ToC DocOverview CGDoc RelNotes Index PermutedIndex
Allegro CL
Home Previous Up Next Table of Contents Index
  ANSI Common Lisp   13 Characters   13.1 Character Concepts   13.1.4 Character Categories

13.1.4.1 Graphic Characters

Characters that are classified as graphic, or displayable, are each associated with a glyph, a visual representation of the character.

A graphic character is one that has a standard textual representation as a single glyph, such as A or * or =. Space, which effectively has a blank glyph, is defined to be a graphic.

Of the standard characters, newline is non-graphic and all others are graphic; see Section 2.1.3 Standard Characters.

Characters that are not graphic are called non-graphic. Non-graphic characters are sometimes informally called "formatting characters" or "control characters."

#\Backspace, #\Tab, #\Rubout, #\Linefeed, #\Return, and #\Page, if they are supported by the implementation, are non-graphic.


Home Previous Up Next Table of Contents Index
© Franz Inc. 1998-2015 - File last updated 03-23-2015