ecma-runtime-cat 0.3.2

ECMAScript runtime: native built-ins (console, Math, JSON, parseInt, isNaN, Promise, ...) that the boa-cat engine exposes to scripts. v0.3.2 adds `JSON.parse(source)` alongside the existing `JSON.stringify`: a hand-rolled recursive-descent JSON parser that handles null / booleans / numbers (including scientific notation) / strings (with `\"` / `\\` / control-character / `\uXXXX` escapes) / arrays / objects and rebuilds them as boa-cat `Value`s on the heap. Throws `SyntaxError` on malformed input; the heap is snapshotted and restored on the error path so partial allocations don't leak.
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//! Runtime error type.

use boa_cat::Error as EngineError;

/// All errors the runtime can produce.  Currently a thin wrapper around
/// [`boa_cat::Error`] since the runtime itself only contributes native
/// callables whose failures surface as `Outcome::Throw` values rather
/// than `Error`s.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum Error {
    /// An error from the boa-cat engine (lex/parse/syntax/fuel/uncaught
    /// exception).
    Engine(EngineError),
}

impl From<EngineError> for Error {
    fn from(value: EngineError) -> Self {
        Self::Engine(value)
    }
}

impl std::fmt::Display for Error {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Self::Engine(e) => write!(f, "engine error: {e}"),
        }
    }
}

impl std::error::Error for Error {}