Enum rustc_const_eval::interpret::UnsupportedOpInfo

pub enum UnsupportedOpInfo {
    Unsupported(String),
    PartialPointerOverwrite(Pointer<AllocId>),
    PartialPointerCopy(Pointer<AllocId>),
    ReadPointerAsBytes,
    ThreadLocalStatic(DefId),
    ReadExternStatic(DefId),
}

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; without knowing absolute addresses, the resulting state cannot be represented by the CTFE interpreter.

PartialPointerCopy(Pointer<AllocId>)

Attempting to copy parts of a pointer to somewhere else; without knowing absolute addresses, the resulting state cannot be represented by the CTFE interpreter.

ReadPointerAsBytes

Encountered a pointer where we needed raw bytes.

ThreadLocalStatic(DefId)

Accessing thread local statics

ReadExternStatic(DefId)

Accessing an unsupported extern static.

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