Enum rustc_const_eval::interpret::UnsupportedOpInfo

source · [−]
pub enum UnsupportedOpInfo {
    Unsupported(String),
    PartialPointerOverwrite(Pointer<AllocId>),
    PartialPointerCopy(Pointer<AllocId>),
    ReadPointerAsBytes,
    ThreadLocalStatic(DefId),
    ReadExternStatic(DefId),
}
Expand description

Error information for when the program did something that might (or might not) be correct to do according to the Rust spec, but due to limitations in the interpreter, the operation could not be carried out. These limitations can differ between CTFE and the Miri engine, e.g., CTFE does not support dereferencing pointers at integral addresses.

Variants

Unsupported(String)

Free-form case. Only for errors that are never caught!

PartialPointerOverwrite(Pointer<AllocId>)

Overwriting parts of a pointer; the resulting state cannot be represented in our Allocation data structure. See https://github.com/rust-lang/miri/issues/2181.

PartialPointerCopy(Pointer<AllocId>)

Attempting to copy parts of a pointer to somewhere else; the resulting state cannot be represented in our Allocation data structure. See https://github.com/rust-lang/miri/issues/2181.

ReadPointerAsBytes

Encountered a pointer where we needed raw bytes.

ThreadLocalStatic(DefId)

Accessing thread local statics

ReadExternStatic(DefId)

Accessing an unsupported extern static.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

Converts the given value to a String. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion 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: 32 bytes

Size for each variant:

  • Unsupported: 28 bytes
  • PartialPointerOverwrite: 20 bytes
  • PartialPointerCopy: 20 bytes
  • ReadPointerAsBytes: 0 bytes
  • ThreadLocalStatic: 8 bytes
  • ReadExternStatic: 8 bytes