Add clang format file

.clang-format

+# .clang-format for Qt Creator
+#
+# This is for clang-format >= 5.0.
+#
+# The configuration below follows the Qt Creator Coding Rules [1] as closely as
+# possible. For documentation of the options, see [2].
+#
+# Use ../../tests/manual/clang-format-for-qtc/test.cpp for documenting problems
+# or testing changes.
+#
+# [1] https://doc-snapshots.qt.io/qtcreator-extending/coding-style.html
+# [2] https://clang.llvm.org/docs/ClangFormatStyleOptions.html
+#
 ---
 Language:        Cpp
 AccessModifierOffset: -4
 AlignAfterOpenBracket: Align
 AlignConsecutiveAssignments: false
 AlignConsecutiveDeclarations: false
-AlignEscapedNewlines: Right
-AlignOperands:   false
+AlignEscapedNewlines: DontAlign
+AlignOperands:   true
 AlignTrailingComments: true
 AllowAllParametersOfDeclarationOnNextLine: true
 AllowShortBlocksOnASingleLine: false
 AllowShortCaseLabelsOnASingleLine: false
-AllowShortFunctionsOnASingleLine: All
+AllowShortFunctionsOnASingleLine: Inline
 AllowShortIfStatementsOnASingleLine: false
 AllowShortLoopsOnASingleLine: false
-AlwaysBreakAfterDefinitionReturnType: None
 AlwaysBreakAfterReturnType: None
 AlwaysBreakBeforeMultilineStrings: false
-AlwaysBreakTemplateDeclarations: MultiLine
-BinPackArguments: true
-BinPackParameters: true
-BraceWrapping:   
-  AfterClass:      false
+AlwaysBreakTemplateDeclarations: true
+BinPackArguments: false
+BinPackParameters: false
+BraceWrapping:
+  AfterClass:      true
   AfterControlStatement: false
   AfterEnum:       false
-  AfterFunction:   false
+  AfterFunction:   true
   AfterNamespace:  false
   AfterObjCDeclaration: false
-  AfterStruct:     false
+  AfterStruct:     true
   AfterUnion:      false
-  AfterExternBlock: false
   BeforeCatch:     false
   BeforeElse:      false
   IndentBraces:    false
-  SplitEmptyFunction: true
-  SplitEmptyRecord: true
-  SplitEmptyNamespace: true
-BreakBeforeBinaryOperators: None
+  SplitEmptyFunction: false
+  SplitEmptyRecord: false
+  SplitEmptyNamespace: false
+BreakBeforeBinaryOperators: All
 BreakBeforeBraces: Custom
 BreakBeforeInheritanceComma: false
-BreakInheritanceList: BeforeColon
 BreakBeforeTernaryOperators: true
 BreakConstructorInitializersBeforeComma: false
-BreakConstructorInitializers: BeforeColon
+BreakConstructorInitializers: BeforeComma
 BreakAfterJavaFieldAnnotations: false
 BreakStringLiterals: true
-ColumnLimit:     80
+ColumnLimit:    100
 CommentPragmas:  '^ IWYU pragma:'
 CompactNamespaces: false
 ConstructorInitializerAllOnOneLineOrOnePerLine: false
@@ -55,63 +65,51 @@ DerivePointerAlignment: false
 DisableFormat:   false
 ExperimentalAutoDetectBinPacking: false
 FixNamespaceComments: true
-ForEachMacros:   
+ForEachMacros:
+  - forever # avoids { wrapped to next line
   - foreach
   - Q_FOREACH
   - BOOST_FOREACH
-IncludeBlocks:   Preserve
-IncludeCategories: 
-  - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
-    Priority:        2
-  - Regex:           '^(<|"(gtest|gmock|isl|json)/)'
-    Priority:        3
-  - Regex:           '.*'
-    Priority:        1
+IncludeCategories:
+  - Regex:           '^<Q.*'
+    Priority:        200
 IncludeIsMainRegex: '(Test)?$'
-IndentCaseLabels: true
-IndentPPDirectives: None
+IndentCaseLabels: false
 IndentWidth:     4
 IndentWrappedFunctionNames: false
 JavaScriptQuotes: Leave
 JavaScriptWrapImports: true
-KeepLineBreaksForNonEmptyLines: false
-KeepEmptyLinesAtTheStartOfBlocks: true
-MacroBlockBegin: ''
-MacroBlockEnd:   ''
+KeepEmptyLinesAtTheStartOfBlocks: false
+# Do not add QT_BEGIN_NAMESPACE/QT_END_NAMESPACE as this will indent lines in between.
+MacroBlockBegin: ""
+MacroBlockEnd:   ""
 MaxEmptyLinesToKeep: 1
 NamespaceIndentation: None
-ObjCBinPackProtocolList: Auto
-ObjCBlockIndentWidth: 2
+ObjCBlockIndentWidth: 4
 ObjCSpaceAfterProperty: false
 ObjCSpaceBeforeProtocolList: true
-PenaltyBreakAssignment: 2
-PenaltyBreakBeforeFirstCallParameter: 19
-PenaltyBreakComment: 300
-PenaltyBreakFirstLessLess: 120
-PenaltyBreakString: 1000
-PenaltyBreakTemplateDeclaration: 10
-PenaltyExcessCharacter: 1000000
-PenaltyReturnTypeOnItsOwnLine: 60
+PenaltyBreakAssignment: 500
+PenaltyBreakBeforeFirstCallParameter: 150
+PenaltyBreakComment: 500
+PenaltyBreakFirstLessLess: 400
+PenaltyBreakString: 600
+PenaltyExcessCharacter: 7
+PenaltyReturnTypeOnItsOwnLine: 300
 PointerAlignment: Right
-ReflowComments:  true
+ReflowComments:  false
 SortIncludes:    true
 SortUsingDeclarations: true
-SpaceAfterCStyleCast: false
-SpaceAfterTemplateKeyword: true
+SpaceAfterCStyleCast: true
+SpaceAfterTemplateKeyword: false
 SpaceBeforeAssignmentOperators: true
-SpaceBeforeCpp11BracedList: false
-SpaceBeforeCtorInitializerColon: true
-SpaceBeforeInheritanceColon: true
 SpaceBeforeParens: ControlStatements
-SpaceBeforeRangeBasedForLoopColon: true
 SpaceInEmptyParentheses: false
 SpacesBeforeTrailingComments: 1
 SpacesInAngles:  false
-SpacesInContainerLiterals: true
+SpacesInContainerLiterals: false
 SpacesInCStyleCastParentheses: false
 SpacesInParentheses: false
 SpacesInSquareBrackets: false
 Standard:        Cpp11
-TabWidth:        8
+TabWidth:        4
 UseTab:          Never
-...