when<T> method

T when<T>({ required T string(StringValueNode), required T int_(IntValueNode), required T float(FloatValueNode), required T boolean(BooleanValueNode), required T object(ObjectValueNode), required T list(ListValueNode), required T enum_(EnumValueNode), required T null_(NullValueNode), required T variable(VariableNode), })

Executes the given callback when this is of the type parameter

Implementation

T when<T>({
  required T Function(ast.StringValueNode) string,
  required T Function(ast.IntValueNode) int_,
  required T Function(ast.FloatValueNode) float,
  required T Function(ast.BooleanValueNode) boolean,
  required T Function(ast.ObjectValueNode) object,
  required T Function(ast.ListValueNode) list,
  required T Function(ast.EnumValueNode) enum_,
  required T Function(ast.NullValueNode) null_,
  required T Function(ast.VariableNode) variable,
}) {
  final v = this;
  if (v is ast.StringValueNode) return string(v);
  if (v is ast.IntValueNode) return int_(v);
  if (v is ast.FloatValueNode) return float(v);
  if (v is ast.BooleanValueNode) return boolean(v);
  if (v is ast.ObjectValueNode) return object(v);
  if (v is ast.ListValueNode) return list(v);
  if (v is ast.EnumValueNode) return enum_(v);
  if (v is ast.NullValueNode) return null_(v);
  if (v is ast.VariableNode) return variable(v);
  throw Error();
}