Add .clang-format file

Author: franzpoeschel

.clang-format

@@ -0,0 +1,66 @@
+Language:  Cpp
+
+BasedOnStyle:  LLVM
+AccessModifierOffset: -4
+AlignAfterOpenBracket: AlwaysBreak
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+# AlignEscapedNewlinesLeft: false
+AlignEscapedNewlines: Right
+AlignOperands: false
+AlignTrailingComments: false
+AllowAllArgumentsOnNextLine: true
+AllowAllConstructorInitializersOnNextLine: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: false
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: None
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLambdasOnASingleLine: true
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakBeforeMultilineStrings: true
+AlwaysBreakTemplateDeclarations:  MultiLine
+BinPackArguments: false
+BinPackParameters: false
+
+BreakBeforeBraces:  Custom
+BraceWrapping:
+  AfterClass: true
+  AfterControlStatement: true
+  AfterEnum: true
+  AfterExternBlock: true
+  AfterFunction: true
+  AfterNamespace: true
+  AfterStruct: true
+  AfterUnion: true
+  BeforeCatch: true
+  BeforeElse: true
+  # BeforeLambdaBody: true
+  SplitEmptyFunction: false
+  SplitEmptyNamespace: false
+  SplitEmptyRecord: false
+
+BreakConstructorInitializers: BeforeComma
+BreakInheritanceList: BeforeComma
+ColumnLimit: 80
+CompactNamespaces: false
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerIndentWidth:  4
+ContinuationIndentWidth: 4
+FixNamespaceComments: true
+IndentWidth: 4
+NamespaceIndentation: Inner
+PointerAlignment: Right
+SortUsingDeclarations: false
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesInAngles: false
+SpacesInContainerLiterals: false
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard: Auto
+StatementMacros: ["OPENPMD_private", "OPENPMD_protected"]