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Scope

Struct Scope 

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pub struct Scope {
    pub vars: BTreeMap<String, Value>,
    pub parent: Option<Rc<RefCell<Scope>>>,
    pub is_block: bool,
    pub gc_slot: u32,
}
Expand description

変数スコープ。

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§vars: BTreeMap<String, Value>§parent: Option<Rc<RefCell<Scope>>>§is_block: bool

ブロック({ let/const ... }・catch)のスコープか。var はここを素通りして 最も近い関数(またはプログラム)のスコープへ宣言する。

§gc_slot: u32

循環ゴミ回収(cycle_gc)の台帳の番号。

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impl Scope

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pub fn new_root() -> Rc<RefCell<Scope>>

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pub fn child(parent: Rc<RefCell<Scope>>) -> Rc<RefCell<Scope>>

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pub fn block(parent: Rc<RefCell<Scope>>) -> Rc<RefCell<Scope>>

ブロックスコープ(2026-10-03)。

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impl Drop for Scope

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fn drop(&mut self)

Executes the destructor for this type. Read more
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fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)
Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned. Read more

Auto Trait Implementations§

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impl !RefUnwindSafe for Scope

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impl !Send for Scope

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impl !Sync for Scope

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impl !UnwindSafe for Scope

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impl Freeze for Scope

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impl Unpin for Scope

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impl UnsafeUnpin for Scope

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.