when<TResult extends Object?> method

  1. @optionalTypeArgs
TResult when<TResult extends Object?>({
  1. required TResult context(
    1. T? builder(
      1. BuildContext context
      )
    ),
  2. required TResult ref(
    1. T? builder(
      1. ProviderReader reader
      )
    ),
  3. required TResult value(
    1. T? value
    ),
})

A switch-like method, using callbacks.

As opposed to map, this offers destructuring. It is equivalent to doing:

switch (sealedClass) {
  case Subclass(:final field):
    return ...;
  case Subclass2(:final field2):
    return ...;
}

Implementation

@optionalTypeArgs TResult when<TResult extends Object?>({required TResult Function( T? Function(BuildContext context) builder)  context,required TResult Function( T? Function(ProviderReader reader) builder)  ref,required TResult Function( T? value)  value,}) {final _that = this;
switch (_that) {
case _ValueBuilderContext():
return context(_that.builder);case _ValueBuilderRef():
return ref(_that.builder);case _ValueBuilderValue():
return value(_that.value);}
}