Struct LRc

pub struct LRc<T: ?Sized> {
    pub exp: Rc<T>,
    pub line: u32,
    pub column: u32,
}

Like LBox but encapsulates an Rc. Implements Deref and emulates the Rc::clone function.

Fields

exp: Rc<T>

line: u32

column: u32

Implementations

impl<T> LRc<T>

pub fn new(e: T, ln: usize, col: usize) -> LRc<T>

pub fn transfer<U>(&self, e: U) -> LRc<U>

should be used to create a new LRc-expression that inherits lexical information from existing LRc

pub fn clone(lrc: &LRc<T>) -> LRc<T>

uses Rc::clone to increase reference count of encapsulated Rc, copies line, column and source_id information.

pub fn line(&self) -> usize

pub fn column(&self) -> usize

impl LRc<dyn Any + 'static>

pub fn downcast<U: 'static>(self) -> Option<LRc<U>>

emulates LRc::downcast function. Note that unlike Box::downcast, an Option is returned here instead of a result.

pub fn upcast<T: 'static>(lb: LRc<T>) -> Self

upcasts LRc<T> to LRc<dyn Any>

Trait Implementations

impl<T: Clone> Clone for LRc<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for LRc<T>

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

Formats the value using the given formatter.

impl<T: Default> Default for LRc<T>

fn default() -> Self

Returns the “default value” for a type.

impl Default for LRc<dyn Any + 'static>

this is required if LRc<dyn Any> is used for the abstract syntax type

fn default() -> Self

Returns the “default value” for a type.

impl<T> Deref for LRc<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.