Coding Assistance in C++
Most of ReSharper's coding assistance features are also supported in C++. You can find the detailed information on these features in the corresponding topics of the Coding Assistance section. In the main topic of the section, you can also find the feature matrix and check what exactly is supported in C++.
In this topic, you can find some examples of using coding assistance features in C++:
- Code completion
- Syntax highlighting and tooltips
- Context Actions
- Highlighting paired items
Automatic and basic completion
Dot/arrow completion helpers
When you call a method, you can always type a dot (
.) or an arrow (
->) and get all available methods in the completion list. The methods that do not match
-> are displayed in grey. If you choose such method, the
-> will be corrected automatically:
Generative completion suggestion are also available. For example, when you call a member function declaration on the object...
ReSharper generates the following function:
Postfix completion in C++ is very much like C# extension methods. If you type a dot (
.) or an arrow (
->) after an expression, ReSharper will suggest free functions that would accept that expression as the first parameter. When you accept the suggestion, ReSharper will rewrite your code so that the expression is passed as the first argument:
Postfix completion also includes postfix templates which, instead of looking up for suitable methods, let you quickly wrap an expression with frequently used language constructs.
Free functions in code completion
One common C++ coding practice is to prefer non-member non-friend functions to member functions. This is a great way to increase encapsulation and keep class interfaces as minimal as possible. When you type a dot (
.) or an arrow (
->) after an expression, free functions that accept the expression as the first parameter will be suggested in the completion list after member functions:
If you do not want to have free functions in the completion suggestions, you can clear the corresponding check box on thepage of ReSharper options.
Syntax highlighting and tooltips
By default, ReSharper provides extended highlighting of C++ syntax with configurable colors. If necessary, you can disable it on thepage of ReSharper options. There are 20 identifier types that you can highlight differently. You can change colors and fonts at any time in Visual Studio options ( ).
ReSharper also replaces Visual Studio tooltips for code elements with its own tooltips, which have highlighted syntax, display method and field signatures, formatted XML and Doxygen comments:
If necessary, you can disable ReSharper tooltips by clearing the Replace Visual Studio tooltips check box on the page of ReSharper options. Note also that ReSharper tooltips are only available if the syntax highlighting is enabled.
ReSharper provides a set of context actions that target C++ code. You can find the full list of these actions in the Code Editing | C++ | Context actions page of ReSharper Options. If necessary, you can also disable some of the actions using this page.
As soon as a context action becomes available for the current caret position, ReSharper displays the corresponding action indicator to the left of the caret. Sometimes however, ReSharper provides several contextually available features for the current caret position. In this case, the action indicator corresponding to the action with the highest priority is shown, and all other actions only appear when you expand the action list by clicking on the action indicator or pressing Alt+Enter Context actions have the lowest priority, therefore, they often appear at the bottom of the action list:
Here are some examples of context actions for C++:
Generate missing case statements
Instead of manually writing all case statements when switching over an enum, you can use the context action that generates all missing case statements: All you have to do then is to write the required logic for each statement.
Merge nested 'if' statements
ReSharper helps you merge nested 'if' statements with the context action:
ReSharper helps you automatically create a stub implementation of a function or a method. You can always generate an inline implementation and, if the function is defined in a header file and there is the corresponding source file, you can generate the implementation in the source file.
Move implementation out of class scope
ReSharper helps you move the implementation of a function or a method from a header to the corresponding source file if it exists. After applying this context action the definition is left in its original place and the implementation is moved to the source file. The editor context is switched to the source file as well.
You can also use the context action to move all implementations in the current selection.
Highlighting paired items
ReSharper highlights various matching items when you set the caret to one item of the pair:
- Matching delimiters (
- Matching macros, for example,
- Matching format specifier and argument in