5 docs tagged with "macros"

A runtime level check is cheap, but it isn't free — it's still a branch and, on the disabled path,

Overview

The preprocessor is a text manipulation tool that runs before compilation. It handles #include, #define, #ifdef, and other directives, producing pure C++ code for the compiler.

Writing tojson/fromjson by hand for a plain data struct is mostly boilerplate — list the

File, line, and function are free only if the call site captures them — which is exactly why they're