Struct arithmetic_eval::fns::AssertEq
source · pub struct AssertEq;
Expand description
Equality assertion function.
§Type
(using arithmetic-typing
notation)
('T, 'T) -> ()
§Examples
let program = "
assert_eq(1 + 2, 3); // this assertion is fine
assert_eq(3^2, 10); // this one will 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_eq", fns::AssertEq);
let err = module.with_env(&env)?.run().unwrap_err();
assert_eq!(
err.source().location().in_module().span(program),
"assert_eq(3^2, 10)"
);
assert_matches!(
err.source().kind(),
ErrorKind::NativeCall(msg) if msg == "Equality assertion failed"
);
Trait Implementations§
source§impl<T: Display> NativeFn<T> for AssertEq
impl<T: Display> NativeFn<T> for AssertEq
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 AssertEq
Auto Trait Implementations§
impl Freeze for AssertEq
impl RefUnwindSafe for AssertEq
impl Send for AssertEq
impl Sync for AssertEq
impl Unpin for AssertEq
impl UnwindSafe for AssertEq
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
)