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(cpp-300.info)Macro Pitfalls

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Macro Pitfalls
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   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