Struct cranelift_codegen::Writable

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pub struct Writable<T: Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> { /* private fields */ }
Expand description

A type wrapper that indicates a register type is writable. The underlying register can be extracted, and the type wrapper can be built using an arbitrary register. Hence, this type-level wrapper is not strictly a guarantee. However, “casting” to a writable register is an explicit operation for which we can audit. Ordinarily, internal APIs in the compiler backend should take a Writable<Reg> whenever the register is written, and the usual, frictionless way to get one of these is to allocate a new temporary.

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impl<T: Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> Writable<T>

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pub fn from_reg(reg: T) -> Writable<T>

Explicitly construct a Writable<T> from a T. As noted in the documentation for Writable, this is not hidden or disallowed from the outside; anyone can perform the “cast”; but it is explicit so that we can audit the use sites.

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pub fn to_reg(self) -> T

Get the underlying register, which can be read.

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pub fn map<U, F>(self, f: F) -> Writable<U>
where U: Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash, F: Fn(T) -> U,

Map the underlying register to another value or type.

Trait Implementations§

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impl<T: Clone + Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> Clone for Writable<T>

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fn clone(&self) -> Writable<T>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<T: Debug + Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> Debug for Writable<T>

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

Formats the value using the given formatter. Read more
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impl From<Writable<Reg>> for RegMem

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fn from(r: Writable<Reg>) -> Self

Converts to this type from the input type.
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impl<T: Hash + Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> Hash for Writable<T>

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<T: Ord + Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> Ord for Writable<T>

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fn cmp(&self, other: &Writable<T>) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl<T: PartialEq + Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> PartialEq for Writable<T>

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fn eq(&self, other: &Writable<T>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T: PartialOrd + Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> PartialOrd for Writable<T>

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fn partial_cmp(&self, other: &Writable<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<T: Copy + Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> Copy for Writable<T>

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impl<T: Eq + Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> Eq for Writable<T>

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impl<T: Clone + Copy + Debug + PartialEq + Eq + PartialOrd + Ord + Hash> StructuralPartialEq for Writable<T>

Auto Trait Implementations§

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impl<T> Freeze for Writable<T>
where T: Freeze,

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impl<T> RefUnwindSafe for Writable<T>
where T: RefUnwindSafe,

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impl<T> Send for Writable<T>
where T: Send,

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impl<T> Sync for Writable<T>
where T: Sync,

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impl<T> Unpin for Writable<T>
where T: Unpin,

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impl<T> UnwindSafe for Writable<T>
where T: UnwindSafe,

Blanket Implementations§

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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<Q, K> Comparable<K> for Q
where Q: Ord + ?Sized, K: Borrow<Q> + ?Sized,

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fn compare(&self, key: &K) -> Ordering

Compare self to key and return their ordering.
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. 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> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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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.