Enum rustc_middle::mir::visit::MutatingUseContext [−][src]
pub enum MutatingUseContext {
Store,
AsmOutput,
Call,
Yield,
Drop,
Borrow,
AddressOf,
Projection,
Retag,
}
Variants
Appears as LHS of an assignment.
Can often be treated as a Store
, but needs to be separate because
ASM is allowed to read outputs as well, so a Store
-AsmOutput
sequence
cannot be simplified the way a Store
-Store
can be.
Destination of a call.
Destination of a yield.
Being dropped.
Mutable borrow.
AddressOf for *mut pointer.
Used as base for another place, e.g., x
in x.y
. Could potentially mutate the place.
For example, the projection x.y
is marked as a mutation in these cases:
x.y = ...;
f(&mut x.y);
Retagging, a “Stacked Borrows” shadow state operation
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for MutatingUseContext
impl Send for MutatingUseContext
impl Sync for MutatingUseContext
impl Unpin for MutatingUseContext
impl UnwindSafe for MutatingUseContext
Blanket Implementations
Mutably borrows from an owned value. Read more
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: 1 byte
Size for each variant:
Store
: 0 bytesAsmOutput
: 0 bytesCall
: 0 bytesYield
: 0 bytesDrop
: 0 bytesBorrow
: 0 bytesAddressOf
: 0 bytesProjection
: 0 bytesRetag
: 0 bytes