Date/Time & Regex in C++
From the C++ cheat sheet · Numbers, Date/Time & Regex · verified Jul 2026
Date/Time & Regex
std::chrono and std::regex.
cpp
// Quick Reference
#include <chrono>
auto start = std::chrono::steady_clock::now();
// ...
auto ms = std::chrono::duration_cast<std::chrono::milliseconds>(
std::chrono::steady_clock::now() - start);💡 Use steady_clock for measuring durations; system_clock for wall-clock/calendar time.
⚡ Raw string literals R"(...)" let you write regex patterns without doubling backslashes.
📌 duration_cast converts between time units; .count() extracts the numeric value.
🟢 std::regex_search finds a match anywhere; regex_match requires the whole string to match.
chronoregex