Enum rustc_infer::infer::type_variable::TypeVariableOriginKind

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pub enum TypeVariableOriginKind {
    MiscVariable,
    NormalizeProjectionType,
    TypeInference,
    OpaqueTypeInference(DefId),
    TypeParameterDefinition(Symbol, DefId),
    ClosureSynthetic,
    AutoDeref,
    AdjustmentType,
    DynReturnFn,
    LatticeVariable,
}
Expand description

Reasons to create a type inference variable

Variants§

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MiscVariable

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NormalizeProjectionType

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TypeInference

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OpaqueTypeInference(DefId)

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TypeParameterDefinition(Symbol, DefId)

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ClosureSynthetic

One of the upvars or closure kind parameters in a ClosureArgs (before it has been determined).

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AutoDeref

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AdjustmentType

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DynReturnFn

In type check, when we are type checking a function that returns -> dyn Foo, we substitute a type variable for the return type for diagnostic purposes.

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LatticeVariable

Trait Implementations§

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impl Clone for TypeVariableOriginKind

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fn clone(&self) -> TypeVariableOriginKind

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 Debug for TypeVariableOriginKind

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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 Copy for TypeVariableOriginKind

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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 Twhere 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.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 16 bytes

Size for each variant:

  • MiscVariable: 0 bytes
  • NormalizeProjectionType: 0 bytes
  • TypeInference: 0 bytes
  • OpaqueTypeInference: 8 bytes
  • TypeParameterDefinition: 12 bytes
  • ClosureSynthetic: 0 bytes
  • AutoDeref: 0 bytes
  • AdjustmentType: 0 bytes
  • DynReturnFn: 0 bytes
  • LatticeVariable: 0 bytes