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  ANSI Common Lisp   22 Printer   22.4 Dictionary of Printer

22.4.2 formatter Macro

Syntax:
formatter control-string    function

Arguments and Values:
control-string - a format string; not evaluated.

function - a function.

Description:
Returns a function which has behavior equivalent to:

  #'(lambda (*standard-output* &rest arguments)
      (apply #'format t control-string arguments)
      arguments-tail)

where arguments-tail is either the tail of arguments which has as its car the argument that would be processed next if there were more format directives in the control-string, or else nil if no more arguments follow the most recently processed argument.

Examples:
(funcall (formatter "~&~A~A") *standard-output* 'a 'b 'c)
 AB
 (C)

(format t (formatter "~&~A~A") 'a 'b 'c)
 AB
  NIL

Exceptional Situations:
Might signal an error (at macro expansion time or at run time) if the argument is not a valid format string.

See Also:
format

Allegro CL Implementation Details:
None.

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