Struct arithmetic_eval::fns::Fold
source · pub struct Fold;
Expand description
Reduce (aka fold) function that reduces the provided tuple to a single value.
§Type
(using arithmetic-typing
notation)
(['T], 'Acc, ('Acc, 'T) -> 'Acc) -> 'Acc
§Examples
let program = "
xs = (1, -2, 3, -7);
fold(xs, 1, |acc, x| acc * x) == 42
";
let program = Untyped::<F32Grammar>::parse_statements(program)?;
let module = ExecutableModule::new("test_fold", &program)?;
let mut env = Environment::new();
env.insert_native_fn("fold", fns::Fold);
assert_eq!(module.with_env(&env)?.run()?, Value::Bool(true));
Trait Implementations§
source§impl<T: 'static + Clone> NativeFn<T> for Fold
impl<T: 'static + Clone> NativeFn<T> for Fold
source§fn evaluate(
&self,
args: Vec<SpannedValue<T>>,
ctx: &mut CallContext<'_, T>,
) -> EvalResult<T>
fn evaluate( &self, args: Vec<SpannedValue<T>>, ctx: &mut CallContext<'_, T>, ) -> EvalResult<T>
Executes the function on the specified arguments.
impl Copy for Fold
Auto Trait Implementations§
impl Freeze for Fold
impl RefUnwindSafe for Fold
impl Send for Fold
impl Sync for Fold
impl Unpin for Fold
impl UnwindSafe for Fold
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)