Enum IselError 

#[non_exhaustive]
pub enum IselError {
    Invalid(ValidationError),
    NoBody(FuncId),
    Unsupported {
        func: FuncId,
        what: &'static str,
    },
    Mir(MirError),
}

Why a function could not be selected.

Examples

use backend_lang::isel::IselError;
use backend_lang::Options;
use ir_lang::{Linkage, Module, Signature, Type};

let mut m = Module::new("m");
let f = m.declare_function("f", &Signature::new(&[Type::F64], &[]), Linkage::Export)?;
let mut b = m.build(f)?;
b.ret(&[])?;
let err = backend_lang::isel::select(&m, f, &Options::sysv()).unwrap_err();
assert!(matches!(err, IselError::Unsupported { .. }));

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Invalid(ValidationError)

The module does not validate (ir-lang’s Module::validate).

NoBody(FuncId)

The function handle is not in the module, or it is an import.

Unsupported

A construct this release does not select, and why.

Fields

func: FuncId

The function.

what: &'static str

What, and what it waits on.

Mir(MirError)

Building the MIR failed (a 32-bit table limit, or an internal inconsistency reported rather than panicking).

Trait Implementations

impl Clone for IselError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IselError

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

Formats the value using the given formatter.

impl Display for IselError

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

Formats the value using the given formatter.

impl Eq for IselError

impl Error for IselError

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 From<MirError> for IselError

fn from(e: MirError) -> IselError

Converts to this type from the input type.

impl PartialEq for IselError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IselError