14.10 Fully recoverable hard failure

A fully recoverable hard failure is a recoverable Libmarpa application programming failure

• that has an error code associated with it; and
• after which all of the application behaviors remain available to the programmer.

One example of a fully recoverable hard failure is the error code MARPA_ERR_UNEXPECTED_TOKEN_ID. The “Ruby Slippers” parsing technique (see Ruby Slippers), which has seen extensive usage, is based on Libmarpa’s ability to recover from a MARPA_ERR_UNEXPECTED_TOKEN_ID error fully and efficiently,