parseOn method
Primitive method doing the actual parsing.
The method is overridden in concrete subclasses to implement the
parser specific logic. The methods takes a parse context
and
returns the resulting context, which is either a Success or
Failure context.
Implementation
@override
Result<List<R>> parseOn(Context context) {
var current = context;
final elements = <R>[];
while (elements.length < min) {
final result = delegate.parseOn(current);
if (result is Failure) return result;
elements.add(result.value);
current = result;
}
for (;;) {
final limiter = limit.parseOn(current);
if (limiter is Failure) {
if (elements.length >= max) return limiter;
final result = delegate.parseOn(current);
if (result is Failure) return limiter;
elements.add(result.value);
current = result;
} else {
return current.success(elements);
}
}
}