运算符=(以clang格式

时间:2018-12-18 15:03:24

标签: c++ llvm operator-keyword clang-format

我正在C ++ Windows 10中使用LLVM 7.0.0中的clang格式。

我正在上课

class FooooooooooooooooooC
{
public:
   FooooooooooooooooooC() = default;
   const FooooooooooooooooooC& operator=( const FooooooooooooooooooC& ) = delete;

};

运行clang格式后,它应该看起来像这样

class FooooooooooooooooooC
{
public:
   FooooooooooooooooooC() = default;
   const FooooooooooooooooooC& operator=(
      const FooooooooooooooooooC& ) = delete;

};

但是实际上在运行clang格式后看起来像这样

class FooooooooooooooooooC
{
public:
   FooooooooooooooooooC() = default;
   const FooooooooooooooooooC& 
   operator=( const FooooooooooooooooooC& ) = delete;

};

我的.clang格式的clang-fromat设置为

---
AccessModifierOffset: -3
AlignAfterOpenBracket: AlwaysBreak
AlignConsecutiveAssignments: true
AlignConsecutiveDeclarations: false
AlignEscapedNewlines: Right
AlignOperands: true
AlignTrailingComments: true
AllowAllParametersOfDeclarationOnNextLine: false
AllowShortBlocksOnASingleLine: false
AllowShortCaseLabelsOnASingleLine: false
AllowShortFunctionsOnASingleLine: None
AllowShortIfStatementsOnASingleLine: false
AllowShortLoopsOnASingleLine: false
AlwaysBreakAfterDefinitionReturnType: None
AlwaysBreakAfterReturnType: None
AlwaysBreakBeforeMultilineStrings: false
AlwaysBreakTemplateDeclarations: true
BinPackArguments: false
BinPackParameters: false
BraceWrapping:   
  AfterClass:            true
  AfterControlStatement: true
  AfterEnum:             true
  AfterFunction:         true
  AfterNamespace:        true
  AfterObjCDeclaration:  true
  AfterStruct:           true
  AfterUnion:            true
  AfterExternBlock:      true
  BeforeCatch:           true
  BeforeElse:            true
  IndentBraces:          true
  SplitEmptyFunction:    true
  SplitEmptyRecord:      true
  SplitEmptyNamespace:   true
BreakAfterJavaFieldAnnotations: false
BreakBeforeBinaryOperators: None
BreakBeforeBraces: Custom
BreakBeforeTernaryOperators: true
BreakConstructorInitializers: BeforeComma
BreakInheritanceList: BeforeComma
BreakStringLiterals: true
CommentPragmas:  '^ IWYU pragma:'
ColumnLimit: 80
CompactNamespaces: false
ConstructorInitializerAllOnOneLineOrOnePerLine: false
ConstructorInitializerIndentWidth: 0
ContinuationIndentWidth: 3
Cpp11BracedListStyle: true
DerivePointerAlignment: false
DisableFormat: false
ExperimentalAutoDetectBinPacking: false
FixNamespaceComments: true
ForEachMacros:
  - foreach
  - Q_FOREACH
  - BOOST_FOREACH
IncludeBlocks: Regroup
IncludeCategories: 
  - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
    Priority:        2
  - Regex:           '^(<|"(gtest|gmock|isl|json)/)'
    Priority:        3
  - Regex:           '.*'
    Priority:        1
IncludeIsMainRegex: '(Test)?$'
IndentCaseLabels: true
IndentPPDirectives: None
IndentWidth: 3
IndentWrappedFunctionNames: false
JavaScriptQuotes: Leave
JavaScriptWrapImports: true
KeepEmptyLinesAtTheStartOfBlocks: false
Language: Cpp
MacroBlockBegin: ''
MacroBlockEnd: ''
MaxEmptyLinesToKeep: 1
NamespaceIndentation: None
PenaltyBreakAssignment: 2
PenaltyBreakBeforeFirstCallParameter: 19
PenaltyBreakComment: 300
PenaltyBreakFirstLessLess: 120
PenaltyBreakString: 1000
PenaltyBreakTemplateDeclaration: 1000000
PenaltyExcessCharacter: 1000000
PenaltyReturnTypeOnItsOwnLine: 60
PointerAlignment: Left
ReflowComments: true
SortIncludes: true
SortUsingDeclarations: true
SpaceAfterCStyleCast: false
SpaceAfterTemplateKeyword: false
SpaceBeforeAssignmentOperators: true
SpaceBeforeCpp11BracedList: true
SpaceBeforeCtorInitializerColon: true
SpaceBeforeInheritanceColon: true
SpaceBeforeParens: ControlStatements
SpaceBeforeRangeBasedForLoopColon: true
SpaceInEmptyParentheses: false
SpacesBeforeTrailingComments: 1
SpacesInAngles: false
SpacesInCStyleCastParentheses: false
SpacesInContainerLiterals: true
SpacesInParentheses: true
SpacesInSquareBrackets: true
Standard: Cpp11
TabWidth: 3
UseTab: Never
...

有人知道如何配置clang-fromat以在

之后创建一个中断
  

operator =(

谢谢!

1 个答案:

答案 0 :(得分:0)

总而言之,您做得还不够。

这里是如何将clang格式配置为在const FooooooooooooooooooC&之后暂停

在决定如何分行时,clang-format使用几个加权因子,其名称都以Penalty开头。在这种情况下,您希望返回类型与函数名称保持在同一行,因此您要调整PenaltyReturnTypeOnItsOwnLine。 .clang格式的值为60。而是使用:

PenaltyReturnTypeOnItsOwnLine: 200

使其值为110或更大,以防止在返回const FooooooooooooooooooC&后断线。我建议200匹配Chromium,Google和Mozilla的预定义的clang格式样式。 (此外,我不知道为什么110是阈值;惩罚值相当不透明,我只是通过实验发现了该值。)

但是,最终结果是:

   const FooooooooooooooooooC& operator=( const FooooooooooooooooooC& ) =
      delete;

我不认为有任何方法可以在operator=(之后强制中断。如果您的班级名称是 long 个4个字符,那么您会得到所需的内容,因为delete之前的上述拆分将超过80个字符。


  • 以上评论提到ColumnLimit。即使允许增加列限制,也只能将operator=声明保留在一行上。不允许您强迫它在operator=(之后分割行。

  • 以上评论提到AllowAllParametersOfDeclarationOnNextLine: false。如您所知,这不能解决问题。当有多个参数时,这会影响是否将所有参数放在单独的行上的决定。但是您只有一个参数。 (请参见documentation。)


最后,请注意,与您的7.0.0相比,我使用的是clang格式6.0.0。但是,在clang格式中似乎没有任何区别,在这里会有所不同:

  • ReleaseNotes.html没有提及任何重要内容
  • 在7.0.0和6.0.0中有几个新的clang格式样式选项(我注意到,因为clang格式6.0.0在您的.clang格式文件中抱怨它们),但是没有与此相关的选项问题。