3.10 Macro Pitfalls

In this section we describe some special rules that apply to macros and macro expansion, and point out certain cases in which the rules have counter-intuitive consequences that you must watch out for.

Misnesting:   
Operator Precedence Problems:   
Swallowing the Semicolon:   
Duplication of Side Effects:   
Self-Referential Macros:   
Argument Prescan:   
Newlines in Arguments: