How do I use SFINAE to conditionally enable code?

SFINAE (Substitution Failures Is Not An Error) is a powerful C++ feature that allows you to conditionally enable or disable templates and functions based on type traits. This technique helps you write more generic and reusable code while preventing compilation errors in certain contexts.

Here's a simple example demonstrating the use of SFINAE to conditionally enable a function based on whether a type is integral or not:

#include #include // Primary template for enable_if template struct MyClass; // Specialization for integral types template struct MyClass::value>::type> { void func() { std::cout << "Integral type!" << std::endl; } }; // Specialization for floating-point types template struct MyClass::value>::type> { void func() { std::cout << "Floating-point type!" << std::endl; } }; int main() { MyClass integerType; integerType.func(); // Output: Integral type! MyClass floatType; floatType.func(); // Output: Floating-point type! return 0; }

SFINAE C++ templates type traits enable_if integral types floating-point types conditional code

Related Questions

How do I avoid rehashing overhead with std::set in multithreaded code?

How do I find elements with custom comparators with std::set for embedded targets?

How do I erase elements while iterating with std::set for embedded targets?

How do I provide stable iteration order with std::unordered_map for large datasets?

How do I reserve capacity ahead of time with std::unordered_map for large datasets?

How do I erase elements while iterating with std::unordered_map in multithreaded code?

How do I provide stable iteration order with std::map for embedded targets?

How do I provide stable iteration order with std::map in multithreaded code?

How do I avoid rehashing overhead with std::map in performance-sensitive code?

How do I merge two containers efficiently with std::map for embedded targets?