CLion 2016.2 Help

Code Style. C/C++

File | Settings | Editor | Code Style | C/C++ for Windows and Linux

CLion | Preferences | Editor | Code Style | C/C++ for OS X


Use this page to configure formatting options for C/C++ files. View the result in the Preview pane on the right.

On this page:

Set from

Click this link to choose the base for the current language default code style from the pop-up list, that appears. The list contains the following options:

ItemDescription
Language Choose this option to inherit the code style settings from another language. Select the source language from the list, that opens. So doing, only the settings that are applicable to the current language are taken. All the other settings are not affected.
Predefined Style Choose this option to use one of the well-known code style guidelines. Select one of the following standards from the list.

Note: each code style affects only the certain items of base settings and leaves the rest unchanged.

The following styles are applicable for braces placement only:

Tabs and Indents

ItemDescription
Use tab character
  • If this check box is selected, tab characters are used:
    • On pressing the Tab key
    • For indentation
    • For code reformatting
  • When the check box is cleared, CLion uses spaces instead of tabs.
Smart tabs
  • If this check box is selected, CLion inserts tabs for indentation and reformatting. CLion inserts tabs in the beginning of each line until a symbol other than the tab is inserted. After that when you press the tab key, CLion will enter spaces.
  • If this check box is cleared, only tabs are used. This means that a group of spaces that fits the specified tab size is automatically replaced with a tab, which may result in breaking fine alignment.

The Smart Tabs check box is available if the Use Tab Character check box is selected.

Tab sizeIn this text box, specify the number of spaces included in a tab.
Continuation indentIn this text box, specify the number of spaces (or tabs if the Use Tab Character check box is selected) to be inserted between the elements of an array, in expressions, method declarations and method calls.
Keep indents on empty linesIf this check box is cleared, then CLion will keep indents on the empty lines as if they have contained some code.
If this check box is not selected, CLion will delete the tabulation characters.
Indent in lambdasIn this field, type the indent of lambda expressions.
Indent members of plain structuresIn this field, type the indent of the plain structure members.
Indent members of classesIn this field, type the indent of the class members.
Indent visibility keywords in class/structure

In this field, type the indent of the visibility keywords (public, protected, etc).

Indent members of namespaceIn this field, type the indent of members of namespaces.
Preprocessor directive indentIn this field type the indent of preprocessor directives.
Follow code indentSelect this check-box to keep the indent of preprocessor directives equal to that of surrounding code lines.

Spaces

Use this tab to specify where you want spaces in your code. To have CLion automatically insert a space at a location, select the check box next to this location in the list. The results are displayed in the Preview pane.

Wrapping and braces

In this tab, customize the code style options, which CLion will apply on reformatting the source code. The left-hand pane contains the list of exceptions (Keep when reformatting), and placement and alignment options for the various code constructs (lists, statements, operations, annotations, etc.). The right-hand pane shows preview.

Alignment takes precedence over indentation options.

Right Margin (columns)

Use Right Margin field to specify a margin space required on the right side of an element. If you select Default option then a value of the right margin from the global settings is used.

Wrap on typing

Use Wrap on typing settings to specify how the edited text is fitted in the specified Right margin. You can select one the following options:

  • Default - in this case CLion uses the Wrap on typing option that is specified in the global settings.
  • Yes - in this case CLion uses the value specified in the Right Margin field.
  • No - in this case this option is switched off and a line can exceed the value specified in the right margin.

Keep when reformatting

Use the check boxes to configure exceptions that CLion will make when reformatting the source code. For example, by default, the Line breaks check box is selected. If your code contains lines that are shorter than a standard convention, you can convert them by disabling the Line breaks check box before you reformat the source code.

Alignment options

ItemDescription
Align when multiline If this check box is selected, a code construct starts at the same column on each next line. Otherwise, the position of a code construct is determined by the current indentation level.
Align parenthesised when multiline If this check box is selected, a parenthesised code construct starts at the column of the opening parenthesis each next line. Otherwise, the position of a code construct is determined by the current indentation level.
'else' on new lineUse this check box to have the corresponding statements or characters moved to the next line.
Special else if treatmentIf this check box is selected, else if statements are located in the same line.

Otherwise, else if statements are moved to the next line to the corresponding indent level.

Indent case branches If this check box is selected, the case statement is located at the corresponding indent level. Otherwise, case statement is placed at the same indent level with switch.

Braces placement options

ItemDescription
Braces placement style Use this drop-down list to specify the position of the opening brace in class declarations, function declarations and other types of declarations. The available options are:
  • End of line - select this option to have the opening brace placed at the declaration line end.
  • Next line if wrapped - select this option to have the opening brace placed at the beginning of the line after the multiline declaration line.
  • Next line - select this option to have the opening brace placed at the beginning of the line after the declaration line.
  • Next line shifted - select this option to have the opening brace placed at the line after the declaration line being shifted to the corresponding indent level.
  • Next line each shifted - select this option to have the opening brace placed at the line after the declaration line being shifted to the corresponding indent level, and have the next line shifted to the next indent level as well.

Blank lines

Use this tab to define where and how many blank lines you want CLion to retain and insert in your code after reformatting. For each type of location, specify the number of blank lines to be inserted. The results are displayed in the Preview pane.

ItemDescription
Keep Maximum Blank LinesIn this area, specify the number of blank lines to be kept after reformatting in the specified locations.
Minimum Blank LinesIn the text boxes in this area, specify the number of blank lines to be present in the specified locations.

Code Generation tab

ItemDescription
General
  • Line comment at first column: If this check box is selected, line comments will be aligned at the first column; otherwise, they will be aligned at the code.
  • Block comment at first column: If this check box is selected, block comments will be aligned at the first column; otherwise, they will be aligned at the code.
  • Indent new lines in block comments: If this check box is selected, each next line of the block code will be indented; otherwise, it will be aligned with the first line of the block.
  • Const/volatile qualifier placement. The setting defines the keywords order during the code generation.

    Select the const int x = 0 radio button to place the const/volatile qualifier before a type specifier.
    Select the int const x = 0 radio button to place the const/volatile qualifier between the type specifier and the symbol name.

C++
  • Prefix for fields: type a prefix that will prepend a name of an automatically generated field.
  • Suffix for fields: type a suffix that will be appended to a name of an automatically generated field.
  • Prefix for getters: type a prefix that will prepend a name of an automatically generated getter. The default name is get.
  • Prefix for setters: type a prefix that will prepend a name of an automatically generated setter. The default name is set.
  • Generate != together with ==: select this check box to enable this setting as default for Select Fields dialog when generating an equality operator.
  • Generate >,<=,>= together with <: select this check box to enable this setting as default for Select Fields dialog when generation a relational operator.
Documentation comments
  • Add @brief tag: select this check box to enable the @brief tag in Doxygen style comments.
  • Tag prefix in line comments: click @param or \param radio button to select the preferred prefix type.
  • Tag prefix in block comments: click @param or \param radio button to select the preferred prefix type.

New File Extensions Tab

In this tab you can define the source/header file types used in the Create New C/C++ Source File dialog. This tab also determines the order of their appearance in the Type field of that dialog: the first pair in the tab is the first extension in the type list in dialog.
ItemDescription
Source/header file types pane. The list of source and header file types. All the code style rules specified under this node of Settings, are applicable to the listed file types.
Source ExtensionFrom the drop-down list, choose the extension to be associated with the source files.
Header Extension From the drop-down list, choose the extension to be associated with the header files.
ItemShortcutDescription
add Alt+Insert Click this button to add a new source/header file types pair to the list. The new pair is always of .cpp/.h type. When added to the list, assign the desired extensions from the Source Extension/Header Extension dropdown lists to them.
delete Alt+Delete Click this button to remove the selected source/header file types pair from the list.
arrowUparrowDown Alt+Up or Alt+Down Use these buttons to move the selected source/header file types pair up and down in the list.
Last modified: 29 July 2016