Enum rustpython_vm::function::OptionalArg

pub enum OptionalArg<T = PyObjectRef> {
    Present(T),
    Missing,
}

An argument that may or may not be provided by the caller.

This style of argument is not possible in pure Python.

Variants

Present(T)

Missing

Implementations

impl<T> OptionalArg<T>

pub fn from_option(option: Option<T>) -> Self

pub fn into_option(self) -> Option<T>

pub fn as_option(&self) -> Option<&T>

pub fn as_option_mut(&mut self) -> Option<&mut T>

pub fn expect(self, msg: &str) -> T

pub fn unwrap(self) -> T

pub fn unwrap_or(self, default: T) -> T

pub fn unwrap_or_else<_Function: FnOnce() -> T>(self, f: _Function) -> T

pub fn ok_or<_Error>(self, err: _Error) -> Result<T, _Error>

pub fn ok_or_else<_Error, _Function: FnOnce() -> _Error>( self, err: _Function ) -> Result<T, _Error>

pub fn filter<P: FnOnce(&T) -> bool>(self, predicate: P) -> Self

pub fn or(self, optb: Self) -> Self

pub fn or_else<_Function: FnOnce() -> Self>(self, f: _Function) -> Self

pub fn map_or<_Other, _Function: FnOnce(T) -> _Other>( self, default: _Other, f: _Function ) -> _Other

pub fn xor(self, optb: Self) -> Self

pub fn get_or_insert(&mut self, v: T) -> &mut T

pub fn get_or_insert_with<_Function: FnOnce() -> T>( &mut self, f: _Function ) -> &mut T

pub fn replace(&mut self, value: T) -> Self

impl<T> OptionalArg<T>

pub fn as_ref(&self) -> OptionalArg<&T>

pub fn as_mut(&mut self) -> OptionalArg<&mut T>

pub fn map<_Other, _Function: FnOnce(T) -> _Other>( self, f: _Function ) -> OptionalArg<_Other>

pub fn map_or_else<_Other, _Default: FnOnce() -> _Other, _Function: FnOnce(T) -> _Other>( self, default: _Default, f: _Function ) -> _Other

pub fn iter(&self) -> impl Iterator<Item = &T>

pub fn iter_mut(&mut self) -> impl Iterator<Item = &mut T>

pub fn and<_Other>(self, optb: OptionalArg<_Other>) -> OptionalArg<_Other>

pub fn and_then<_Other, _Function: FnOnce(T) -> OptionalArg<_Other>>( self, f: _Function ) -> OptionalArg<_Other>

pub fn zip<_Other>(self, other: OptionalArg<_Other>) -> OptionalArg<(T, _Other)>

pub fn take(&mut self) -> Selfwhere T: Default,

pub fn unwrap_or_default(self) -> Twhere T: Default,

impl<T> OptionalArg<&T>where T: Copy,

pub fn copied(self) -> OptionalArg<T>

impl<T> OptionalArg<&mut T>where T: Copy,

pub fn copied(self) -> OptionalArg<T>

impl<T> OptionalArg<&T>where T: Clone,

pub fn cloned(self) -> OptionalArg<T>

impl<T> OptionalArg<&mut T>where T: Clone,

pub fn cloned(self) -> OptionalArg<T>

impl<T> OptionalArg<T>where T: Deref,

pub fn as_deref(&self) -> OptionalArg<&T::Target>

impl<T: DerefMut> OptionalArg<T>

pub fn as_deref_mut(&mut self) -> OptionalArg<&mut T::Target>

impl<T, _Error> OptionalArg<Result<T, _Error>>

pub fn transpose(self) -> Result<OptionalArg<T>, _Error>

impl<T> OptionalArg<T>

pub const fn is_present(&self) -> bool

Returns true if self is of variant Present.

pub fn as_present(&self) -> Option<&T>

Returns Some if self is a reference of variant Present, and None otherwise.

pub fn as_mut_present(&mut self) -> Option<&mut T>

Returns Some if self is a mutable reference of variant Present, and None otherwise.

pub fn expect_present(self) -> Twhere Self: Debug,

Unwraps the value, yielding the content of Present.

Panics

Panics if the value is not Present, with a panic message including the content of self.

pub fn present(self) -> Option<T>

Returns Some if self is of variant Present, and None otherwise.

pub const fn is_missing(&self) -> bool

Returns true if self is of variant Missing.

impl OptionalArg<PyObjectRef>

pub fn unwrap_or_none(self, vm: &VirtualMachine) -> PyObjectRef

impl<T> OptionalArg<Option<T>>

pub fn flatten(self) -> Option<T>

impl<T> OptionalArg<ArgPrimitiveIndex<T>>

pub fn into_primitive(self) -> OptionalArg<T>

Trait Implementations

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

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for OptionalArg<T>

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

Formats the value using the given formatter.

impl<T> Default for OptionalArg<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T> From<Option<T>> for OptionalArg<T>

fn from(value: Option<T>) -> Self

Converts to this type from the input type.

impl<T> From<OptionalArg<T>> for Option<T>

fn from(value: OptionalArg<T>) -> Self

Converts to this type from the input type.

impl<T> From<T> for OptionalArg<T>

fn from(value: T) -> Self

Converts to this type from the input type.

impl<T: TryFromObject> FromArgOptional for OptionalArg<T>

type Inner = T

fn from_inner(x: T) -> Self

impl<T> FromArgs for OptionalArg<T>where T: TryFromObject,

fn arity() -> RangeInclusive<usize>

The range of positional arguments permitted by the function signature.

fn from_args( vm: &VirtualMachine, args: &mut FuncArgs ) -> Result<Self, ArgumentError>

Extracts this item from the next argument(s).

impl<T> IntoIterator for OptionalArg<T>

type Item = T

The type of the elements being iterated over.

type IntoIter = IntoIter<T>

Which kind of iterator are we turning this into?

fn into_iter(self) -> IntoIter<T>

Creates an iterator from a value.

impl<T> OptionLike for OptionalArg<T>

type SomeType = T

impl<T> Traverse for OptionalArg<T>where T: Traverse,

fn traverse(&self, tracer_fn: &mut TraverseFn<'_>)

impl traverse() with caution! Following those guideline so traverse doesn’t cause memory error!:

impl<T> Copy for OptionalArg<T>where T: Copy,