Enum Unsupported 

pub enum Unsupported {
    Inst {
        inst: Inst,
        term: Option<&'static str>,
    },
    Argument {
        index: usize,
        missing: Missing,
    },
    Call {
        inst: Inst,
        refused: Refused,
    },
    Indirect {
        inst: Inst,
    },
}

Why a function could not be lowered.

One reason and then nothing. A function with no rule for something in it is a function this cannot finish, and the second thing it could not lower is not news.

Variants

Inst

An instruction no rule fires on.

Fields

inst: Inst

The instruction that stopped it.

term: Option<&'static str>

What the rule file would call it, or nothing if the rule language has no name for it at all, which is what an instruction at a width nothing is written about looks like.

Argument

A parameter that does not arrive somewhere this can bring it in from.

Not an instruction, which is why it is a separate arm: it is a fact about the signature and there is nothing in the body of the function to point at.

Fields

index: usize

Its position in the signature.

missing: Missing

What is wrong with where it arrives.

Call

A call that passes or gives back a value this cannot put where the convention wants it.

Fields

inst: Inst

The call.

refused: Refused

Which value, and what is wrong with where it travels.

Indirect

A call through an address rather than to a name.

The address is a value in a register and the instruction that calls one is a different instruction, which nothing describes yet.

Fields

inst: Inst

The call.

Trait Implementations

impl Clone for Unsupported

fn clone(&self) -> Unsupported

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Unsupported

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Unsupported

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Unsupported

impl Error for Unsupported

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for Unsupported

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

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Unsupported