metis.exception

Utilities for working with errors and exceptions.

rethrow(message, context)Source

Rethrow an exception that occurred within a child coroutine.

This integrates with CC:T's exception protocol, to ensure friendlier error reporting in the shell. This

Parameters

1. message The error message.
2. context coroutine The thread executing this code.

Usage

• Define a function checked_resume, which attempts to resume a coroutine, and rethrows any errors using rethrow.

  local rethrow = require "metis.exception".rethrow
  local function checked_resume(co, ...)
    local ok, result = coroutine.resume(co, ...)
    if not ok then rethrow(co, result) end
    return result
  end