parseOn method
Parses the given context.
Overridden in concrete subclasses to implement the parser-specific logic.
Takes a parse context and returns the resulting context, which is either
a Success or Failure context.
Implementation
@override
Result<String> parseOn(Context context) {
if (message != null) {
// If we have a message we can switch to fast mode.
final position = delegate.fastParseOn(context.buffer, context.position);
if (position < 0) return context.failure(message!);
final output = context.buffer.substring(context.position, position);
return context.success(output, position);
} else {
final result = delegate.parseOn(context);
if (result is Failure) return result;
final output = context.buffer.substring(
context.position,
result.position,
);
return result.success(output);
}
}