error.md

error

Error construction and inspection. import error.

error.context(r: Result[T, E], msg: String) -> Result[T, String]

Add context message to an error result.

error.context(result, "failed to load config")

error.message(r: Result[T, String]) -> String

Extract the error message from a Result, or empty string if ok.

error.message(err("oops")) // => "oops"

error.chain(outer: String, cause: String) -> String

Chain two error messages with a cause separator.

error.chain("load failed", "file not found") // => "load failed: file not found"