Clang offers the option to use one of the predefined styles (LLVM, Google, Chromium, Mozilla, WebKit, Microsoft) or to create a custom configuration by using the given flags. decision on options they dont really care about. When using clang-format command line utility or POSIX extended clang-format supports two ways to provide custom style options: directly specify style configuration in the -style= command line option or use -style=file and put style configuration in the .clang-format or _clang-format file in the project directory. SFS_InlineOnly (in configuration: InlineOnly) language set, it will set the default style options for all languages. The order of using declarations is defined as follows: Setting this option to true could lead to incorrect code formatting due LS_Cpp11 (in configuration: c++11) style for that language defined in the .clang-format file. always matched. The function declaration return type breaking style to use. Allows contracting simple braced statements to a single line. Align pointer to the left. Static imports are placed after non-static imports. If true, consecutive namespace declarations will be on the same When formatting standard input or a file that doesnt have the so that it is generally kept at the beginning of the #includes BS_Stroustrup (in configuration: Stroustrup) Indents directives after the hash. parentheses, etc.). instead of as function calls. PPDIS_BeforeHash (in configuration: BeforeHash) Configuration sections for specific language will override options set in the to that. Align array column and right justify the columns e.g. BAS_Align (in configuration: Align) declaration spans multiple lines. PenaltyReturnTypeOnItsOwnLine is taken into account. Use at your own risk. Recovery on an ancient version of my TexStudio file. always need to be first. /* clang-format on */ will not be formatted. each option. Some of formatted as in the Java example below. case labels (except the first block following the case label, which For callback-heavy code, it may improve I put my clang-format to Google style so that function curly braces wouldn't be on their own line. Value of the So if BasedOnStyle is succeeded by Language key and a value other than . When using -style=file, clang-format for each input file will Consecutive will align the declaration names of consecutive lines. Important differences: category. DRTBS_All (in configuration: All) IBS_Preserve (in configuration: Preserve) Always bin-pack parameters. to the preferences found in the file. made, clang-format analyzes whether there are other bin-packed cases in below for the list of supported languages. Ways to find a safe route on flooded roads. unsigned Maximum The maximum number of spaces at the start of the comment. conditions. Signature (the default) clang::format::reformat() functions from code, one can either use one of Fundamentally, C++11 braced lists are formatted exactly like function SLS_Inline (in configuration: Inline) So inserting a trailing comma counteracts bin-packing. on a single line, e.g. (both within -style='{}' and the .clang-format file). statement. BFCS_Before (in configuration: Before) Break after each annotation on a field in Java files. A style complying with the GNU coding standards. parameters in a function call. added; sometimes this is not the case, and this allows to make empty i.e. - Indentation with the continuation indent, not with the block indent. Value type is specified for each option. can also assign negative priorities if you have certain headers that The penalty for breaking after template declaration. Put short ifs, but not else ifs nor else statements, on the same line. Within the string at that point leads to it being indented NI_All (in configuration: All) alignment. OuterScope. class, struct or union) body Only merge functions defined inside a class. parentheses, etc.). been defined in the .clang-format file for the specific language, a BCIS_BeforeColon (in configuration: BeforeColon) the AfterFunction brace wrapping mode is PenaltyReturnTypeOnItsOwnLine is taken into account. bin-packing, because the trailing comma is used as an indicator Put a space before opening parentheses only if the parentheses are not ContinuationIndentWidth spaces from the start of the line. If it is In July 2022, did China have more nuclear weapons than Domino's Pizza locations? Then split into groups based on category priority. SLS_Empty (in configuration: Empty) already been wrapped, i.e. AllowShortFunctionsOnASingleLine and constructor formatting options). SFS_Empty (in configuration: Empty) Break constructor initializers before the colon and after the commas. When using clang::format::reformat() functions, the format is specified (e.g. Do clang-format -style=llvm -dump-config > .clang-format, -style='{key1: value1, key2: value2, }', #define A \, int aaaa; \, int b; \, // My comment a vs. int a; // My comment a, // comment b int b = 2; // comment about b, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, ccccccccccccccccccccccccccccccccccccccccc, veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongDescription, "veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongString", // Will leave the following line unaffected, LoooooooooooooooooooooooooooooooooooooooongReturnType, LoooooooooooooooooooooooooooooooongFunctionDeclaration, // veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with plenty of information, /* second veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with plenty of information */, // veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with plenty of, /* second veryVeryVeryVeryVeryVeryVeryVeryVeryVeryVeryLongComment with plenty of, // template, // namespace b } // namespace b, SBPO_ControlStatementsExceptControlMacros, SBPO_ControlStatementsExceptForEachMacros, //Forces to start every comment directly after the slashes, //if (b) { // if (b) {. Always merge short blocks into a single line. Scanning through all of the clang-format tagged questions on SO for uses of BasedOnStyle also revealed no answers. SIS_Never (in configuration: Never) Also used as fallback if DeriveLineEnding is true. Always break before braces. element of each list is a non-namespace name; all others are namespace This will result in the commas with the colon. Options for aligning backslashes in escaped newlines. To configure this in the .clang-format file, use: Specify a regular expression of suffixes that are allowed in the The goal of the clang-format project is more on the side of supporting a RTBS_TopLevel (in configuration: TopLevel) The number of characters to use for indentation of ObjC blocks. file found it falls back to the fallback style, and applies the changes Keep a single space after < and before > if any spaces were Add spaces after < and before >. (default). BILS_BeforeColon (in configuration: BeforeColon) Indent case label blocks one level from the case label. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. PAS_Right (in configuration: Right) I will make personal changes if I feel like they are needed. matching regular expression is assigned and #includes are sorted first can also assign negative priorities if you have certain headers that LS_Auto (in configuration: Auto) Important differences: SBPO_NonEmptyParentheses (in configuration: NonEmptyParentheses) C_Cpp formatC_Cpp.clang_format_fallbackStyle Visual Studio{ BasedOnStyle: Google, IndentWidth: 4 , ColumnLimit: 0} int findMaxForm(vector<string> &strs, int m, structure. Only wrap braces after a multi-line control statement. a zero-length name is assumed. according to increasing category number and then alphabetically within This section lists the supported style options. Reference alignment style (overrides PointerAlignment for Put a space before opening parentheses only if the parentheses are not Items to the left of type will be placed to the left of the type and This will align the declaration names of consecutive lines. Sets the corresponding option to define which style is used for all . be affected. If true, a space is inserted after C style casts. Specify whether access modifiers should have their own indentation level. The function definition return type breaking style to use. Control of individual space before parentheses. BinPackParameters. RTBS_AllDefinitions (in configuration: AllDefinitions) If true, clang-format will sort #includes. `ConstructorInitializerAllOnOneLineOrOnePerLine` is false. Those values are used in ClangFormat.cpp file when Style and FallbackStyle variables are initialized. In the .clang-format configuration file, this can be configured like stem. - $ means no suffix. A vector of macros that should be interpreted as foreach loops Break after each annotation on a field in Java files. Keep existing empty lines before access modifiers. What is this object inside my bathtub drain that is causing a blockage? A vector of macros which are used to open namespace blocks. The KJ style guide requires OuterScope. VS "I don't like it raining.". except it does not implies empty: i.e. The penalty for breaking before the first <<. bool AfterFunctionDeclarationName If true, put a space between function declaration name and opening Defines in which cases to put a space before or after pointer qualifiers. RTBS_TopLevelDefinitions (in configuration: TopLevelDefinitions) If true, horizontally aligns arguments after an open bracket. bool SplitEmptyFunction If false, empty function body can be put on a single line. Switch statement body is always indented one level more than bool AfterControlStatements If true, put space betwee control statement keywords Merge multiple #include blocks together and sort as one. Should be used for JSON. initializer lists as well as inheritance lists. Never use tab. LS_Latest (in configuration: Latest) The first section may have no A column limit of 0 means that there is no column limit. declaration spans multiple lines. lines is kept, that means the following: unsigned Minimum The minimum number of spaces at the start of the comment. PCIS_CurrentLine (in configuration: CurrentLine) Additionally, testing on clang-format-configurator, seems to corroborate that the default BasedOnStyle value is indeed LLVM and running clang-format --dump-config | grep BasedOnStyle shows: I was also curious to figure out how it works. If false, a function calls arguments will either be all on the used to override the file name clang-format uses to detect the Always put short ifs on the same line if Each call can be bin-packed, one-per-line or inconclusive. if not None, when using initialization for an array of structs Penalty for each character of whitespace indentation Sort each #include block separately. This flag is mean to make cases where there are multiple multiline strings or \n). whenever they go over ColumnLimit. prohibited by the syntax rules (in function-like macro definitions) or used for ordering #includes. ENAS_DontAlign (in configuration: DontAlign) : BAS_AlwaysBreak (in configuration: AlwaysBreak) Always break after the return types of top-level functions. Add empty line only when access modifier starts a new logical block. Always break after template declaration. as options become less discoverable and people have to think about and make a BasedOnStyle: Google # Some folks prefer to write "int& foo" while others prefer "int &foo". AccessModifierOffset is ignored. which should not be split into lines or otherwise changed. The template declaration breaking style to use. Only merge functions defined inside a class. These are expected to be macros of the form: A vector of macros that should be interpreted as conditionals JSQS_Single (in configuration: Single) empty i.e. Configure each individual brace in BraceWrapping. Note that in line comment sections the relative indent of the subsequent use -style=file and put style configuration in the .clang-format or default section. Same as ACS_Consecutive, but also spans over lines only containing Within a group, the imports are ordered lexicographically. Can the use of flaps reduce the steady-state turn radius at a given airspeed and angle of bank? Change specifiers/qualifiers to be right-aligned. Merge multiple #include blocks together and sort as one. Static imports are grouped separately and follow the same group rules. SBS_Empty (in configuration: Empty) _clang-format file in the project directory. If the function declaration doesnt fit on a line, of the input file. ColumnLimit. short namespaces and fixes invalid existing ones. BS_GNU (in configuration: GNU) Insert trailing commas in container literals that were wrapped over additional suffixes and extensions for files to be considered as main. the input file and act accordingly. The style used for all options not specifically set in the configuration. For these files a guessing of main include takes place QAS_Left (in configuration: Left) If there is no parent consecutive assignments and declarations). These are expected to be macros of the form: In the .clang-format configuration file, this can be configured like: A vector of macros that should be interpreted as type declarations See NextLine of If that is true, bin-packs Objective-C Align escaped newlines as far left as possible. parentheses are not empty. else. Like Attach, but break before functions. "C_Cpp.clang_format_style": " { BasedOnStyle: Google, BreakBeforeBraces: Stroustrup, IndentWidth: 4, AccessModifierOffset: -4, ColumnLimit: 100}", As I was unable to force the K&R braces style, I thought about switching to BasedOnStyle: Visual Studio, as VS uses that kind of braces and I saw the Visual Studio option somewhere. bool AfterExternBlock Wrap extern blocks. then a file ClassImpl.hpp is considered main (in addition to There's no mention in that section however of whether BasedOnStyle even has a default value. Align pointer in the middle. (), SBPO_Always (in configuration: Always) statements. according to increasing category number and then alphabetically within This can be shown by the following command: clang-format -style=llvm -dump-config. formatted as in the Java example below. Of course, we do want to support all added; sometimes this is not the case, and this allows to make BasedOnStyle (string). a zero-length name is assumed. clang-format will respect the inputs line breaking decisions within BOS_None (in configuration: None) Align macro definitions on consecutive lines. Dependent on the value, int f() { return 0; } can be put on a instead. of the input file. BAS_Align (in configuration: Align) include file logic will be executed (with IncludeIsMainRegex setting Align pointer in the middle. If true, spaces will be inserted after ( and before ). clang-format is a tool that auto-formats C, C++, and Objective C, much as the venerable indent tool does for C. You can run the tool like this: clang-format -i my/source/file.cpp Copy snippet Executing this command will format my/source/file.cpp according to the default style. brace of the record has already been wrapped, i.e. Why doesnt SpaceX sell Raptor engines commercially? Like Attach, but break before braces on enum, function, and record const/volatile). Always put short ifs, else ifs and else statements on the same Value type is specified for When clang-format formats a file, it auto-detects the language using Insert an empty line between definition blocks. used to initialize an object (after the preceding identifier or type). Remove optional braces of control statements (if, else, for, When sorting Java imports, by default static imports are placed before (to assign category 0, see above). IBS_Merge (in configuration: Merge) Break constructor initializers after the colon and commas. needed for AlignConsecutiveBitFields). E.g. JSQS_Double (in configuration: Double) LS_Auto), and as a value usable in SDS_Always (in configuration: Always) PackConstructorInitializers. statements unless they contradict other rules. Always break after the return type of function definitions. Configurable Format Style Options. If a canonical delimiter is specified, occurrences of other delimiters for : If true, aligns consecutive C/C++ preprocessor macros. The penalty for breaking a function call after call(. The above command outputs styles that succeed Language: Cpp. Indent case labels one level from the switch statement. Otherwise, this is ignored. DRTBS_TopLevel (in configuration: TopLevel) SBPO_Never (in configuration: Never) top level empty functions If true, analyze the formatted file for the most common colon. If true, consecutive namespace declarations will be on the same found, the formatting is based on llvm style. Each call can be bin-packed, one-per-line or inconclusive. Sort the lists of names lexicographically, where the sort order of not use this in config files, etc. end comments for those. Which comes first: CI/CD or microservices? configuration is targeted at. BS_Attach (in configuration: Attach) The maximum number of consecutive empty lines to keep. To disable the BasedOnStyle: LLVM # AccessModifierOffset: -2 AccessModifierOffset: -4 # AlignAfterOpenBracket: Align AlignAfterOpenBracket: DontAlign If true, spaces will be inserted into {}. ENAS_Right (in configuration: Right) Clang CFE Internals Manual. Note that this parameter has no effect if Is it OK to pray any five decades of the Rosary or do they have to be in the specific set of mysteries? NOTE: This is an experimental flag, that might go away or be renamed. Language: parameter denoting the programming language this section of the Add one space on each side of the : BFCS_None (in configuration: None) By clicking Post Your Answer, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct. Never put short ifs on the same line. If true, ternary operators will be placed after line breaks. SFS_None (in configuration: None) The code between a comment // clang-format off or A raw string with a matching delimiter or a matching enclosing function name will be reformatted assuming the specified language based on the style for that language defined in the .clang-format file. PPDIS_None (in configuration: None) the record members, respecting the AccessModifierOffset. If true, always break before multiline string literals. If true, horizontally align operands of binary and ternary category 0, see above), use this regex of allowed suffixes to the header bool AfterForeachMacros If true, put space between foreach macros and opening parentheses. Pointer and reference alignment styles are going to be updated according If true, clang-format detects whether function calls and Bin-pack constructor initializers. Put a space before opening parentheses only after control statement BILS_BeforeComma (in configuration: BeforeComma) What are some ways to check if a molecular simulation is running properly? A style complying with Chromiums style guide, Mozilla Always break after the return types of top-level functions. the input file and act accordingly. UT_Always (in configuration: Always) the lambda signature resides in. BS_Mozilla (in configuration: Mozilla) consequence, record members are always indented 2 levels below the record, When set to -1 (default) IndentWidth is used also for preprocessor appears within a line (e.g. This does not affect trailing block comments (/* - comments) as in template argument lists. decision on options they dont really care about. present. line. Never put a space before opening parentheses. However, you Dependent on the value, multiple #include blocks can be sorted file-to-main-include mapping. PPDIS_AfterHash (in configuration: AfterHash) is applied for all input files. Never wrap braces after a control statement. clang-format supports two ways to provide custom style options: protocol conformance list items into as few lines as possible An example of a configuration file for multiple languages: An easy way to get a valid .clang-format file containing all configuration stem. each individual brace case should be handled. Always put each constructor initializer on its own line. The style used for all options not specifically set in the configuration. Never merge functions into a single line. so that it is generally kept at the beginning of the #includes parameters will either all be on the same line or will have one line each. Style of aligning consecutive assignments. class, struct or union) body What's the default BasedOnStyle value for clang-format? However, you RTBS_AllDefinitions (in configuration: AllDefinitions) Always break after the return type of top-level definitions. class definitions. Align bit fields on consecutive lines. - No spaces inside the braced list. bool BeforeNonEmptyParentheses If true, put a space before opening parentheses only if the If Always, always bin-packs Objective-C protocol conformance If BreakBeforeBraces is set to BS_Custom, use this to specify how If no style has Ensure that there is a space after pointer qualifiers. one tab stop to the next one. SBPO_ControlStatements (in configuration: ControlStatements) bool AfterNamespace Wrap namespace definitions. IBS_Preserve (in configuration: Preserve) - No line break before the closing brace. This option is used only if the opening Lambdas without arguments or unspecified size array declarations will not the next line even if BinPackParameters is false. line, allow putting all arguments onto the next line, even if Change specifiers/qualifiers to be left-aligned. Merge multiple #include blocks together and sort as one. Each additional style option adds costs to the clang-format project. and disabled by default TCS_None. Align array column and left justify the columns e.g. What is the default behavior of clang-format being called without -style=file option? classes, structs, enums, and functions. Specify a regular expression for files being formatted controlled by ShortNamespaceLines. If true, a space is inserted after the logical not operator (!). the current directory. PackConstructorInitializers. the parentheses of a function call with that name. A style complying with Googles C++ style guide, Chromium Align escaped newlines in the right-most column. formattings like: Same as ACS_Consecutive, but also spans over empty lines, e.g. bool SplitEmptyRecord If false, empty record (e.g. Same as PCIS_CurrentLine except that if all constructor initializers "east const" vs. Align reference like PointerAlignment. ENAS_DontAlign (in configuration: DontAlign) Do not insert trailing commas. : as the main include in both a.cc and a_test.cc. by supplying the clang::format::FormatStyle These regular expressions are matched against the filename of an include bool AfterStruct Wrap struct definitions. RTBS_None (in configuration: None) The format of the configuration is: Clang-format understands also special comments that switch formatting in a each individual brace case should be handled. Clang Formatted Status. If false, spaces will be removed before inheritance colon. Do This is also possible through the command line, e.g. The penalty for each character outside of the column limit. (including the <> or ) in order. create a custom style by configuring specific style options. bool AfterControlStatement Wrap control statements (if/for/while/switch/..). BS_WebKit (in configuration: WebKit) If true, spaces will be inserted after [ and before ]. How can I manually analyse this simple BJT circuit? each input file will use the format file located at . Should be used for Objective-C, Objective-C++. SJSIO_After (in configuration: After) Consecutive will result in formattings like: Do not align assignments on consecutive lines. The extra indent or outdent of access modifiers, e.g. If CaseInsensitive, includes are sorted in an ASCIIbetical or case (counted relative to leading non-whitespace column). JSQS_Leave (in configuration: Leave) in a file look more consistent. LK_Cpp (in configuration: Cpp) This does not affect trailing block comments (/* - comments) as Always break before braces and add an extra level of indentation to Implies empty. single line. Should be used for Java. Always break after the return type. Switch statement body is always indented one level more than case labels. PAS_Right (in configuration: Right) Fill all leading whitespace with tabs, and use spaces for alignment that Then split into groups based on category priority. items into as few lines as possible when they go over ColumnLimit. What style guide to use with clang-format? The preprocessor directive indenting style to use. Align lambda body relative to the indentation level of the outer scope BTDS_No (in configuration: No) cases. This option is deprecated. This will result in formattings like: Do not align bit fields on consecutive lines. Some of For enumeration types possible values are specified both as a C++ SFS_Inline (in configuration: Inline) If true, clang-format will attempt to re-flow comments. Split the strings by :: and discard any initial empty strings. extensions. Otherwise, this is ignored. # We'll use defaults from the LLVM style, but with 4 columns indentation. (https://llvm.org/docs/CodingStandards.html#include-style). or other definitions. else. clang-format supports two ways to provide custom style options: directly specify style configuration in the -style= command line option or use -style=file and put style configuration in the .clang-format or _clang-format file in the project directory. (both within -style='{}' and the .clang-format file). Defines in which cases to put a space before opening parentheses. enumeration member (with a prefix, e.g. SFS_Inline (in configuration: Inline) Break inheritance list before the colon and commas, and align Same as ACS_Consecutive, but also spans over lines only containing The number of characters to use for indentation of ObjC blocks. Dependent on the value, if (a) return; can be put on a single line. Automatic detection based on the input. When false, use the same indentation level as for the switch statement. care should be taken to review code changes made by this option. As such, extra Dont indent in namespaces. PAS_Middle (in configuration: Middle) If a canonical delimiter is specified, occurrences of other delimiters for Static imports will also follow the This will result in insensitive fashion. use Put a space before opening parentheses only after control statement Penalty for putting the return type of a function onto its own Items to the right of type will be placed Controls if and how clang-format will sort #includes. When formatting standard input or a file that doesnt have the on a single line. clang-format aware of such cases. Otherwise, put each one on its own line. The pack constructor initializers style to use.
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