getPrecedenceStartState method
Get the start state for a specific precedence value.
@param precedence The current precedence. @return The start state corresponding to the specified precedence, or null if no start state exists for the specified precedence.
@throws IllegalStateException if this is not a precedence DFA. @see #isPrecedenceDfa()
Implementation
DFAState? getPrecedenceStartState(int precedence) {
if (!isPrecedenceDfa()) {
throw StateError(
'Only precedence DFAs may contain a precedence start state.');
}
// s0.edges is never null for a precedence DFA
if (precedence < 0 || precedence >= s0!.edges!.length) {
return null;
}
return s0!.edges![precedence];
}