Compile time operators

Question

Could someone please list a all compile time operators in available in C++?

Answer 1

There are two operators in C++ whose result can always be determined at compile-time, regardless of the operand(s), and those are sizeof[1] and ::[2].

Of course there are plenty of particular uses of other operators that can be resolved at compile-time, for example those listed in the standard for integer constant expressions.

[1] C99, unlike C++, has variable length array types. sizeof applied to a VLA can't be determined at compile-time. Some C++ compilers provide VLAs as an extension.

[2] that is, it can be determined at compile time what entity is the result of the expression. If the entity is an object, then the object's value is another matter.