char-greaterp

Type:	-	predicate function (subr)
Source:	-	xlstr.c

Syntax

(char-greaterp char1 charN ... )

char1 - a character expression
charN - character expression(s) to compare
returns -  T  if the characters are of monotonically decreasing ASCII value, NIL otherwise
Note: case is not significant with this function

Description

The 'char-greaterp' predicate function takes one or more character arguments. It checks to see if all the character arguments are monotonically decreasing.  T  is returned if the arguments are of monotonically decreasing ASCII value. In the case of two arguments, this has the effect of testing if 'char1' is greater than 'char2'. This test is case insensitive, the character '#\a' is considered to be the same ASCII value as '#\A'.

Examples

(char-greaterp #\a #\b)      ; returns NIL
(char-greaterp #\b #\a)      ; returns T
(char-greaterp #\c #\b #\a)  ; returns T
(char-greaterp #\a #\a)      ; returns NIL
(char-greaterp #\c #\a #\b)  ; returns NIL
(char-greaterp #\A #\a)      ; returns NIL
(char-greaterp #\a #\A)      ; returns NIL

See the char-greaterp predicate function in the XLISP 2.0 manual.

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