when<T> method
T?
when<T>({
- T isExpression()?,
- T isLimit()?,
- T isOrderingTerm()?,
- T isOrderBy()?,
- T isInsertable()?,
Implementation
T? when<T>({
T Function(DartExpressionPlaceholder)? isExpression,
T Function(DartLimitPlaceholder)? isLimit,
T Function(DartOrderingTermPlaceholder)? isOrderingTerm,
T Function(DartOrderByPlaceholder)? isOrderBy,
T Function(DartInsertablePlaceholder)? isInsertable,
}) {
if (this is DartExpressionPlaceholder) {
return isExpression?.call(this as DartExpressionPlaceholder);
} else if (this is DartLimitPlaceholder) {
return isLimit?.call(this as DartLimitPlaceholder);
} else if (this is DartOrderingTermPlaceholder) {
return isOrderingTerm?.call(this as DartOrderingTermPlaceholder);
} else if (this is DartOrderByPlaceholder) {
return isOrderBy?.call(this as DartOrderByPlaceholder);
} else if (this is DartInsertablePlaceholder) {
return isInsertable?.call(this as DartInsertablePlaceholder);
}
throw AssertionError('Invalid placeholder: $runtimeType');
}