Struct ketos::value::ForeignFn

pub struct ForeignFn<F> { /* fields omitted */ }

Represents a foreign value that contains a callable function or closure

Trait Implementations

impl<F> Debug for ForeignFn<F>

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

Formats the value using the given formatter.

impl<F> ForeignValue for ForeignFn<F> where F: Any + Fn(&Context, &mut [Value]) -> Result<Value, Error>

fn compare_to(&self, _rhs: &ForeignValue) -> Result<Ordering, ExecError>

Performs ordered comparison between two values of a foreign type.

fn fmt_debug(&self, names: &NameStore, f: &mut Formatter) -> Result

Format the value in debugging mode.

fn type_name(&self) -> &'static str

Return the value's type name.

fn call_value(&self, ctx: &Context, args: &mut [Value]) -> Result<Value, Error>

Calls the value as a function.

fn compare_to_value(&self, rhs: &Value) -> Result<Ordering, ExecError>

Performs ordered comparison between two values.

fn is_identical_to(&self, rhs: &ForeignValue) -> bool

Returns whether the two values are identical. This concept is the same as equality, except in the case of floating point values, where two NaN values are considered identical.

fn is_equal_to(&self, rhs: &ForeignValue) -> Result<bool, ExecError>

Tests for equality between two values of a foreign type.

fn is_equal_to_value(&self, rhs: &Value) -> Result<bool, ExecError>

Tests for equality between two values.

fn fmt_display(&self, names: &NameStore, f: &mut Formatter) -> Result

Format the value in display mode.

fn is_type(&self, name: &str) -> bool

Returns whether this value is of the named type.

fn size(&self) -> usize

Returns an estimate of the memory held by this value.