CLion Help

Code Style. C/C++

File | Settings | Editor | Code Style | C/C++


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

On this page:

Tabs and indents

Item Description
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, but fine alignment to a necessary column is done only via spaces without replacing them with tabs. This is done in order to preserve visual representation of the source code, when the Tab Size is changed.
  • 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 size In this text box, specify the number of spaces included in a tab.
Indent In this text box, specify the number of spaces (or tabs if the Use Tab Character check box is selected) to be inserted for each indent level.
Keep indents on empty lines If this check box is selected, 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.
Label indent In this text box, specify the number of spaces (or tabs if the Use Tab Character check box is selected) to be inserted at the next line before a label statement.
Absolute label indent If this check box is selected, label indentation is counted as an absolute number of spaces. Otherwise, label indentation is counted relative to previous indent levels.
Do not indent top level class members Select this check box to have top level class members located at the class declaration indentation level.
Use indents relative to expression start Use this check box to switch between the two possible indentation behaviors:
  • If this check box is not selected, the blocks of code will be formatted against the closest ancestor block that starts on a new line.
  • If this check box is selected, the blocks of code will be formatted in columns.
Indent in lambdas In this field, type the indent of lambda expressions. Observe results in the preview pane.
Indent visibility keywords in class/structure In this field, type the indent of the visibility keywords. Observe results in the preview pane.
Indent members of namespace In this field, type the indent of members of namespaces. Observe results in the preview pane.

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.

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 brakes check box is selected. If your code contains lines that are shorter than a standard convention, you can convert them by disabling the Line brakes check box before you reformat the source code.

Wrapping Options

The wrapping style applies to the various code constructs, specified in the left-hand pane (for example, method call arguments, or assignment statements).

Item Description
Wrapping style From this drop-down list, select the desired wrapping style:
  • Do not wrap - when this option is selected, no special wrapping style is applied.

    With this option selected, the nested alignment and braces settings are ignored.

  • Wrap if long - select this option to have lines going beyond the right margin wrapped with proper indentation.
  • Chop down if long - select this option to have elements in lists that go beyond the right margin wrapped so that there is one element per line with proper indentation.
  • Wrap always - select this option to have all elements in lists wrapped so that there is one element per line with proper indentation.

Alignment Options

Item Description
<character(s)> on next line Select this check box to have the specified character or characters moved to the next line when the lines are wrapped.
New line after <character> Select this check box to have the code after the specified character moved to a new line.
Place on new line Use this check box to have the corresponding statements or characters moved to the next line.
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.
Special else if treatment If 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

Item Description
Braces placement style Use this drop-down list to specify the position of the opening brace in class declarations, method 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.
Force braces From this drop-down list, choose the braces introduction method for if, for, while, and do () while statements. The available options are:
  • Do not force - select this option to suppress introducing braces automatically.
  • When multiline - select this option to have braces introduced automatically, if a statement occupies more than one line. Note that CLion analyzes the number of lines in the entire statement but not only its condition. For example, if the code is
    <?php if (true) return false;
    CLion will insert braces automatically:
    <?php if (true) { return false; }
  • Always - select this check box to have braces always introduced automatically.

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.

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

Code generation tab

Item Description
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.
C++
  • Prefix for fields: type the prefix that will prepend a name of an automatically generated field.
  • Suffix for fields: type the 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.
  • Suffix for getters: type a prefix that will prepend a name of an automatically generated setter. The default name is set.
Top-level declaration order Use the arrow keys to move the selected categories up or down.
Last modified: 11 March 2015
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