Don't put any logic in createState DRT-W1023
DON'T put any logic in createState(). Implementations of createState() should return a new instance
Don't assign a variable to itself DRT-W1024
DON'T assign a variable to itself. Usually this is a mistake. BAD:
Don't use wildcard parameters or variables DRT-W1025
DON'T use wildcard parameters or variables. Wildcard parameters and local variables
Don't use the Null type, unless you are positive that you don't want void DRT-W1027
DON'T use the type Null where void would work. BAD:
Separate the control structure expression from its statement DRT-W1041
From the style guide for the flutter repo: DO separate the control structure expression from its statement.
Avoid unnecessary containers DRT-W1072
AVOID wrapping widgets in unnecessary containers. Wrapping a widget in Container with no other parameters set has no effect
Avoid empty else statements DRT-W1003
AVOID empty else statements. BAD:
Avoid final for parameter declarations DRT-W1054
AVOID declaring parameters as final. Declaring parameters as final can lead to unnecessarily verbose code, especially
Sort combinator names alphabetically DRT-W1080
DO sort combinator names alphabetically. BAD:
Avoid print calls in production code DRT-W1004
DO avoid print calls in production code. For production code, consider using a logging framework.
Don't use more than one case with same value DRT-W1022
DON'T use more than one case with same value. This is usually a typo or changed value of constant.
Sort pub dependencies alphabetically DRT-W1039
DO sort pub dependencies alphabetically (A to Z) in pubspec.yaml. Sorting list of pub dependencies makes maintenance easier.
Avoid bool literals in conditional expressions DRT-W1046
AVOID bool literals in conditional expressions. BAD:
Avoid shadowing type parameters DRT-W1069
AVOID shadowing type parameters. BAD:
Name extensions using UpperCamelCase DRT-W1076
From Effective Dart: DO name extensions using UpperCamelCase.
Prefer using lowerCamelCase for constant names DRT-W1082
PREFER using lowerCamelCase for constant names. In new code, use lowerCamelCase for constant variables, including enum values.
Attach library doc comments to library directives DRT-W1084
Attach library doc comments (with ///) to library directives, rather than leaving them dangling near the top of a library.
Deprecated member used in the same package DRT-W1015
The analyzer produces this diagnostic when a deprecated library member or class member is used in the same package in which it's declared.
Prefer relative imports for files in lib/ DRT-W1026
PREFER relative imports for files in lib/. When mixing relative and absolute imports it's possible to create confusion
Avoid relative imports for files in lib/ DRT-W1001
DO avoid relative imports for files in lib/. When mixing relative and absolute imports it's possible to create confusion