Buy the book!
|[ < ]||[ > ]||[ << ]||[ Up ]||[ >> ]||[Top]||[Contents]||[Index]||[ ? ]|
The basic facts of macro expansion have counterintuitive consequences. This section describes some important consequences that can lead to trouble, and rules to follow to avoid trouble.
13.6.1 Wrong Time Do the work in the expansion, not in the macro. 13.6.2 Evaluating Macro Arguments Repeatedly The expansion should evaluate each macro arg once. 13.6.3 Local Variables in Macro Expansions Local variable bindings in the expansion require special care. 13.6.4 Evaluating Macro Arguments in Expansion Don't evaluate them; put them in the expansion. 13.6.5 How Many Times is the Macro Expanded? Avoid depending on how many times expansion is done.
|webmaster donations bookstore||delorie software privacy|
|Copyright © 2003 by The Free Software Foundation||Updated Jun 2003|