Dev Tools · 4h ago
C++ Float-to-Int Conversion Can Trigger Undefined Behavior
A new blog post reveals that converting floating-point numbers to integers in C++ can lead to undefined behavior when the value is out of range. This affects code relying on such conversions for performance or correctness. Developers are urged to use safer alternatives like std::lrint or explicit bounds checks.
Meridian48 take
This is a subtle but critical gotcha for C++ developers, especially in performance-sensitive systems where undefined behavior can cause silent failures.
c++undefined-behavior