Enum UnifyError 

pub enum UnifyError {
    Mismatch {
        expected: MonoType,
        found: MonoType,
    },
    OccursCheck,
    MissingLabel {
        label: String,
        ty: MonoType,
    },
    ArityMismatch {
        expected: usize,
        found: usize,
    },
    OptionalMismatch {
        ty: MonoType,
    },
    CmdLabelMismatch {
        expected: String,
        found: String,
    },
}

Variants

Mismatch

Fields

expected: MonoType

found: MonoType

OccursCheck

MissingLabel

Fields

label: String

ty: MonoType

ArityMismatch

Fields

expected: usize

found: usize

OptionalMismatch

Fields

ty: MonoType

CmdLabelMismatch

SATySFi 0.1’s closed command optional-label map is INVARIANT under unification (upstream subtype_label_map_with_equal_domain, signatureSubtyping.ml:482,511-516): a supplied/declared label set mismatch — either side has a label the other doesn’t — is always rejected, never widened/narrowed. expected/found are each a formatted ?(l1 : τ1, …) rendering of the two sides’ label sets (or ?() for an empty one) for a readable message.

Fields

expected: String

found: String

Trait Implementations

impl Debug for UnifyError

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

Formats the value using the given formatter.

impl Display for UnifyError

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

Formats the value using the given formatter.

impl Error for UnifyError

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.