Struct arithmetic_eval::fns::AssertClose

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pub struct AssertClose<T> { /* private fields */ }
Expand description

Assertion that two values are close to each other.

Unlike AssertEq, the arguments must be primitive. The function is parameterized by the tolerance threshold.

§Type

(using arithmetic-typing notation)

(Num, Num) -> ()

§Examples

let program = "
    assert_close(sqrt(9), 3); // this assertion is fine
    assert_close(sqrt(10), 3); // this one should fail
";
let module = Untyped::<F32Grammar>::parse_statements(program)?;
let module = ExecutableModule::new("test_assert", &module)?;

let mut env = Environment::new();
env.insert_native_fn("assert_close", fns::AssertClose::new(1e-4))
    .insert_wrapped_fn("sqrt", f32::sqrt);

let err = module.with_env(&env)?.run().unwrap_err();
assert_eq!(
    err.source().location().in_module().span(program),
    "assert_close(sqrt(10), 3)"
);

Implementations§

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impl<T> AssertClose<T>

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pub const fn new(tolerance: T) -> Self

Creates a function with the specified tolerance threshold. No checks are performed on the threshold (e.g., that it is positive).

Trait Implementations§

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impl<T: Clone> Clone for AssertClose<T>

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fn clone(&self) -> AssertClose<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T: Debug> Debug for AssertClose<T>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<T: Clone + Display> NativeFn<T> for AssertClose<T>

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fn evaluate( &self, args: Vec<SpannedValue<T>>, ctx: &mut CallContext<'_, T>, ) -> EvalResult<T>

Executes the function on the specified arguments.
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impl<T: Copy> Copy for AssertClose<T>

Auto Trait Implementations§

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impl<T> Freeze for AssertClose<T>
where T: Freeze,

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impl<T> RefUnwindSafe for AssertClose<T>
where T: RefUnwindSafe,

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impl<T> Send for AssertClose<T>
where T: Send,

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impl<T> Sync for AssertClose<T>
where T: Sync,

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impl<T> Unpin for AssertClose<T>
where T: Unpin,

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impl<T> UnwindSafe for AssertClose<T>
where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.