cpp-pro

Define a concept with the concept keyword, such as template<typename T> concept Numeric = std::integral<T> || std::floating_point<T>, then use it as a constraint on template parameters. This produces clearer error messages than SFINAE and documents interface requirements directly in the signature.

Use AVX2 intrinsics from immintrin.h to process eight floats per instruction with functions like _mm256_loadu_ps and _mm256_fmadd_ps. Combine SIMD with cache-friendly Structure of Arrays layouts and benchmark with Google Benchmark to verify speedups.

Run AddressSanitizer for memory errors, UndefinedBehaviorSanitizer for UB, ThreadSanitizer for data races, and MemorySanitizer for uninitialized reads. Enable them via CMake build types with flags like -fsanitize=address and fix all reported issues before proceeding.

Catch2 offers a lightweight header-style API with TEST_CASE and SECTION macros plus built-in benchmarking, while GoogleTest provides fixtures, parameterized tests, and mocking via gMock. Both integrate with CMake and CTest; choose based on whether you need mocking support.

Avoid lock-free structures when contention is low or correctness matters more than throughput, since they carry risks like the ABA problem and complex memory ordering requirements. A std::mutex or std::shared_mutex with RAII locks is simpler and often fast enough.