Apply elm-upgrade

elm.json

@@ -1,11 +1,9 @@
 {
-    "version": "2.0.1",
+    "type": "package",
+    "name": "jfmengels/elm-lint",
     "summary": "A linter for Elm. Get your code from correct to better.",
-    "repository": "https://github.com/jfmengels/elm-lint.git",
-    "license": "BSD3",
-    "source-directories": [
-        "src"
-    ],
+    "license": "BSD-3-Clause",
+    "version": "2.0.1",
     "exposed-modules": [
         "Lint",
         "Lint.Types",
@@ -25,12 +23,12 @@
         "Lint.Rules.SimplifyPropertyAccess",
         "Lint.Rules.ElmTest.NoDuplicateTestBodies"
     ],
+    "elm-version": "0.19.0 <= v < 0.20.0",
     "dependencies": {
-        "Bogdanp/elm-ast": "8.0.3 <= v < 9.0.0",
-        "elm-community/list-extra": "5.0.1 <= v < 6.0.0",
-        "elm-community/parser-combinators": "1.1.0 <= v < 2.0.0",
-        "elm-lang/core": "5.0.0 <= v < 6.0.0",
-        "elm-lang/html": "2.0.0 <= v < 3.0.0"
+        "elm/core": "1.0.0 <= v < 2.0.0",
+        "elm/html": "1.0.0 <= v < 2.0.0",
+        "elm/regex": "1.0.0 <= v < 2.0.0",
+        "elm-community/list-extra": "8.1.0 <= v < 9.0.0"
     },
-    "elm-version": "0.18.0 <= v < 0.19.0"
+    "test-dependencies": {}
 }

src/Lint/Rules/DefaultPatternPosition.elm

@@ -1,8 +1,10 @@
 module Lint.Rules.DefaultPatternPosition exposing (rule, Configuration, PatternPosition(..))
 
 {-|
+
 @docs rule, Configuration, PatternPosition
 
+
 # Fail
 
     rules =
@@ -25,6 +27,7 @@ module Lint.Rules.DefaultPatternPosition exposing (rule, Configuration, PatternP
       -- LintError, this pattern should appear first
       _ -> result
 
+
 # Success
 
     rules =
@@ -49,11 +52,12 @@ module Lint.Rules.DefaultPatternPosition exposing (rule, Configuration, PatternP
     case value of
       _ -> result
       Foo -> bar
+
 -}
 
 import Ast.Expression exposing (..)
 import Lint exposing (doNothing, lint)
-import Lint.Types exposing (LintRule, Direction(..), LintError, LintRuleImplementation)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 import List.Extra exposing (findIndex)
 import Regex
 
@@ -88,7 +92,7 @@ implementation configuration =
     { statementFn = doNothing
     , typeFn = doNothing
     , expressionFn = expressionFn configuration
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context
     }
 
@@ -113,6 +117,7 @@ isDefaultPattern pattern =
         Variable names ->
             if isVariable (String.join "." names) then
                 True
+
             else
                 False
 
@@ -138,12 +143,14 @@ expressionFn config ctx node =
                         First ->
                             if index /= 0 then
                                 ( [ error "Expected default pattern to appear first in the list of patterns" ], ctx )
+
                             else
                                 ( [], ctx )
 
                         Last ->
-                            if index /= (List.length patterns) - 1 then
+                            if index /= List.length patterns - 1 then
                                 ( [ error "Expected default pattern to appear last in the list of patterns" ], ctx )
+
                             else
                                 ( [], ctx )
 

src/Lint/Rules/ElmTest/NoDuplicateTestBodies.elm

@@ -1,44 +1,52 @@
 module Lint.Rules.ElmTest.NoDuplicateTestBodies exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
-    module Addition exposing (..)
-
     import Test exposing (test)
 
     tests =
         [ test "foo" <|
-            \() -> 1 + 1
-                |> Expect.equal 2
+            \() ->
+                1
+                    + 1
+                    |> Expect.equal 2
         , test "bar" <|
-            \() -> 1 + 1
-                |> Expect.equal 2
+            \() ->
+                1
+                    + 1
+                    |> Expect.equal 2
         ]
 
+
 # Success
 
-    module Addition exposing (..)
-
     import Test exposing (test)
 
     tests =
         [ test "foo" <|
-            \() -> 1 + 1
-                |> Expect.equal 2
+            \() ->
+                1
+                    + 1
+                    |> Expect.equal 2
         , test "bar" <|
-            \() -> 1 + 2
-                |> Expect.equal 3
+            \() ->
+                1
+                    + 2
+                    |> Expect.equal 3
         ]
+
 -}
 
 import Ast.Expression exposing (..)
 import Ast.Statement exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
 import Dict exposing (Dict)
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 
 
 type alias Context =
@@ -53,6 +61,7 @@ This may result in specifications that are thought to be implemented but are not
     rules =
         [ ElmTest.NoDuplicateTestBodies.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -64,7 +73,7 @@ implementation =
     { statementFn = statementFn
     , typeFn = doNothing
     , expressionFn = expressionFn
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context []
     }
 
@@ -97,6 +106,7 @@ filterTests availableTestAliases listItems =
                 BinOp (Variable [ "<|" ]) (Application fn (String title)) testBody ->
                     if isTestFunctionCall availableTestAliases fn then
                         [ ( title, testBody ) ]
+
                     else
                         []
 
@@ -124,17 +134,17 @@ expressionFn ctx node =
                                 existingTest =
                                     Dict.get testBodyAsString dict
                             in
-                                case existingTest of
-                                    Nothing ->
-                                        { dict = Dict.insert testBodyAsString title dict, redundant = redundant }
+                            case existingTest of
+                                Nothing ->
+                                    { dict = Dict.insert testBodyAsString title dict, redundant = redundant }
 
-                                    Just existingTestTitle ->
-                                        { dict = dict, redundant = redundant ++ [ ( title, existingTestTitle ) ] }
+                                Just existingTestTitle ->
+                                    { dict = dict, redundant = redundant ++ [ ( title, existingTestTitle ) ] }
                         )
                         { dict = Dict.empty, redundant = [] }
                         tests
             in
-                ( List.map error redundantTests.redundant, ctx )
+            ( List.map error redundantTests.redundant, ctx )
 
         _ ->
             ( [], ctx )
@@ -152,6 +162,7 @@ extractImported exportSet =
         FunctionExport name ->
             if name == "test" then
                 [ name ]
+
             else
                 []
 
@@ -172,12 +183,12 @@ statementFn ctx node =
                 moduleFnAccess =
                     computeAlias testAlias ++ ".test"
             in
-                case exportSet of
-                    Nothing ->
-                        ( [], { availableTestAliases = [ moduleFnAccess ] } )
+            case exportSet of
+                Nothing ->
+                    ( [], { availableTestAliases = [ moduleFnAccess ] } )
 
-                    Just subExportSet ->
-                        ( [], { availableTestAliases = [ moduleFnAccess ] ++ extractImported subExportSet } )
+                Just subExportSet ->
+                    ( [], { availableTestAliases = [ moduleFnAccess ] ++ extractImported subExportSet } )
 
         _ ->
             ( [], ctx )

src/Lint/Rules/NoConstantCondition.elm

@@ -1,22 +1,44 @@
 module Lint.Rules.NoConstantCondition exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
-    if True then a else b
-    if False then a else b
-    if foo == foo then a else b
+    if True then
+        a
+
+    else
+        b
+
+    if False then
+        a
+
+    else
+        b
+
+    if foo == foo then
+        a
+
+    else
+        b
+
 
 # Success
 
-    if foo == bar then a else b
+    if foo == bar then
+        a
+
+    else
+        b
+
 -}
 
 import Ast.Expression exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 import Set exposing (Set)
 
 
@@ -29,6 +51,7 @@ type alias Context =
     rules =
         [ NoConstantCondition.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -40,7 +63,7 @@ implementation =
     { statementFn = doNothing
     , typeFn = doNothing
     , expressionFn = expressionFn
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context
     }
 
@@ -74,6 +97,7 @@ isStatic expr =
         Variable value ->
             if isStaticVariable value then
                 True
+
             else
                 False
 
@@ -87,7 +111,7 @@ isStatic expr =
             True
 
         BinOp (Variable op) left right ->
-            (Set.member op comparisonOperators)
+            Set.member op comparisonOperators
                 && (left == right || (isStatic left && isStatic right))
 
         _ ->
@@ -100,6 +124,7 @@ expressionFn ctx node =
         Enter (If cond _ _) ->
             if isStatic cond then
                 ( [ error ], ctx )
+
             else
                 ( [], ctx )
 

src/Lint/Rules/NoDebug.elm

@@ -1,27 +1,38 @@
 module Lint.Rules.NoDebug exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
-    if Debug.log "condition" condition then a else b
+    if Debug.log "condition" condition then
+        a
+
+    else
+        b
+
     if condition then
         Debug.crash "Nooo!"
+
     else
         value
 
+
 # Success
 
     if condition then
         a
+
     else
         b
+
 -}
 
 import Ast.Expression exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 
 
 type alias Context =
@@ -33,6 +44,7 @@ type alias Context =
     rules =
         [ NoDebug.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -44,7 +56,7 @@ implementation =
     { statementFn = doNothing
     , typeFn = doNothing
     , expressionFn = expressionFn
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context
     }
 
@@ -60,6 +72,7 @@ expressionFn ctx node =
         Enter (Variable vars) ->
             if List.member "Debug" vars then
                 ( [ error ], ctx )
+
             else
                 ( [], ctx )
 

src/Lint/Rules/NoDuplicateImports.elm

@@ -1,21 +1,25 @@
 module Lint.Rules.NoDuplicateImports exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
     import Set
     import Set exposing (Set)
 
+
 # Success
 
     import Set exposing (Set)
+
 -}
 
 import Ast.Statement exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 import Set exposing (Set)
 
 
@@ -30,6 +34,7 @@ type alias Context =
     rules =
         [ NoDuplicateImports.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -59,10 +64,11 @@ statementFn ctx node =
                 name =
                     String.join "." names
             in
-                if Set.member name ctx.imports then
-                    ( [], { ctx | duplicates = Set.insert name ctx.duplicates } )
-                else
-                    ( [], { ctx | imports = Set.insert name ctx.imports } )
+            if Set.member name ctx.imports then
+                ( [], { ctx | duplicates = Set.insert name ctx.duplicates } )
+
+            else
+                ( [], { ctx | imports = Set.insert name ctx.imports } )
 
         _ ->
             ( [], ctx )
@@ -75,4 +81,4 @@ moduleEndFn ctx =
             Set.toList ctx.duplicates
                 |> List.map error
     in
-        ( errors, ctx )
+    ( errors, ctx )

src/Lint/Rules/NoImportingEverything.elm

@@ -1,21 +1,25 @@
 module Lint.Rules.NoImportingEverything exposing (rule, Configuration)
 
 {-|
+
 @docs rule, Configuration
 
+
 # Fail
 
     import Html exposing (..)
 
+
 # Success
 
     import Html exposing (div, p, textarea)
+
 -}
 
-import Set exposing (Set)
 import Ast.Statement exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
+import Set exposing (Set)
 
 
 type alias Context =
@@ -32,8 +36,9 @@ type alias Configuration =
 functions and types are unknown to them.
 
     rules =
-        [ NoImportingEverything.rule { exceptions = ["Html"]}
+        [ NoImportingEverything.rule { exceptions = [ "Html" ] }
         ]
+
 -}
 rule : Configuration -> LintRule
 rule exceptions input =
@@ -45,7 +50,7 @@ implementation config =
     { statementFn = statementFn
     , typeFn = doNothing
     , expressionFn = doNothing
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context (Set.fromList config.exceptions)
     }
 
@@ -63,10 +68,11 @@ statementFn ctx node =
                 name =
                     String.join "." names
             in
-                if Set.member name ctx.exceptions then
-                    ( [], ctx )
-                else
-                    ( [ error name ], ctx )
+            if Set.member name ctx.exceptions then
+                ( [], ctx )
+
+            else
+                ( [ error name ], ctx )
 
         _ ->
             ( [], ctx )

src/Lint/Rules/NoUnannotatedFunction.elm

@@ -1,23 +1,27 @@
 module Lint.Rules.NoUnannotatedFunction exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
     a n =
         n + 1
 
+
 # Success
 
     a : Int -> Int
     a n =
         n + 1
+
 -}
 
 import Ast.Statement exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 import Set exposing (Set)
 
 
@@ -31,6 +35,7 @@ type alias Context =
     rules =
         [ NoUnannotatedFunction.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -42,7 +47,7 @@ implementation =
     { statementFn = statementFn
     , typeFn = doNothing
     , expressionFn = doNothing
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context Set.empty
     }
 
@@ -61,6 +66,7 @@ statementFn ctx node =
         Enter (FunctionDeclaration name params body) ->
             if Set.member name ctx.annotatedFunctions then
                 ( [], ctx )
+
             else
                 ( [ createError name ], ctx )
 

src/Lint/Rules/NoUnusedVariables.elm

@@ -1,26 +1,32 @@
 module Lint.Rules.NoUnusedVariables exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
-    module Main exposing (a)
+
     a n =
         n + 1
-    b = a 2
+
+    b =
+        a 2
+
 
 # Success
 
-    module Main exposing (a)
+
     a n =
         n + 1
+
 -}
 
 import Ast.Expression exposing (..)
 import Ast.Statement exposing (..)
 import Lint exposing (doNothing, lint)
-import Lint.Types exposing (LintRule, Direction(..), LintError, LintRuleImplementation)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 import Set exposing (Set)
 
 
@@ -46,6 +52,7 @@ emptyScope =
     rules =
         [ NoUnusedVariables.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -78,7 +85,7 @@ addUsedToStack scopes variables =
                 Just scope ->
                     { scope | used = Set.union scope.used (Set.fromList variables) }
     in
-        lastScope :: (List.drop 1 scopes)
+    lastScope :: List.drop 1 scopes
 
 
 addFoundToStack : List Scope -> List String -> List Scope
@@ -92,7 +99,7 @@ addFoundToStack scopes variables =
                 Just scope ->
                     { scope | declared = Set.union scope.declared (Set.fromList variables) }
     in
-        lastScope :: (List.drop 1 scopes)
+    lastScope :: List.drop 1 scopes
 
 
 makeReport : Maybe Scope -> ( List LintError, Set String )
@@ -115,7 +122,7 @@ makeReport scope =
                         |> List.sort
                         |> List.map createError
             in
-                ( errors, variablesUsedButNotFromThisScope )
+            ( errors, variablesUsedButNotFromThisScope )
 
 
 variableName : Expression -> Maybe (List String)
@@ -153,7 +160,7 @@ expressionFn ctx node =
                 newScope =
                     Scope variables Set.empty
             in
-                ( [], { ctx | scopes = newScope :: ctx.scopes } )
+            ( [], { ctx | scopes = newScope :: ctx.scopes } )
 
         Exit (Let _ _) ->
             let
@@ -165,7 +172,7 @@ expressionFn ctx node =
                 newScopes =
                     List.drop 1 ctx.scopes
             in
-                ( errors, { ctx | scopes = addUsedToStack newScopes (Set.toList variablesUsedButNotFromThisScope) } )
+            ( errors, { ctx | scopes = addUsedToStack newScopes (Set.toList variablesUsedButNotFromThisScope) } )
 
         _ ->
             ( [], ctx )
@@ -226,7 +233,7 @@ statementFn ctx node =
                         []
                         imported
             in
-                ( [], { ctx | scopes = addFoundToStack ctx.scopes variables } )
+            ( [], { ctx | scopes = addFoundToStack ctx.scopes variables } )
 
         Enter (ModuleDeclaration names exportType) ->
             ( [], addExposedVariables ctx exportType )
@@ -244,9 +251,10 @@ moduleEndFn ctx =
         ( errors, _ ) =
             if ctx.exportsEverything then
                 ( [], Set.empty )
+
             else
                 ctx.scopes
                     |> List.head
                     |> makeReport
     in
-        ( errors, ctx )
+    ( errors, ctx )

src/Lint/Rules/NoUselessIf.elm

@@ -1,26 +1,32 @@
 module Lint.Rules.NoUselessIf exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
     if condition then
         value
+
     else
         value
 
+
 # Success
 
     if condition then
         value1
+
     else
         value2
+
 -}
 
 import Ast.Expression exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 
 
 type alias Context =
@@ -32,6 +38,7 @@ type alias Context =
     rules =
         [ NoUselessIf.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -43,7 +50,7 @@ implementation =
     { statementFn = doNothing
     , typeFn = doNothing
     , expressionFn = expressionFn
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context
     }
 
@@ -59,6 +66,7 @@ expressionFn ctx node =
         Enter (If cond then_ else_) ->
             if then_ == else_ then
                 ( [ error ], ctx )
+
             else
                 ( [], ctx )
 

src/Lint/Rules/NoUselessPatternMatching.elm

@@ -1,37 +1,59 @@
 module Lint.Rules.NoUselessPatternMatching exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
     -- Useless pattern matching
     case value of
-        Foo -> 1
-        Bar -> 1
-        _ -> 1
+        Foo ->
+            1
+
+        Bar ->
+            1
+
+        _ ->
+            1
 
     -- Useless pattern `Bar`, it's the same as the default pattern
     case value of
-        Foo -> 2
-        Bar -> 1
-        _ -> 1
+        Foo ->
+            2
+
+        Bar ->
+            1
+
+        _ ->
+            1
+
 
 # Success
 
     case value of
-        Foo -> 1
-        Bar -> 2
-        _ -> 3
+        Foo ->
+            1
+
+        Bar ->
+            2
+
+        _ ->
+            3
 
     case value of
-        Foo n -> n
-        Bar n -> n
+        Foo n ->
+            n
+
+        Bar n ->
+            n
+
 -}
 
 import Ast.Expression exposing (..)
-import Lint exposing (lint, visitExpression, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Lint exposing (doNothing, lint, visitExpression)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 import Regex
 import Set exposing (Set)
 
@@ -46,6 +68,7 @@ pattern will lead to the same value as the default pattern.
     rules =
         [ NoUselessPatternMatching.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -57,7 +80,7 @@ implementation =
     { statementFn = doNothing
     , typeFn = doNothing
     , expressionFn = expressionFn
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context
     }
 
@@ -67,7 +90,7 @@ variableFinder =
     { statementFn = doNothing
     , typeFn = doNothing
     , expressionFn = findVariable
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Set.empty
     }
 
@@ -104,7 +127,7 @@ subPatternMatchingVariables pattern =
             [ String.join "." a ]
 
         Application object variable ->
-            (subPatternMatchingVariables object) ++ (subPatternMatchingVariables variable)
+            subPatternMatchingVariables object ++ subPatternMatchingVariables variable
 
         _ ->
             []
@@ -145,7 +168,7 @@ patternsAreAllTheSame patterns =
                 |> Set.fromList
                 |> (\set -> Set.size set == 1)
     in
-        (not anyUseVariables) && bodiesAreIdentical
+    not anyUseVariables && bodiesAreIdentical
 
 
 defaultPattern : List ( Expression, Expression, Set String, Set String ) -> Maybe ( Expression, Expression, Set String, Set String )
@@ -161,6 +184,7 @@ defaultPattern patterns =
                         Variable names ->
                             if isVariable (String.join "." names) then
                                 Just ( pattern, body, used, declared )
+
                             else
                                 Nothing
 
@@ -193,18 +217,17 @@ thereAreUselessPatterns patterns =
         justDefault =
             Maybe.withDefault ( Integer 1, Integer 1, Set.empty, Set.empty ) default
     in
-        hasDefault
-            && (List.foldl
-                    (\pattern res ->
-                        res
-                            || ((pattern /= justDefault)
-                                    && (patternBody pattern == patternBody justDefault)
-                                    && not (usesIntroducedVariable pattern)
-                               )
-                    )
-                    False
-                    patterns
-               )
+    hasDefault
+        && List.foldl
+            (\pattern res ->
+                res
+                    || ((pattern /= justDefault)
+                            && (patternBody pattern == patternBody justDefault)
+                            && not (usesIntroducedVariable pattern)
+                       )
+            )
+            False
+            patterns
 
 
 expressionFn : Context -> Direction Expression -> ( List LintError, Context )
@@ -219,12 +242,14 @@ expressionFn ctx node =
                                 ( pattern, body, Tuple.second <| visitExpression variableFinder body, patternMatchingVariables pattern )
                             )
             in
-                if patternsAreAllTheSame analyzedPatterns then
-                    ( [ uselessPatternMatchingError ], ctx )
-                else if thereAreUselessPatterns analyzedPatterns then
-                    ( [ uselessPatternError ], ctx )
-                else
-                    ( [], ctx )
+            if patternsAreAllTheSame analyzedPatterns then
+                ( [ uselessPatternMatchingError ], ctx )
+
+            else if thereAreUselessPatterns analyzedPatterns then
+                ( [ uselessPatternError ], ctx )
+
+            else
+                ( [], ctx )
 
         _ ->
             ( [], ctx )

src/Lint/Rules/NoWarningComments.elm

@@ -1,22 +1,30 @@
 module Lint.Rules.NoWarningComments exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
     -- TODO Refactor this part of the code
     -- FIXME Broken because of...
     -- XXX This should not be done like this
 
+
+
+
 # Success
 
     -- Regular comment
+
+
+
 -}
 
 import Ast.Statement exposing (..)
 import Lint exposing (doNothing, lint)
-import Lint.Types exposing (LintRule, Direction(..), LintError, LintRuleImplementation)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 
 
 type alias Context =
@@ -28,6 +36,7 @@ type alias Context =
     rules =
         [ NoWarningComments.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -39,7 +48,7 @@ implementation =
     { statementFn = statementFn
     , typeFn = doNothing
     , expressionFn = doNothing
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context
     }
 
@@ -53,16 +62,22 @@ findWarning : String -> Maybe LintError
 findWarning text =
     if String.contains "TODO" text then
         Just <| error "TODO"
+
     else if String.contains "todo" text then
         Just <| error "todo"
+
     else if String.contains "FIXME" text then
         Just <| error "FIXME"
+
     else if String.contains "fixme" text then
         Just <| error "fixme"
+
     else if String.contains "XXX" text then
         Just <| error "XXX"
+
     else if String.contains "xxx" text then
         Just <| error "xxx"
+
     else
         Nothing
 
@@ -75,12 +90,12 @@ statementFn ctx node =
                 warning =
                     findWarning text
             in
-                case warning of
-                    Just err ->
-                        ( [ err ], ctx )
+            case warning of
+                Just err ->
+                    ( [ err ], ctx )
 
-                    Nothing ->
-                        ( [], ctx )
+                Nothing ->
+                    ( [], ctx )
 
         _ ->
             ( [], ctx )

src/Lint/Rules/SimplifyPiping.elm

@@ -1,23 +1,29 @@
 module Lint.Rules.SimplifyPiping exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
-    a = values
-        |> List.map foo
-        |> List.map bar
+    a =
+        values
+            |> List.map foo
+            |> List.map bar
+
 
 # Success
 
-    a = values
-        |> List.map (foo >> bar)
+    a =
+        values
+            |> List.map (foo >> bar)
+
 -}
 
 import Ast.Expression exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 import Set exposing (Set)
 
 
@@ -30,6 +36,7 @@ type alias Context =
     rules =
         [ SimplifyPiping.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -41,7 +48,7 @@ implementation =
     { statementFn = doNothing
     , typeFn = doNothing
     , expressionFn = expressionFn
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context
     }
 
@@ -76,6 +83,7 @@ reportIfSimplifiableMethod op left right =
         [ Application (Access (Variable names1) fns1) _, Application (Access (Variable names2) fns2) _ ] ->
             if [ names1, fns1 ] == [ names2, fns2 ] && Set.member (nameOfMethod [ names1, fns1 ]) simplifiableFns then
                 [ error op <| nameOfMethod [ names1, fns1 ] ]
+
             else
                 []
 

src/Lint/Rules/SimplifyPropertyAccess.elm

@@ -1,21 +1,27 @@
 module Lint.Rules.SimplifyPropertyAccess exposing (rule)
 
 {-|
+
 @docs rule
 
+
 # Fail
 
-    a = List.map (\x -> x.foo) values
+    a =
+        List.map (\x -> x.foo) values
+
 
 # Success
 
-    a = List.map .foo values
+    a =
+        List.map .foo values
+
 -}
 
-import Ast.Statement exposing (..)
 import Ast.Expression exposing (..)
-import Lint exposing (lint, doNothing)
-import Lint.Types exposing (LintRule, LintRuleImplementation, LintError, Direction(..))
+import Ast.Statement exposing (..)
+import Lint exposing (doNothing, lint)
+import Lint.Types exposing (Direction(..), LintError, LintRule, LintRuleImplementation)
 
 
 type alias Context =
@@ -27,6 +33,7 @@ type alias Context =
     rules =
         [ SimplifyPropertyAccess.rule
         ]
+
 -}
 rule : LintRule
 rule input =
@@ -38,7 +45,7 @@ implementation =
     { statementFn = statementFn
     , typeFn = doNothing
     , expressionFn = expressionFn
-    , moduleEndFn = (\ctx -> ( [], ctx ))
+    , moduleEndFn = \ctx -> ( [], ctx )
     , initialContext = Context
     }
 
@@ -54,6 +61,7 @@ expressionFn ctx node =
         Enter (Lambda [ Variable paramNames ] (Access (Variable varName) properties)) ->
             if List.length properties == 1 && varName == paramNames then
                 ( [ String.join "" properties |> error ], ctx )
+
             else
                 ( [], ctx )
 
@@ -67,6 +75,7 @@ statementFn ctx node =
         Enter (FunctionDeclaration _ [ Variable paramNames ] (Access (Variable varName) properties)) ->
             if List.length properties == 1 && varName == paramNames then
                 ( [ String.join "" properties |> error ], ctx )
+
             else
                 ( [], ctx )
 

src/Lint/Types.elm

@@ -1,31 +1,32 @@
-module Lint.Types
-    exposing
-        ( Direction(..)
-        , File
-        , LintError
-        , LintImplementation
-        , LintResult
-        , LintRule
-        , LintRuleImplementation
-        , Reporter
-        , Severity
-        , Severity(..)
-        , Visitor
-        )
+module Lint.Types exposing
+    ( LintError, Direction(..)
+    , LintRule, Severity(..), Reporter
+    , LintRuleImplementation, LintImplementation
+    , Visitor, LintResult, File
+    )
 
 {-| This module contains types that are used for writing rules.
 
+
 # Elementary types
+
 @docs LintError, Direction
 
+
 # Configuration
+
 @docs LintRule, Severity, Reporter
 
+
 # Writing rules
+
 @docs LintRuleImplementation, LintImplementation
 
+
 # Internal types
+
 @docs Visitor, LintResult, File
+
 -}
 
 import Ast.Expression exposing (..)
@@ -38,6 +39,7 @@ a description of the error.
     error : LintError
     error =
         LintError "NoDebug" "Forbidden use of Debug"
+
 -}
 type alias LintError =
     { rule : String
@@ -63,31 +65,35 @@ enforce.
         { statementFn = doNothing
         , typeFn = doNothing
         , expressionFn = expressionFn
-        , moduleEndFn = (\ctx -> ( [], ctx ))
+        , moduleEndFn = \ctx -> ( [], ctx )
         , initialContext = Context
         }
+
 -}
 type alias LintImplementation nodeType context =
     context -> Direction nodeType -> ( List LintError, context )
 
 
 {-| When visiting the AST, nodes are visited twice:
-- on Enter, before the children of the node will be visited
-- on Exit, after the children of the node have been visited
+
+  - on Enter, before the children of the node will be visited
+
+  - on Exit, after the children of the node have been visited
 
     expressionFn : Context -> Direction Expression -> ( List LintError, Context )
     expressionFn ctx node =
-        case node of
-            Enter (Variable names) ->
-                ( [], markVariableAsUsed ctx names )
+    case node of
+    Enter (Variable names) ->
+    ( [], markVariableAsUsed ctx names )
 
-            -- Find variables declared in `let .. in ..` expression
-            Enter (Let declarations body) ->
-                ( [], registerVariables ctx declarations )
+              -- Find variables declared in `let .. in ..` expression
+              Enter (Let declarations body) ->
+                  ( [], registerVariables ctx declarations )
+
+              -- When exiting the `let .. in ..` expression, report the variables that were not used.
+              Exit (Let _ _) ->
+                  ( unusedVariables ctx |> List.map createError, ctx )
 
-            -- When exiting the `let .. in ..` expression, report the variables that were not used.
-            Exit (Let _ _) ->
-                ( unusedVariables ctx |> List.map createError, ctx )
 -}
 type Direction node
     = Enter node
@@ -95,25 +101,31 @@ type Direction node
 
 
 {-| A LintRuleImplementation is the implementation of a rule. It is a record that contains:
-- initialContext: An initial context
-- statementFn: A LintImplementation for Statement nodes
-- typeFn: A LintImplementation for Type nodes
-- expressionFn: A LintImplementation for Expression nodes
-- moduleEndFn: A function that takes a context and returns a list of error. Similar to a LintImplementation, but will
-be called after visiting the whole AST.
+
+  - initialContext: An initial context
+
+  - statementFn: A LintImplementation for Statement nodes
+
+  - typeFn: A LintImplementation for Type nodes
+
+  - expressionFn: A LintImplementation for Expression nodes
+
+  - moduleEndFn: A function that takes a context and returns a list of error. Similar to a LintImplementation, but will
+    be called after visiting the whole AST.
 
     rule : LintRule
     rule input =
-        lint input implementation
+    lint input implementation
 
     implementation : LintRuleImplementation Context
     implementation =
-        { statementFn = doNothing
-        , typeFn = doNothing
-        , expressionFn = expressionFn
-        , moduleEndFn = (\ctx -> ( [], ctx ))
-        , initialContext = Context
-        }
+    { statementFn = doNothing
+    , typeFn = doNothing
+    , expressionFn = expressionFn
+    , moduleEndFn = (\\ctx -> ( [], ctx ))
+    , initialContext = Context
+    }
+
 -}
 type alias LintRuleImplementation context =
     { statementFn : LintImplementation Statement context
@@ -140,6 +152,7 @@ type alias LintRule =
 A Visitor represents a node and calls the appropriate function for the given node type.
 
 Note: this is internal API, and will be removed in a future version.
+
 -}
 type alias Visitor context =
     LintRuleImplementation context -> context -> ( List LintError, context )
@@ -147,9 +160,10 @@ type alias Visitor context =
 
 {-| Severity associated to a rule.
 
-- Critical: Transgressions reported by the rule will make the linting process fail.
-- Warning: Transgressions reported by the rule will not make the linting process fail.
-- Disabled: Rule will not be enforced.
+  - Critical: Transgressions reported by the rule will make the linting process fail.
+  - Warning: Transgressions reported by the rule will not make the linting process fail.
+  - Disabled: Rule will not be enforced.
+
 -}
 type Severity
     = Disabled

src/Lint/Visitor.elm

@@ -1,8 +1,8 @@
-module Lint.Visitor exposing (transformStatementsIntoVisitors, expressionToVisitors)
+module Lint.Visitor exposing (expressionToVisitors, transformStatementsIntoVisitors)
 
 import Ast.Expression exposing (..)
 import Ast.Statement exposing (..)
-import Lint.Types exposing (LintRule, Direction(..), Visitor)
+import Lint.Types exposing (Direction(..), LintRule, Visitor)
 
 
 createExitAndEnterWithChildren : (Direction nodeType -> Visitor context) -> nodeType -> List (Visitor context) -> List (Visitor context)
@@ -92,7 +92,7 @@ expressionToVisitors node =
         childrenVisitors =
             List.concatMap expressionToVisitors children
     in
-        createExitAndEnterWithChildren expressionVisitor node childrenVisitors
+    createExitAndEnterWithChildren expressionVisitor node childrenVisitors
 
 
 typeToVisitors : Type -> List (Visitor context)
@@ -114,7 +114,7 @@ statementToVisitors node =
                 _ ->
                     []
     in
-        createExitAndEnterWithChildren statementVisitor node childrenVisitors
+    createExitAndEnterWithChildren statementVisitor node childrenVisitors
 
 
 transformStatementsIntoVisitors : List Statement -> List (Visitor context)