Enum rustc_mir_build::build::BlockFrame

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enum BlockFrame {
    Statement {
        ignores_expr_result: bool,
    },
    TailExpr {
        tail_result_is_ignored: bool,
        span: Span,
    },
    SubExpr,
}

Variants§

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Statement

Evaluation is currently within a statement.

Examples include:

  1. EXPR;
  2. let _ = EXPR;
  3. let x = EXPR;

Fields

§ignores_expr_result: bool

If true, then statement discards result from evaluating the expression (such as examples 1 and 2 above).

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TailExpr

Evaluation is currently within the tail expression of a block.

Example: { STMT_1; STMT_2; EXPR }

Fields

§tail_result_is_ignored: bool

If true, then the surrounding context of the block ignores the result of evaluating the block’s tail expression.

Example: let _ = { STMT_1; EXPR };

§span: Span

Span of the tail expression.

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SubExpr

Generic mark meaning that the block occurred as a subexpression where the result might be used.

Examples: foo(EXPR), match EXPR { ... }

Implementations§

Trait Implementations§

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impl Debug for BlockFrame

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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 PartialEq for BlockFrame

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fn eq(&self, other: &BlockFrame) -> bool

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for BlockFrame

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impl StructuralPartialEq for BlockFrame

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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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> AnyEq for T
where T: Any + PartialEq,

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fn equals(&self, other: &(dyn Any + 'static)) -> bool

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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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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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

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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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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

Creates a filterable data provider with the given name for debugging. Read more
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fn from(t: T) -> T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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Calls U::from(self).

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

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type Error = !

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type Output = T

Should always be Self
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Performs the conversion.
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fn vzip(self) -> V

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impl<Tcx, T> Value<Tcx> for T
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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed, ) -> T

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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: 12 bytes

Size for each variant:

  • Statement: 1 byte
  • TailExpr: 11 bytes
  • SubExpr: 0 bytes