ``` | ||
pub(crate) struct ConstFnOnceClosure<CapturedData, Function> { | ||
data: CapturedData, | ||
func: Function, | ||
} | ||
impl<CapturedData, Function> ConstFnOnceClosure<CapturedData, Function> { | ||
/// Function for creating a new closure. | ||
/// | ||
/// `data` is the owned data that is captured from the environment (this data must be `~const Destruct`). | ||
/// | ||
/// `func` is the function of the closure, it gets the data and a tuple of the arguments closure | ||
/// and return the return value of the closure. | ||
#[allow(dead_code)] | ||
pub(crate) const fn new<ClosureArguments, ClosureReturnValue>( | ||
data: CapturedData, | ||
func: Function, | ||
) -> Self | ||
where | ||
CapturedData: ~const Destruct, | ||
Function: ~const Fn(CapturedData, ClosureArguments) -> ClosureReturnValue + ~const Destruct, | ||
{ | ||
Self { data, func } | ||
} | ||
} | ||
impl<CapturedData, ClosureArguments, Function> const FnOnce<ClosureArguments> | ||
for ConstFnOnceClosure<CapturedData, Function> | ||
where | ||
CapturedData: ~const Destruct, | ||
Function: ~const Fn<(CapturedData, ClosureArguments)> + ~const Destruct, | ||
{ | ||
type Output = Function::Output; | ||
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extern "rust-call" fn call_once(self, args: ClosureArguments) -> Self::Output { | ||
(self.func)(self.data, args) | ||
} | ||
} | ||
/// Struct representing a closure with mutably borrowed data. | ||
/// | ||
/// Example: | ||
/// ```rust | ||
/// #![feature(const_mut_refs)] | ||
/// use const_closure::ConstFnMutClosure; | ||
/// const fn imp(state: &mut i32, (arg,): (i32,)) -> i32 { | ||
/// *state += arg; | ||
/// *state | ||
/// } | ||
/// let mut i = 5; | ||
/// let mut cl = ConstFnMutClosure::new(&mut i, imp); | ||
/// | ||
/// assert!(7 == cl(2)); | ||
/// assert!(8 == cl(1)); | ||
/// ``` | ||
pub(crate) struct ConstFnMutClosure<'a, CapturedData: ?Sized, Function> { | ||
data: &'a mut CapturedData, | ||
func: Function, | ||
} | ||
impl<'a, CapturedData: ?Sized, Function> ConstFnMutClosure<'a, CapturedData, Function> { | ||
/// Function for creating a new closure. | ||
/// | ||
/// `data` is the a mutable borrow of data that is captured from the environment. | ||
/// | ||
/// `func` is the function of the closure, it gets the data and a tuple of the arguments closure | ||
/// and return the return value of the closure. | ||
pub(crate) const fn new<ClosureArguments, ClosureReturnValue>( | ||
data: &'a mut CapturedData, | ||
func: Function, | ||
) -> Self | ||
where | ||
Function: ~const Fn(&mut CapturedData, ClosureArguments) -> ClosureReturnValue, | ||
{ | ||
Self { data, func } | ||
} | ||
} | ||
impl<'a, CapturedData: ?Sized, ClosureArguments, Function, ClosureReturnValue> const | ||
FnOnce<ClosureArguments> for ConstFnMutClosure<'a, CapturedData, Function> | ||
where | ||
Function: | ||
~const Fn(&mut CapturedData, ClosureArguments) -> ClosureReturnValue + ~const Destruct, | ||
{ | ||
type Output = ClosureReturnValue; | ||
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extern "rust-call" fn call_once(mut self, args: ClosureArguments) -> Self::Output { | ||
self.call_mut(args) | ||
} | ||
} | ||
impl<'a, CapturedData: ?Sized, ClosureArguments, Function, ClosureReturnValue> const | ||
FnMut<ClosureArguments> for ConstFnMutClosure<'a, CapturedData, Function> | ||
where | ||
Function: ~const Fn(&mut CapturedData, ClosureArguments) -> ClosureReturnValue, | ||
{ | ||
extern "rust-call" fn call_mut(&mut self, args: ClosureArguments) -> Self::Output { | ||
(self.func)(self.data, args) | ||
} | ||
} | ||
|
||
/// Struct representing a closure with borrowed data. | ||
/// | ||
/// Example: | ||
/// ```rust | ||
/// use const_closure::ConstFnClosure; | ||
/// | ||
/// const fn imp(state: &i32, (arg,): (i32,)) -> i32 { | ||
/// *state + arg | ||
/// } | ||
/// let i = 5; | ||
/// let cl = ConstFnClosure::new(&i, imp); | ||
/// | ||
/// assert!(7 == cl(2)); | ||
/// assert!(6 == cl(1)); | ||
/// ``` | ||
pub(crate) struct ConstFnClosure<'a, CapturedData: ?Sized, Function> { | ||
data: &'a CapturedData, | ||
func: Function, | ||
} | ||
impl<'a, CapturedData: ?Sized, Function> ConstFnClosure<'a, CapturedData, Function> { | ||
/// Function for creating a new closure. | ||
/// | ||
/// `data` is the a mutable borrow of data that is captured from the environment. | ||
/// | ||
/// `func` is the function of the closure, it gets the data and a tuple of the arguments closure | ||
/// and return the return value of the closure. | ||
#[allow(dead_code)] | ||
pub(crate) const fn new<ClosureArguments, ClosureReturnValue>( | ||
data: &'a CapturedData, | ||
func: Function, | ||
) -> Self | ||
where | ||
Function: ~const Fn(&CapturedData, ClosureArguments) -> ClosureReturnValue, | ||
{ | ||
Self { data, func } | ||
} | ||
} | ||
impl<'a, CapturedData: ?Sized, Function, ClosureArguments, ClosureReturnValue> const | ||
FnOnce<ClosureArguments> for ConstFnClosure<'a, CapturedData, Function> | ||
where | ||
Function: ~const Fn(&CapturedData, ClosureArguments) -> ClosureReturnValue + ~const Destruct, | ||
{ | ||
type Output = ClosureReturnValue; | ||
|
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extern "rust-call" fn call_once(mut self, args: ClosureArguments) -> Self::Output { | ||
self.call_mut(args) | ||
} | ||
} | ||
impl<'a, CapturedData: ?Sized, Function, ClosureArguments, ClosureReturnValue> const | ||
FnMut<ClosureArguments> for ConstFnClosure<'a, CapturedData, Function> | ||
where | ||
Function: ~const Fn(&CapturedData, ClosureArguments) -> ClosureReturnValue, | ||
{ | ||
extern "rust-call" fn call_mut(&mut self, args: ClosureArguments) -> Self::Output { | ||
self.call(args) | ||
} | ||
} | ||
impl< | ||
'a, | ||
CapturedData: ?Sized, | ||
Function: ~const Fn(&CapturedData, ClosureArguments) -> ClosureReturnValue, | ||
ClosureArguments, | ||
ClosureReturnValue, | ||
> const Fn<ClosureArguments> for ConstFnClosure<'a, CapturedData, Function> | ||
{ | ||
extern "rust-call" fn call(&self, args: ClosureArguments) -> Self::Output { | ||
(self.func)(self.data, args) | ||
} | ||
} |
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