basics

Don’t pass lambdas (or other multi-line entities) as parameters to macros--Raymond Chen

Not helping you.

Don’t pass lambdas (or other multi-line entities) as parameters to macros

by Raymond Chen

From the article:

Consider this macro:

#ifdef DEBUG
#define LOG(value) LogValue(value)
#else
// In production, evaluate but don't log.
#define LOG(value) (value)
#endif

This seems not entirely unreasonable, but bad things happen if you pass a multi-line entity as the macro parameter...

Quick Q: How to use auto keyword to assign a variable of type uint32_t or uint64_t in C++

Quick A: Write the type!

Recently on SO:

How to use auto keyword to assign a variable of type uint32_t or uint64_t in C++

I'm assuming you're working with the AAA style suggested by Herb Sutter.

In that case, a nice solution is to simply write:

auto variable_name = uint64_t{ 5000000000 };

This is clear, consistent, and explicitly typed with no nasty C-preprocessor necessary.