Strict coding standard for Kotlin and a custom set of rules for detecting code smells, code style issues and bugs
| Diktat Rule | Code Style | Auto-fixed? | Chapter |
|---|---|---|---|
| VARIABLE_NAME_INCORRECT | 1.1.1 | no | Naming |
| VARIABLE_HAS_PREFIX | 1.1.1 | yes | Naming |
| IDENTIFIER_LENGTH | 1.1.1 | no | Naming |
| GENERIC_NAME | 1.1.1 | yes | Naming |
| BACKTICKS_PROHIBITED | 1.1.1 | no | Naming |
| FILE_NAME_INCORRECT | 1.1.1 | yes | Naming |
| EXCEPTION_SUFFIX | 1.1.1 | yes | Naming |
| CONFUSING_IDENTIFIER_NAMING | 1.1.1 | no | Naming |
| PACKAGE_NAME_MISSING | 1.2.1 | yes | Naming |
| PACKAGE_NAME_INCORRECT_CASE | 1.2.1 | yes | Naming |
| PACKAGE_NAME_INCORRECT_PREFIX | 1.2.1 | yes | Naming |
| PACKAGE_NAME_INCORRECT_SYMBOLS | 1.2.1 | no | Naming |
| PACKAGE_NAME_INCORRECT_PATH | 1.2.1 | yes | Naming |
| INCORRECT_PACKAGE_SEPARATOR | 1.2.1 | yes | Naming |
| CLASS_NAME_INCORRECT | 1.3.1 | yes | Naming |
| OBJECT_NAME_INCORRECT | 1.3.1 | yes | Naming |
| ENUM_VALUE | 1.3.1 | yes | Naming |
| TYPEALIAS_NAME_INCORRECT_CASE | 1.3.1 | yes | Naming |
| FUNCTION_NAME_INCORRECT_CASE | 1.4.1 | yes | Naming |
| CONSTANT_UPPERCASE | 1.5.1 | yes | Naming |
| VARIABLE_NAME_INCORRECT_FORMAT | 1.6.1 | yes | Naming |
| FUNCTION_BOOLEAN_PREFIX | 1.6.2 | yes | Naming |
| MISSING_KDOC_TOP_LEVEL | 2.1.1 | no | Comments |
| MISSING_KDOC_CLASS_ELEMENTS | 2.1.1 | no | Comments |
| MISSING_KDOC_ON_FUNCTION | 2.1.1 | yes | Comments |
| KDOC_NO_CONSTRUCTOR_PROPERTY | 2.1.1 | yes | Comments |
| KDOC_NO_CLASS_BODY_PROPERTIES_IN_HEADER | 2.1.1 | yes | Comments |
| KDOC_EXTRA_PROPERTY | 2.1.1 | no | Comments |
| KDOC_DUPLICATE_PROPERTY | 2.1.1 | no | Comments |
| KDOC_NO_CONSTRUCTOR_PROPERTY_WITH_COMMENT | 2.1.1 | yes | Comments |
| KDOC_WITHOUT_PARAM_TAG | 2.1.2 | yes | Comments |
| KDOC_WITHOUT_RETURN_TAG | 2.1.2 | yes | Comments |
| KDOC_WITHOUT_THROWS_TAG | 2.1.2 | yes | Comments |
| KDOC_EMPTY_KDOC | 2.1.3 | no | Comments |
| KDOC_WRONG_SPACES_AFTER_TAG | 2.1.3 | yes | Comments |
| KDOC_WRONG_TAGS_ORDER | 2.1.3 | yes | Comments |
| KDOC_NEWLINES_BEFORE_BASIC_TAGS | 2.1.3 | yes | Comments |
| KDOC_NO_NEWLINES_BETWEEN_BASIC_TAGS | 2.1.3 | yes | Comments |
| KDOC_NO_NEWLINE_AFTER_SPECIAL_TAGS | 2.1.3 | yes | Comments |
| KDOC_NO_DEPRECATED_TAG | 2.1.3 | yes | Comments |
| KDOC_CONTAINS_DATE_OR_AUTHOR | 2.1.3 | no | Comments |
| KDOC_NO_EMPTY_TAGS | 2.2.1 | no | Comments |
| HEADER_WRONG_FORMAT | 2.2.1 | yes | Comments |
| HEADER_MISSING_OR_WRONG_COPYRIGHT | 2.2.1 | yes | Comments |
| WRONG_COPYRIGHT_YEAR | 2.2.1 | yes | Comments |
| HEADER_MISSING_IN_NON_SINGLE_CLASS_FILE | 2.2.1 | no | Comments |
| HEADER_NOT_BEFORE_PACKAGE | 2.2.1 | yes | Comments |
| KDOC_TRIVIAL_KDOC_ON_FUNCTION | 2.3.1 | no | Comments |
| WRONG_NEWLINES_AROUND_KDOC | 2.4.1 | yes | Comments |
| FIRST_COMMENT_NO_BLANK_LINE | 2.4.1 | yes | Comments |
| COMMENT_WHITE_SPACE | 2.4.1 | yes | Comments |
| IF_ELSE_COMMENTS | 2.4.1 | yes | Comments |
| COMMENTED_OUT_CODE | 2.4.2 | no | Comments |
| FILE_IS_TOO_LONG | 3.1.1 | no | General |
| FILE_CONTAINS_ONLY_COMMENTS | 3.1.2 | no | General |
| FILE_INCORRECT_BLOCKS_ORDER | 3.1.2 | yes | General |
| FILE_NO_BLANK_LINE_BETWEEN_BLOCKS | 3.1.2 | yes | General |
| FILE_UNORDERED_IMPORTS | 3.1.2 | yes | General |
| FILE_WILDCARD_IMPORTS | 3.1.2 | no | General |
| UNUSED_IMPORT | 3.1.2 | yes | General |
| FILE_NAME_MATCH_CLASS | 3.1.2 | yes | General |
| WRONG_ORDER_IN_CLASS_LIKE_STRUCTURES | 3.1.4 | yes | General |
| BLANK_LINE_BETWEEN_PROPERTIES | 3.1.4 | yes | General |
| WRONG_DECLARATIONS_ORDER | 3.1.4 | yes | General |
| TOP_LEVEL_ORDER | 3.1.5 | yes | General |
| NO_BRACES_IN_CONDITIONALS_AND_LOOPS | 3.2.1 | yes | General |
| BRACES_BLOCK_STRUCTURE_ERROR | 3.2.2 | yes | General |
| WRONG_INDENTATION | 3.3.1 | yes | General |
| EMPTY_BLOCK_STRUCTURE_ERROR | 3.4.1 | yes | General |
| LONG_LINE | 3.5.1 | yes | General |
| MORE_THAN_ONE_STATEMENT_PER_LINE | 3.6.1 | yes | General |
| REDUNDANT_SEMICOLON | 3.6.2 | yes | General |
| WRONG_NEWLINES | 3.6.2 | yes | General |
| TRAILING_COMMA | 3.6.2 | yes | General |
| COMPLEX_EXPRESSION | 3.6.3 | no | General |
| COMPLEX_BOOLEAN_EXPRESSION | 3.6.4 | yes | General |
| TOO_MANY_BLANK_LINES | 3.7.1 | yes | General |
| WRONG_WHITESPACE | 3.8.1 | yes | General |
| TOO_MANY_CONSECUTIVE_SPACES | 3.8.1 | yes | General |
| ENUMS_SEPARATED | 3.9.1 | yes | General |
| LOCAL_VARIABLE_EARLY_DECLARATION | 3.10.2 | no | General |
| WHEN_WITHOUT_ELSE | 3.11.1 | yes | General |
| ANNOTATION_NEW_LINE | 3.12.1 | yes | General |
| WRONG_MULTIPLE_MODIFIERS_ORDER | 3.14.1 | yes | General |
| LONG_NUMERICAL_VALUES_SEPARATED | 3.14.2 | yes | General |
| MAGIC_NUMBER | 3.14.3 | no | General |
| STRING_CONCATENATION | 3.15.1 | yes | General |
| STRING_TEMPLATE_CURLY_BRACES | 3.15.2 | yes | General |
| STRING_TEMPLATE_QUOTES | 3.15.2 | yes | General |
| COLLAPSE_IF_STATEMENTS | 3.16.1 | yes | General |
| CONVENTIONAL_RANGE | 3.17.1 | yes | General |
| DEBUG_PRINT | 3.18.1 | no | General |
| FLOAT_IN_ACCURATE_CALCULATIONS | 4.1.1 | no | Variables |
| SAY_NO_TO_VAR | 4.1.3 | no | Variables |
| SMART_CAST_NEEDED | 4.2.1 | yes | Variables |
| TYPE_ALIAS | 4.2.2 | no | Variables |
| NULLABLE_PROPERTY_TYPE | 4.3.1 | yes | Variables |
| GENERIC_VARIABLE_WRONG_DECLARATION | 4.3.2 | yes | Variables |
| AVOID_NULL_CHECKS | 4.3.3 | yes | Variables |
| TOO_LONG_FUNCTION | 5.1.1 | no | Functions |
| NESTED_BLOCK | 5.1.2 | no | Functions |
| AVOID_NESTED_FUNCTIONS | 5.1.3 | yes | Functions |
| INVERSE_FUNCTION_PREFERRED | 5.1.4 | yes | Functions |
| LAMBDA_IS_NOT_LAST_PARAMETER | 5.2.1 | no | Functions |
| TOO_MANY_PARAMETERS | 5.2.2 | no | Functions |
| WRONG_OVERLOADING_FUNCTION_ARGUMENTS | 5.2.3 | no | Functions |
| RUN_BLOCKING_INSIDE_ASYNC | 5.2.4 | no | Functions |
| TOO_MANY_LINES_IN_LAMBDA | 5.2.5 | no | Functions |
| CUSTOM_LABEL | 5.2.6 | no | Functions |
| PARAMETER_NAME_IN_OUTER_LAMBDA | 5.2.7 | no | Functions |
| SINGLE_CONSTRUCTOR_SHOULD_BE_PRIMARY | 6.1.1 | yes | Classes |
| USE_DATA_CLASS | 6.1.2 | no | Classes |
| EMPTY_PRIMARY_CONSTRUCTOR | 6.1.3 | yes | Classes |
| MULTIPLE_INIT_BLOCKS | 6.1.4 | yes | Classes |
| USELESS_SUPERTYPE | 6.1.5 | yes | Classes |
| CLASS_SHOULD_NOT_BE_ABSTRACT | 6.1.6 | yes | Classes |
| NO_CORRESPONDING_PROPERTY | 6.1.7 | no | Classes |
| CUSTOM_GETTERS_SETTERS | 6.1.8 | no | Classes |
| WRONG_NAME_OF_VARIABLE_INSIDE_ACCESSOR | 6.1.9 | no | Classes |
| TRIVIAL_ACCESSORS_ARE_NOT_RECOMMENDED | 6.1.10 | yes | Classes |
| COMPACT_OBJECT_INITIALIZATION | 6.1.11 | yes | Classes |
| INLINE_CLASS_CAN_BE_USED | 6.1.12 | yes | Classes |
| EXTENSION_FUNCTION_SAME_SIGNATURE | 6.2.2 | no | Classes |
| EXTENSION_FUNCTION_WITH_CLASS | 6.2.3 | no | Classes |
| USE_LAST_INDEX | 6.2.4 | yes | Classes |
| AVOID_USING_UTILITY_CLASS | 6.4.1 | no | Classes |
| OBJECT_IS_PREFERRED | 6.4.2 | yes | Classes |
| RUN_IN_SCRIPT | 6.5.1 | yes | Classes |