C++ compile-time programming

It is good practice to write a lot of compile-time evaluatable expressions rather than resorting to as-if optimization of the compiler.

The more expressions we can evaluate at compile-time, the more performance gain is given.

• Constexpr variables (discussed in upcoming lesson 5.6 – Constexpr variables).
• Constexpr functions (discussed in upcoming lesson F.1 – Constexpr functions).
• Templates (introduced in lesson 11.6 – Function templates).
• static_assert (discussed in lesson 9.6 – Assert and static_assert).