Code Inspection and Quick-Fixes in C++
The key features of ReSharper's code analysis are also supported in C++. You can find the detailed information on these features in the corresponding topics of the Code Analysis 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 code analysis features in C++.
Code Inspection
ReSharper's static code analysis detects most of compiler errors and some compiler warnings in C++ files.
Besides, it finds other code issues, which otherwise would be found in runtime. For example, using a virtual method in constructor leads to unexpected behavior as mentioned in this StackOverflow question. ReSharper points at this problem before you even compile:
The analysis is performed by applying code inspections to the current document or in any specified scope.
To learn how to customize code inspection, see Configuring Code Inspection Settings.
Quick-fixes
Quick-fixes let you automatically resolve most of code issues found with code inspection. If one or more quick-fixes are available for a code issue, you will see the corresponding action indicator when your caret is on the highlighted code. Press Alt+Enter to see and apply the desired fix.
ReSharper provides over 50 quick-fixes for C++. Here are some examples:
Create from usage
If you use an undeclared symbol, ReSharper suggests one or more quick-fixes for creating the symbol based on the usage:
Create declaration
If a member function in a C++ file does not have declaration in the header file, ReSharper helps you create the missing declaration according to the signature of the implementation:
Add missing #include directive
if you use a type that is defined in the standard libraries or elsewhere in your project, ReSharper helps you add the missing #include directives automatically:
Remove unused #include directives
All unused #include are highlighted and can be easily removed with a quick-fix:
Initialize variable
ReSharper detects uninitialized variables and helps initializing them with the default value:
Replace the dot (.) with arrow (->) and vice versa
If the dot(.) operator is erroneously applied to a pointer, ReSharper helps you replace it with the arrow (->) operator:
The reverse quick-fix is also available:
Change variable type
If the specified type of a variable or a field does not match to the assigned value, ReSharper provides a quick-fix to use the correct type in the declaration:
Change return type
If a function return type does not match the value it actually returns, ReSharper lets you quickly fix the return type:
Making ReSharper ignore specific code
ReSharper allows you to ignore specific files, folders and file masks in different ways. You can configure ignored files on the following options pages:
- to exclude files, folders, and masks from code inspection.
- to partly disable code inspection for generated code.
- to specify files and folders that should be ignored by Navigation by Name commands.
- to add C++, JavaScript, TypeScript, CSS, HTML and JSON files, folders and wildcards to be treated either as 'skipped' or 'library'. ReSharper will completely ignore 'skipped' files, and treat 'library' files as read-only — indexed for navigation, but no inspections, quick-fixes and refactorings.