What’s New in ReSharper C++

ReSharper C++ 2023.3 brings a new built-in grammar and spelling checker, code completion and Find Usages for inactive code, updates for C, C++, HLSL support, and more. The release of ReSharper 2023.3 C++ is also enhanced by a major update to JetBrains AI Assistant.


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AI Assistant is out of preview General Availability

JetBrains AI Assistant is now generally available with a number of new and improved features to increase your productivity. Our latest set of improvements includes better project awareness for AI Actions and a prompt library.

Use AI Assistant in ReSharper C++ as a supplemental feature with a JetBrains AI Service subscription.

HLSL and Unreal Engine updates

HLSL 2021 introduced C++-like template functions and data types. The latest ReSharper C++ update brings full support for HLSL templates.

ReSharper C++ 2023.3 introduces support for the HLSL built-in RayQuery type and enhances code completion to suggest the corresponding flags.

A new inspection helps you avoid falling into one of the common traps of the AddDynamic helper macro. You’ll now get a warning when a dynamic delegate function is not marked with the UFUNCTION macro.

If you still find yourself writing boilerplate code occasionally, don’t forget that the Alt+Insert shortcut is available to automatically generate common type members. In ReSharper C++ 2023.3, we’ve tuned the generation of hash functions to follow the Unreal Engine conventions.

If you’re interested in a stand-alone cross-platform IDE for Unreal Engine development, consider Rider. The Unreal Engine support in Rider and ReSharper C++ is aligned, and you can expect the same improvements in the Rider 2023.3 update.

C and C++ support

If you ever need to check whether some specific attribute is available in the current standard or compiler version, C++20’s feature testing is here to save the day. By using __has_cpp_attribute(operand) in preprocessor conditions, you can test whether the compiler recognizes the attribute referenced by its operand. ReSharper C++ now correctly handles __has_cpp_attribute to better support attribute annotations in C++ standard libraries.

We’ve introduced support for the pack pragma used with the __pragma keyword. The __pragma (pack) syntax is sometimes used inside macro definitions since it’s not possible to use #pragma directives inside a macro definition. In cases like this, ReSharper C++ now correctly computes sizes of packed structures so that you can rely on code analysis results.

ReSharper C++ adds support for several C features:

  • The C99 restrict type qualifier that can be used in pointer declarations.
  • Type deduction, constexpr, and nullptr from C23.

We’ve also introduced support for several new clang intrinsics, such as __is_const(), __is_member_pointer(), and others, to make ReSharper C++ work better with cross-platform code.

For cross-platform C and C++ development, you can try an early preview of the standalone CLion Nova IDE. It is powered by ReSharper C++, and absolutely free to use at this stage – simply register, start coding, and send us your feedback!

Grammar and spelling checking

JetBrains Grazie has become ReSharper’s new built-in grammar and spelling checker. Grazie supports over 20 languages and catches natural language errors within programming languages supported by ReSharper (C#, C++, VB.NET), markup languages (HTML, XML, XAML), and comments. To add other natural languages to Grazie, go to Options | Grammar and Spelling | General in ReSharper.

Please note that grammar checking is currently not available in doxygen comments.

Working with inactive code

With platform-specific or configuration-specific code, you may often find yourself editing currently inactive code blocks inside conditional preprocessor branches. Previously, code completion in inactive code only offered macros. In ReSharper C++ 2023.3, we’ve improved code completion in these scenarios to include symbols from the global scope.

Find Usages now finds possible usages in inactive code and macro bodies. Previously, if you wanted to find these usages, you had to use Find Usages Advanced and investigate textual occurrences. Now Find Usages results include potential usages in macro bodies and inactive code by default. These usages are grouped into separate sections to distinguish them from usages in active code.

Code analysis

You can use ReSharper-specific C++ attributes to make ReSharper analyze your solution with greater accuracy and insight. In ReSharper C++ 2023.3, we’ve added the [[jetbrains::...]] prefix in addition to [[rscpp::...]] for the existing [[jetbrains::format]], [[jetbrains::guard]], and [[jetbrains::has_side_effects]] attributes.

The new [[jetbrains::pass_by_value]] attribute lets you suppress the Pass value by const reference inspection for function parameters. Find out more.

We’ve introduced a set of inspections for incorrect usage of the export keyword in C++20 modules. ReSharper C++ now suggests removing export when another export declaration already encloses the declaration or when the declaration is not part of a module interface unit and cannot be exported. You’ll also get a suggestion to move export if you try templating the export declaration instead of exporting the template declaration.

We’ve upgraded the bundled clang-tidy binary to Clang 17, bringing updates from the latest LLVM release.

Some clang-tidy checks output more details in addition to the warning text. ReSharper C++ now shows these additional notes in the tooltip.

A new inspection warns about the usages of multicharacter literals. They are conditionally supported with implementation-defined values and should be used carefully in portable code.

ReSharper C++ now suggests a quick-fix to remove redundant conditional operators and simplify ternary conditional expressions.

Coding assistance

The Alt+Insert Generate menu helps you quickly create boilerplate code. In ReSharper C++ 2023.3, we’ve added a new action to the list, allowing you to generate a destructor.

When invoked in a polymorphic class, the action will use syntax style settings to insert the required virtual and/or override specifiers. You can configure the body style of the generated destructor on the Code Editing | C++ | Code Generation options page.

The #pragma region and #pragma endregion directives let you specify a foldable block of code. Similar to other matching directives, you can now jump between the two using the Go to Declaration action on a #pragma directive or a new inlay hint with the region name.

Furthermore, the File Structure window now allows you to conveniently fold regions and navigate to the corresponding code blocks.

In C code, void should be used in the parameter list of a function to indicate that the function doesn’t take any arguments. ReSharper C++ now preserves this special void when you invoke the Extract method or Change signature refactorings, generate a definition for the function, or create a new function from its usage.

Reference inlay hints now have a separate [>>] text so that you can spot forwarding references at a glance.

The new Generate inline definitions action lets you quickly generate bodies for several functions simultaneously. Similar to the existing Generate definitions, the new action is available when a class name or several function declarations are selected in the editor.

When you invoke the Introduce variable or Introduce field refactorings on a nested expression, ReSharper C++ now lets you choose the target expression explicitly instead of automatically using the outermost one.

To improve the code navigation experience, symbols that came from macro substitutions are now hidden from Go to and the File Structure window. This is helpful with macros that introduce many auxiliary symbols during their expansion, like declarations of test cases in popular unit-testing frameworks.

Code formatting

ReSharper C++ 2023.3 introduces several new formatting options:

  • Break line before -> in trailing return types.
  • Break line after -> in trailing return types.
  • Spaces within empty blocks.
  • Allow comments after {.

We’ve also upgraded the bundled clang-format binary to Clang 17 and implemented support for the InsertNewlineAtEOF clang-format setting both when importing formatter settings from a .clang-format config and when using clang-format instead of the built-in formatter.

Take a look at the What's New in ReSharper page to learn about all of the other changes introduced in this release.


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ReSharper C++ 2023.2

AI Assistant Limited access

AI Assistant is not bundled with ReSharper and must be installed separately. For the time being, there’s a waiting list for access to the AI Assistant feature.

Learn more about AI Assistant and how to install it via the Toolbox App or dotUltimate installer in our webhelp.

ReSharper C++ 2023.2 brings in the ReSharper AI Assistant – an AI-driven chat specifically designed to answer programming questions and help you with troubleshooting, refactoring, documenting, and other development workflows.

ReSharper’s AI Assistant takes into consideration the language and technologies used in your project. This context awareness tailors its responses right out of the gate, saving you time and effort.

Feel free to include parts of the source code in your queries. ReSharper will detect the code you sent or pasted into the chat and properly format it, while the AI model will explain the logic behind the code and help you refactor, find issues, or document it.

C++23 support

The if consteval statement is a new constant evaluation feature in C++23 that further develops the idea of C++20 consteval and std::is_constant_evaluated(). If the evaluation of the if consteval statement occurs during a constant evaluation, then the following compound statement is executed. Otherwise, the else branch is executed.

ReSharper C++ introduces support for if consteval and brings a set of related inspections:

  • consteval if is always constant.
  • std::is_constant_evaluated always evaluates to a constant.
  • if can be replaced by if consteval.

ReSharper C++ now supports the named modules std and std.compat introduced in the C++23 standard library. If you use Visual Studio 17.6 or later, you can now use import std or import std.compat to import the entire standard library instead of using a precompiled header or including specific standard library headers.

Before C++23, all operators had to be non-static member functions. Call operators, however, are often used with member-less function objects, and allowing operators to be static in this case can lead to more efficient code. C++23 allows both operator() and operator[] to be static.

C++20 support

We’ve been working hard on polishing the C++20 modules support, fixing various corner issues in real-world projects that use modules. When processing modules internally, ReSharper C++ now implements the discarding of declarations that are not decl-reachable, significantly improving performance on modules that include a lot of headers into the global module fragment.

In addition, we’ve implemented several changes to better support modules in CMake projects. ReSharper C++ now recognizes .cppm files as module interfaces and includes experimental support for modules located outside of the project folder.

C++20’s new [[no_unique_address]] attribute indicates that a unique address is not required for a non-static data member of a class, allowing the compiler to lay out members of the class in a more efficient way. ReSharper C++ now takes [[no_unique_address]] into account when calculating the size of an object.

ReSharper C++ 2023.2 also implements the recently accepted C++20 defect report that allows the initialization of a char or unsigned char array with a UTF-8 string literal.

Safe Delete refactoring

ReSharper C++ introduces the Safe Delete refactoring to let you safely remove symbols from your source code. This refactoring is available for classes, functions, variables, enumerators, namespaces, and even concepts.

To invoke the refactoring, place the caret on the symbol you want to delete and press Alt+Del, or select Safe Delete from the Refactor This menu.

Before deleting a symbol, ReSharper C++ searches for its usages and lets you preview the changes to the source code, so you can be sure that all the removals are intended. If you try to delete a complex entity like a class or a namespace, ReSharper C++ will recursively check the usages for all its members.

Unreal Engine

This release brings performance improvements for indexing Blueprints. The first time you open a project, ReSharper C++ indexes all of your Blueprint assets to power features like Find Usages and show the values of serialized data directly in the text editor.

Previously, ReSharper C++ would index these assets at the same priority as your C++ code, meaning that it took longer before the project was ready for work. ReSharper C++ 2023.2 will index assets in the background after indexing your C++ code without interfering with your work.

We’ve improved smart completion for wrapper types with standard assignment semantics. For example, when assigning to a variable of the TEnumAsByte type, completion will suggest enumerators from the underlying enumeration type.

For Unreal Engine 5.1 projects, we’ve introduced support for the UE_INLINE_GENERATED_CPP_BY_NAME macro, which lets you inline generated files into your module to improve compilation time.

Coding assistance

With improved completion for dependent code, you will now get completion items when the type is restricted by a concept or a trait. ReSharper C++ now considers the standard std::is_same/std::is_base_of type traits, their _v value-aliases, the corresponding std::same_as/std::derived_from concepts, and the Unreal Engine TIsSame trait.

For more helpful code completion suggestions, ReSharper C++ now also extracts type and value requirements from requires-clauses, if constexpr, and SFINAE.

There are two new complementary context actions to help you move a template parameter constraint to the requires-clause and convert a requires-clause to a template parameter constraint.

If you have a recursive call, ReSharper C++ will mark it in the gutter, making it more visible.

The code completion list now filters out reserved identifiers and suggests them only after _. This means you no longer have to scroll through the suggestions from standard libraries unless you need them.

ReSharper C++ 2023.1 introduced proper highlighting and formatting for macro substitution in the Quick Documentation popup and tooltips on hover. In the 2023.2 release, these improvements will also work for macro definitions and Parameter Info in code completion.

We’ve improved the evaluation engine to support aggregate initialization of constexpr arrays.

We've improved compatibility with GCC and Clang compilers and libc++/libstdc++ standard libraries. This includes support for more builtins like __integer_pack, __is_convertible/__is_nothrow_convertible, and updates for the previously supported ones.

When you specify the parameter direction with the [in], [in,out], or [out] attribute of the Doxygen param command, the tooltips now fetch them from your comment.

Code analysis

ReSharper C++ 2023.2 adds a new inspection that detects redundant dereferencing and address-of operators. It offers you several quick-fixes to simplify member access and remove redundant operators.

Another new inspection highlights redundant template arguments that match the corresponding default template argument and can be omitted.

A new compatibility inspection warns you about forward declarations of C-style enums without an underlying type, which are forbidden by the C++ standard but accepted by MSVC, possibly causing non-portable code.

ReSharper C++ now highlights the #error and #warning diagnostic preprocessor directives according to their severity level.

We’ve also updated the bundled clang-tidy binary to Clang 16, providing new checks and fixes.

MSVC can use either the traditional or the new standard-conforming preprocessor depending on the value of the /Zc:preprocessor compiler argument. ReSharper C++ now reads the value of this argument from the project properties and adjusts the behavior of the built-in preprocessor accordingly.


ReSharper C++ 2023.2 brings several improvements to Go to declaration for more consistent and straightforward code navigation without extra steps:

  • When invoked on a class name in a constructor call, Go to declaration now navigates to the constructor instead of the containing class.
  • Go to declaration now navigates to the first typedef or type alias declaration instead of showing the menu with all declarations.
  • Go to declaration on a module name jumps between interface and implementation units for the same module.
  • Go to declaration on a folder in an #include path opens the folder.

Additionally, Type of symbol is now available on non-declarator symbols. The way it works there is similar to Go to declaration.

Formatting and typing assist

When generating documentation comments, ReSharper C++ will now adjust the documentation template according to the comment style from the editor. For /**, typing assistance will generate the comment in the /** */ style, and for ///, the comment will be in the /// style.

This release brings several improvements to the formatting of bit-field members. The options to align initializers and declaration names in columns now support bit-fields. There are also two new formatting settings for spaces before and after the colon in bit-field declarations and for alignment of bit-field sizes in columns.

A new typing assist option lets you turn off the generation of documentation comments to avoid conflicts with Visual Studio's built-in generator (ReSharper | Options | Environment | Editor | Behavior | C++, C, HLSL | Generate documentation comments).

We've also updated the bundled clang-format binary and fixed the clang-format engine to prevent it from removing the newline at the end of a file.

Take a look at What's New in ReSharper to learn about the other changes introduced in this release. For example, ReSharper introduces the predictive debugger, which foresees all possible states triggered by executing a program without having to actually execute it.

ReSharper C++ 2023.1

Macro substitution previews

When hovering over a macro, you can now see its expansion preview in the tooltip, with full syntax highlighting and proper code formatting. You can still use the Substitute macro call context action to expand it right in the editor, but the instant preview makes working with macros easier.

The Quick Documentation popup (Ctrl+Shift+F1) also allows you to click on any entity from the substitution preview and check out its documentation. If the macro expansion contains an unknown identifier, it will be highlighted in the substitution preview in both the on-hover tooltip and the Quick Documentation popup to help you spot issues.

C++20 modules

ReSharper C++ 2022.3 introduced initial support for C++20 modules. In this update, we’ve been polishing our implementation to handle more corner cases and better support real-world projects that make use of them. We’ve also expanded the list of ReSharper C++ features that help you write modularized code.

Find usages now lets you find all locations where a given module is imported.

The Rename refactoring helps you safely rename modules and module partitions, updating all the relevant declarations and imports in your code.

Code completion offers improved support for the C++20 modules syntax. Names of known modules are suggested when you are about to import one, and the completion list also includes the module-related keywords where they are allowed.

We’ve also updated several coding assistance features to support C++20 modules. The code formatter and Rearrange code now handle export blocks and exported entities. To reorder code elements, press Ctrl+Shift+Alt with the caret on the code element or with a code selection, and then press the corresponding arrow key.

C++23 support

The ISO C++ Standards Committee has recently completed the technical work on C++23. With many C++23 features already available in the major compilers, ReSharper C++ 2023.1 is here to help you try them out.

Deducing this is a major C++23 feature that introduces a new way to specify member functions. You can now make the object parameter explicit with the this keyword, which simplifies the implementation of several C++ idioms. For example, you can now replace identical function overloads that differ only by their const and reference qualifiers with just one function that deduces the type and value category of the object parameter.

C++23 brings more ways to use auto. With auto(x) and auto{x} you can make a copy of the argument as if it were passed as a function argument by value.

ReSharper C++ also supports the following C++23 updates that streamline the existing language syntax:

  • Empty parentheses () in lambdas are now optional in many cases.
  • Alias declarations are now allowed in init statements.
  • Labels are now allowed at the end of compound statements.

Unreal Engine

You can now quickly add a simple or a complex Unreal Engine test using the new built-in file templates. Just go to Solution Explorer and right-click on the preferred project folder to open the Add menu (or use Ctrl+Alt+Insert).

ReSharper C++ also provides a new UINTERFACE live template, complementing the existing UCLASS, USTRUCT, and UENUM templates. Simply select the corresponding item in the code completion list to add a new interface class when working on an Unreal Engine project.

You can now specify source directory mappings that will be used to resolve #include directives in shader files. If you have RiderLink installed in the game or engine project, you can also load shader mappings directly from Unreal Engine.

A new completion item lets you generate a lambda expression where a delegate, TFunction, or TFunctionRef argument is expected.

If you are interested in a stand-alone cross-platform IDE for Unreal Engine development, consider Rider. The Unreal Engine support in Rider and ReSharper C++ is aligned, and you can expect the same improvements in the Rider 2023.1 update.

Call tracking

ReSharper’s Call tracking has finally come to ReSharper C++! You can now view and navigate through call chains in the hierarchy of incoming calls. Just place the caret at any function and select Inspect | Incoming calls from the context menu or press Ctrl+Shift+Alt+A to invoke it from the Inspect This menu.

In the call tracking results window, you can double-click on the hierarchy entry to navigate to the corresponding call in the editor or expand any node to check out its incoming calls.

Tracking outgoing calls is currently not supported.

Code analysis

We’ve introduced an inspection that flags function parameters of expensive-to-copy types that are passed by value. In such cases, ReSharper C++ suggests passing the parameter by const reference instead. On the other hand, the Create function from usage fix will now prefer to pass parameters of types that are cheap to copy by value.

The following new code inspections warn you about potential code smells:

  • One inspection identifies unused template parameters and type aliases in a local scope, as well as redundant base class initializers.
  • Another inspection marks unused return values of functions that return HRESULT or NTSTATUS error codes.

One more inspection lets you know when C++17 class template argument deduction fails to deduce the template arguments, allowing you to quickly add the required arguments with a fix.

ReSharper C++ 2023.1 also includes many improvements for the compile-time evaluation engine, such as the evaluation of range-based for loops and better support for unions.


You can now access most of the refactorings easily from the Alt+Enter menu in addition to the dedicated Refactor This popup (Ctrl+Shift+R).

The new Create parameter fix provides a convenient shortcut to the Change signature refactoring. When you need to add a new parameter to a containing function, just invoke the fix and enter the type of the new parameter. The refactoring will update all the function declarations and usages, notifying you of any conflicts.

Calling the Extract method and Change signature refactorings is now more straightforward.

  • If you need to extract a one-line function, you no longer have to select the whole line, since the refactoring now extracts the current line when no selection is active.
  • Change signature can now be invoked while the caret is anywhere in the function signature instead of just on the name of the function, as was previously the case.

Other enhancements

ReSharper C++ now supports the __VA_OPT__ macro, which was introduced in C++20 to help define variadic macros. This special functional macro expands to its arguments when the variable argument list is not empty and expands to nothing otherwise.

By default, file paths are put before folders when sorting #include directives. If you prefer to have all includes in alphabetical order, you can now disable the new Put files before folders option.

A new postfix template allows you to quickly make a const reference with std::as_const or AsConst in Unreal Engine projects.

Comments beginning with /* are no longer auto-closed with */ by default. You can enable auto-insertion of the closing comment with the new Insert */ after /* typing-assist option.

Take a look at What's New in ReSharper to learn about the other changes introduced in this release. For example, CSS support is now disabled by default.