defmacro

defmacro( 
s_macroName 
( l_formalArglist ) 
g_expr1 ... 
)
=> s_macroName

Description

Defines a macro which can take a list of formal arguments including @optional, @key, and @rest (instead of the more restrictive format as required by using mprocedure).

The arguments will be matched against the formals before evaluating the body.

Arguments

s_macroName	Name of the macro you are defining.
l_formalArglist	Formal argument list.
g_expr1	Expression or expressions to be evaluated.

Value Returned

s_macroName

The name of the macro being defined.

Examples

defmacro( whenNot (cond @rest body)
    ‘(if ! ,cond then ,@body) )
=> whenNot

expandMacro( '(whenNot x > y z = f(y) x*z) )
=> if(!(x > y) then (z = (f y))(x * z))

whenNot(1 > 2 "hello" 1+2)
=> 3

Related Topics

Function and Program Structure

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