Enum QueryResult 

pub enum QueryResult {
    Solutions,
    ParseError(String),
    RuntimeError(String),
}

Outcome of running one query, with the prefixed message the v1 contract puts on the wire for the two failure classes. The caller maps these to its own surface — exit codes 2/3 for the CLI, an {"error":...} object for the reactor — but the message bytes are produced once, here.

Variants

Solutions

Solved; solutions live in m.solutions.

ParseError(String)

Query failed to parse — "Parse error: …" (CLI exit 2).

RuntimeError(String)

A runtime error was raised — "Runtime error: …" (CLI exit 3).