CLion 2025.2 Help

Advanced completion

Type-matching completion

Smart type-matching code completion filters the suggestion list and shows only the types applicable to the current context.

Invoke type-matching completion

  • To invoke type-matching completion, start typing and press Ctrl+Shift+Space or select Code | Code Completion | Type-Matching from the main menu.

    Smart type completion

Statement completion

You can create syntactically correct code constructs by using statement completion. It inserts the necessary syntax elements (parentheses, braces, and semicolons) and gets you in a position where you can start typing the next statement.

To invoke statement completion, start typing a code construct and press Ctrl+Shift+Enter.

Complete Statement works with the following language constructs:

  • Type and type members: classes, namespaces, and enums.

  • Statements: if/else, while, do, for, switch/case, try/catch.

Complete a function declaration

  • Start typing a function declaration and press Ctrl+Shift+Enter after the parenthesis.

    Before Complete Statement

    After Complete Statement

    void myFunc(/*caret*/
    void myFunc();/*caret*/

Complete a code construct

  • Start typing a code construct and press Ctrl+Shift+Enter.

    CLion automatically completes the construct and adds end. The caret is placed at the next editing position.

    Use case

    Before Complete Statement

    After Complete Statement

    Class declaration

    class NewClass /*caret*/
    class NewClass { /*caret*/ };

    switch clause

    switch/*caret*/
    switch (/*caret*/) {}
    switch (i /*caret*/) {}
    switch (i) { /*caret*/ }

    while statement

    while/*caret*/
    while (/*caret*/) {}
    while (n > 0/*caret*/) {}
    while (n > 0) { /*caret*/ }

    if statement

    if /*caret*/
    if (/*caret*/) {}
    if (n > 0/*caret*/) {}
    if (n > 0) { /*caret*/ }

    for statement

    for /*caret*/
    for (/*caret*/) {}
    for (int i = 0; i < 10; ++i/*caret*/) {}
    for (int i = 0; < 10; ++i) { /*caret*/ }

    Try-catch statement

    try /*caret*/
    try { /*caret*/ }
    catch /*caret*/
    catch (/*caret*/) { }
    catch (const std::exception/*caret*/) {}
    catch (const std::exception) { /*caret*/ }

Hippie completion

Hippie completion is a completion engine that analyses your text in the visible scope and generates suggestions from the current context. It helps you complete any word from any of the currently opened files.

Expand a string at caret to an existing word

  1. Type the initial string and do one of the following:

    • Press Alt+/ or choose Code | Code Completion | Cyclic Expand Word to search for matching words before the caret.

    • Press Alt+Shift+/ or choose Code | Code Completion | Cyclic Expand Word (Backward) to search for matching words after the caret and in other open files.

    The first suggested value appears, and the prototype is highlighted in the source code.

    Expand word

  2. Accept the suggestion or hold the Alt key and keep pressing \ until you find the word you need.

23 September 2025
Full Line code completionPostfix completion