Struct DataObjectRef

pub struct DataObjectRef(/* private fields */);

Implementations

impl DataObjectRef

pub fn new(data_object: DataObject) -> Self

pub fn text_value(&self) -> Option<Box<str>>

pub fn byte_buffer_value(&self) -> Option<Rc<RefCell<Box<[u8]>>>>

pub fn array_value(&self) -> Option<Rc<RefCell<Box<[DataObjectRef]>>>>

pub fn list_value(&self) -> Option<Rc<RefCell<VecDeque<DataObjectRef>>>>

pub fn var_pointer_value(&self) -> Option<DataObjectRef>

pub fn function_pointer_value(&self) -> Option<FunctionPointerObjectRef>

pub fn struct_value(&self) -> Option<Rc<StructObject>>

pub fn object_value(&self) -> Option<LangObjectRef>

pub fn int_value(&self) -> Option<i32>

pub fn long_value(&self) -> Option<i64>

pub fn float_value(&self) -> Option<f32>

pub fn double_value(&self) -> Option<f64>

pub fn char_value(&self) -> Option<char>

pub fn error_value(&self) -> Option<Rc<ErrorObject>>

pub fn type_value(&self) -> Option<DataType>

pub fn number_value(&self) -> Option<Number>

This method borrows the data object and copies the value from DataObject::number_value

pub fn bool_value(&self) -> Option<bool>

This method borrows the data object and copies the value from DataObject::bool_value

pub fn variable_name(&self) -> Option<Box<str>>

pub fn is_final_data(&self) -> bool

pub fn is_static_data(&self) -> bool

pub fn is_copy_static_and_final_modifiers(&self) -> bool

pub fn is_lang_var(&self) -> bool

pub fn data_type(&self) -> DataType

pub fn type_constraint(&self) -> DataTypeConstraint

This functions clones data

pub fn member_visibility(&self) -> Option<Visibility>

pub fn member_of_class(&self) -> i64

pub fn is_accessible(&self, accessing_class: Option<&LangObjectRef>) -> bool

Methods from Deref<Target = RefCell<DataObject>>

pub fn replace(&self, t: T) -> T

Replaces the wrapped value with a new one, returning the old value, without deinitializing either one.

This function corresponds to std::mem::replace.

Panics

Panics if the value is currently borrowed.

Examples

use std::cell::RefCell;
let cell = RefCell::new(5);
let old_value = cell.replace(6);
assert_eq!(old_value, 5);
assert_eq!(cell, RefCell::new(6));

pub fn replace_with<F>(&self, f: F) -> T

where F: FnOnce(&mut T) -> T,

Replaces the wrapped value with a new one computed from f, returning the old value, without deinitializing either one.

Panics

Panics if the value is currently borrowed.

Examples

use std::cell::RefCell;
let cell = RefCell::new(5);
let old_value = cell.replace_with(|&mut old| old + 1);
assert_eq!(old_value, 5);
assert_eq!(cell, RefCell::new(6));

pub fn swap(&self, other: &RefCell<T>)

Swaps the wrapped value of self with the wrapped value of other, without deinitializing either one.

This function corresponds to std::mem::swap.

Panics

Panics if the value in either RefCell is currently borrowed, or if self and other point to the same RefCell.

Examples

use std::cell::RefCell;
let c = RefCell::new(5);
let d = RefCell::new(6);
c.swap(&d);
assert_eq!(c, RefCell::new(6));
assert_eq!(d, RefCell::new(5));

pub fn borrow(&self) -> Ref<'_, T>

Immutably borrows the wrapped value.

The borrow lasts until the returned Ref exits scope. Multiple immutable borrows can be taken out at the same time.

Panics

Panics if the value is currently mutably borrowed. For a non-panicking variant, use try_borrow.

Examples

use std::cell::RefCell;

let c = RefCell::new(5);

let borrowed_five = c.borrow();
let borrowed_five2 = c.borrow();

An example of panic:

use std::cell::RefCell;

let c = RefCell::new(5);

let m = c.borrow_mut();
let b = c.borrow(); // this causes a panic

pub fn try_borrow(&self) -> Result<Ref<'_, T>, BorrowError>

Immutably borrows the wrapped value, returning an error if the value is currently mutably borrowed.

The borrow lasts until the returned Ref exits scope. Multiple immutable borrows can be taken out at the same time.

This is the non-panicking variant of borrow.

Examples

use std::cell::RefCell;

let c = RefCell::new(5);

{
    let m = c.borrow_mut();
    assert!(c.try_borrow().is_err());
}

{
    let m = c.borrow();
    assert!(c.try_borrow().is_ok());
}

pub fn borrow_mut(&self) -> RefMut<'_, T>

Mutably borrows the wrapped value.

The borrow lasts until the returned RefMut or all RefMuts derived from it exit scope. The value cannot be borrowed while this borrow is active.

Panics

Panics if the value is currently borrowed. For a non-panicking variant, use try_borrow_mut.

Examples

use std::cell::RefCell;

let c = RefCell::new("hello".to_owned());

*c.borrow_mut() = "bonjour".to_owned();

assert_eq!(&*c.borrow(), "bonjour");

An example of panic:

use std::cell::RefCell;

let c = RefCell::new(5);
let m = c.borrow();

let b = c.borrow_mut(); // this causes a panic

pub fn try_borrow_mut(&self) -> Result<RefMut<'_, T>, BorrowMutError>

Mutably borrows the wrapped value, returning an error if the value is currently borrowed.

The borrow lasts until the returned RefMut or all RefMuts derived from it exit scope. The value cannot be borrowed while this borrow is active.

This is the non-panicking variant of borrow_mut.

Examples

use std::cell::RefCell;

let c = RefCell::new(5);

{
    let m = c.borrow();
    assert!(c.try_borrow_mut().is_err());
}

assert!(c.try_borrow_mut().is_ok());

pub fn as_ptr(&self) -> *mut T

Returns a raw pointer to the underlying data in this cell.

Examples

use std::cell::RefCell;

let c = RefCell::new(5);

let ptr = c.as_ptr();

pub unsafe fn try_borrow_unguarded(&self) -> Result<&T, BorrowError>

Immutably borrows the wrapped value, returning an error if the value is currently mutably borrowed.

Safety

Unlike RefCell::borrow, this method is unsafe because it does not return a Ref, thus leaving the borrow flag untouched. Mutably borrowing the RefCell while the reference returned by this method is alive is undefined behavior.

Examples

use std::cell::RefCell;

let c = RefCell::new(5);

{
    let m = c.borrow_mut();
    assert!(unsafe { c.try_borrow_unguarded() }.is_err());
}

{
    let m = c.borrow();
    assert!(unsafe { c.try_borrow_unguarded() }.is_ok());
}

pub fn take(&self) -> T

Takes the wrapped value, leaving Default::default() in its place.

Panics

Panics if the value is currently borrowed.

Examples

use std::cell::RefCell;

let c = RefCell::new(5);
let five = c.take();

assert_eq!(five, 5);
assert_eq!(c.into_inner(), 0);

Trait Implementations

impl AnyWithEq for DataObjectRef

fn as_any(&self) -> &dyn Any

fn is_equals( &self, other: &dyn AnyWithEq, interpreter: &mut Interpreter, pos: CodePosition, ) -> bool

fn is_strict_equals( &self, other: &dyn AnyWithEq, interpreter: &mut Interpreter, pos: CodePosition, ) -> bool

impl Clone for DataObjectRef

fn clone(&self) -> DataObjectRef

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DataObjectRef

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

Formats the value using the given formatter.

impl Default for DataObjectRef

fn default() -> DataObjectRef

Returns the “default value” for a type.

impl Deref for DataObjectRef

type Target = RefCell<DataObject>

The resulting type after dereferencing.

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

Dereferences the value.