25.12.6 Predicted and expected symbol instances

The one case where a single symbol instance can trigger events of two different types at the same parse location is that of the MARPA_EVENT_SYMBOL_PREDICTED and MARPA_EVENT_SYMBOL_EXPECTED events. That is,

• if j is a parse location;
• sym is the postdot symbol in an Earley item in the Earley set at j;
• sym is a terminal; and
• both event subtypes are activated,

then both a MARPA_EVENT_SYMBOL_PREDICTED and a MARPA_EVENT_SYMBOL_EXPECTED event will trigger at location start.