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  ANSI Common Lisp   22 Printer   22.4 Dictionary of Printer

22.4.10 pprint-tab Function

Syntax:
pprint-tab kind colnum colinc &optional stream    nil

Arguments and Values:
kind - one of :line, :section, :line-relative, or :section-relative.

colnum - a non-negative integer.

colinc - a non-negative integer.

stream - an output stream designator.

Description:
Specifies tabbing to stream as performed by the standard ~T format directive. If stream is a pretty printing stream and the value of *print-pretty* is true, tabbing is performed; otherwise, pprint-tab has no effect.

The arguments colnum and colinc correspond to the two parameters to ~T and are in terms of ems. The kind argument specifies the style of tabbing. It must be one of :line (tab as by ~T), :section (tab as by ~:T, but measuring horizontal positions relative to the start of the dynamically enclosing section), :line-relative (tab as by ~@T), or :section-relative (tab as by ~:@T, but measuring horizontal positions relative to the start of the dynamically enclosing section).

Exceptional Situations:
An error is signaled if kind is not one of :line, :section, :line-relative, or :section-relative.

See Also:
pprint-logical-block

Allegro CL Implementation Details:
None.

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