Enum CompileError 

pub enum CompileError {
    Parse(Diagnostics),
    PremiseRedefinition {
        name: String,
    },
    MissingDomain {
        file: String,
    },
    DuplicateDomain {
        file: String,
    },
    UnknownDomain {
        domain: String,
    },
    DomainAliasClash {
        alias: String,
    },
    ImportNotFound(String),
    CircularImport(String),
    RuleDisjunctiveConsequent {
        name: String,
    },
    UnknownValue(Box<UnknownValue>),
}

Anything that can go wrong while compiling (and resolving imports).

Variants

Parse(Diagnostics)

A source failed to parse; carries the full syntax diagnostics (every error, each as a caret block with the keyword’s correct syntax). The source label is already inside the Diagnostics header.

PremiseRedefinition

A name was reused with a different body within the same source.

Fields

name: String

The clashing premise/rule name.

MissingDomain

A source did not declare its DOMAIN (required, once, as the first statement).

Fields

file: String

The source label that lacked a DOMAIN.

DuplicateDomain

A source declared DOMAIN more than once (a file has exactly one domain).

Fields

file: String

The source label with the duplicate DOMAIN.

UnknownDomain

An atom referenced a domain. prefix that is not the file’s own domain and was not imported in this file.

Fields

domain: String

The unresolved domain prefix.

DomainAliasClash

Two imports bound the same local domain name to different domains (use a distinct AS <alias> to tell them apart).

Fields

alias: String

The clashing local domain name.

ImportNotFound(String)

An IMPORT target could not be loaded by the Resolver.

CircularImport(String)

Imports form a cycle (a source transitively imports itself).

RuleDisjunctiveConsequent

A RULE used OR in its THEN: forward chaining cannot derive a disjunction (it would not know which literal to assert). Model it as a PREMISE constraint instead.

Fields

name: String

The offending rule name.

UnknownValue(Box<UnknownValue>)

A reference used a value outside the closed set an ONEOF declared for that variable. Almost always a typo: the misspelling would otherwise mint a new atom that hangs in the air as UNKNOWN. Closed-world is opt-in — it only applies to a (subject, predicate) whose values an ONEOF enumerated. Boxed so this comparatively large payload does not bloat every Result.

Trait Implementations

impl Debug for CompileError

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

Formats the value using the given formatter.

impl Display for CompileError

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

Formats the value using the given formatter.

impl Eq for CompileError

impl Error for CompileError

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 CompileError

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CompileError