Enum Error

pub enum Error {
    IoError {
        error: Error,
        context: String,
    },
    ParseError {
        msg: String,
        span: Span,
    },
    TypeError {
        msg: String,
        span: Span,
    },
    UnreachableError {
        msg: String,
        span: Span,
    },
    OverlapError {
        msg: String,
        rules: Vec<Span>,
    },
    ShadowedError {
        shadowed: Vec<Span>,
        mask: Span,
    },
}

Errors produced by ISLE.

Variants

IoError

An I/O error.

Fields

error: Error

The underlying I/O error.

context: String

The context explaining what caused the I/O error.

ParseError

The input ISLE source has a parse error.

Fields

msg: String

The error message.

span: Span

The location of the parse error.

TypeError

The input ISLE source has a type error.

Fields

msg: String

The error message.

span: Span

The location of the type error.

UnreachableError

The rule can never match any input.

Fields

msg: String

The error message.

span: Span

The location of the unreachable rule.

OverlapError

The rules mentioned overlap in the input they accept.

Fields

msg: String

The error message.

rules: Vec<Span>

The locations of all the rules that overlap. When there are more than two rules present, the first rule is the one with the most overlaps (likely a fall-through wildcard case).

ShadowedError

The rules can never match because another rule will always match first.

Fields

shadowed: Vec<Span>

The locations of the unmatchable rules.

mask: Span

The location of the rule that shadows them.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.