Migration guide for describeEnum and EnumProperty
Summary
#The global method describeEnum
has been deprecated. Previous uses
of describeEnum(Enum.something)
should use
Enum.something.name
instead.
The class EnumProperty
was modified to
extend <T extends Enum?>
instead of <T>
.
Existing uses of EnumProperty<NotAnEnum>
should
use DiagnosticsProperty<NotAnEnum>
instead.
Context
#Dart 2.17 introduced enhanced enums, which added Enum
as a type.
As a result, all enums got a name
getter, which made describeEnum
redundant. Before that, enum classes were often analyzed using an
EnumProperty
.
The describeEnum
method was used to convert an enum value to a string,
since Enum.something.toString()
would produce Enum.something
instead
of something
, which a lot of users wanted. Now, the name
getter does this.
The describeEnum
function is being deprecated,
so the EnumProperty
class is updated to only accept Enum
objects.
Description of change
#Remove describeEnum
.
- Replace
describeEnum(Enum.something)
withEnum.something.name
.
The EnumProperty
now expects null or an Enum
;
you can no longer pass it a non-Enum
class.
Migration guide
#If you previously used describeEnum(Enum.field)
to access the
string value from an enum, you can now call Enum.field.name
.
If you previously used EnumProperty<NotAnEnum>
, you can
now use the generic DiagnosticsProperty<NotAnEnum>
.
Code before migration:
enum MyEnum { paper, rock }
print(describeEnum(MyEnum.paper)); // output: paper
// TextInputType is not an Enum
properties.add(EnumProperty<TextInputType>( ... ));
Code after migration:
enum MyEnum { paper, rock }
print(MyEnum.paper.name); // output: paper
// TextInputType is not an Enum
properties.add(DiagnosticsProperty<TextInputType>( ... ));
Timeline
#Landed in version: 3.14.0-2.0.pre
In stable release: 3.16
References
#API documentation:
Relevant issues:
Relevant PRs:
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