Info Catalog elisp: Defining Macros elisp: Macros elisp: Indenting Macros

elisp: Problems with Macros

 
 13.5 Common Problems Using Macros
 =================================
 
 Macro expansion can have counterintuitive consequences.  This section
 describes some important consequences that can lead to trouble, and
 rules to follow to avoid trouble.
 

Menu

 
· Wrong Time             Do the work in the expansion, not in the macro.
· Argument Evaluation    The expansion should evaluate each macro arg once.
· Surprising Local Vars  Local variable bindings in the expansion
                               require special care.
· Eval During Expansion  Don’t evaluate them; put them in the expansion.
· Repeated Expansion     Avoid depending on how many times expansion is done.
 

Info Catalog elisp: Defining Macros elisp: Macros elisp: Indenting Macros