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(Equality Predicates): Null strings are uniquified.

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Richard M. Stallman 2007-10-26 09:49:54 +00:00
parent c1d2409c37
commit f2b480f4ba
2 changed files with 14 additions and 1 deletions
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6
doc/lispref/ChangeLog
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@ -1,3 +1,9 @@
2007-10-26 Richard Stallman <rms@gnu.org>
* objects.texi (Equality Predicates): Null strings are uniquified.
* minibuf.texi: Minor clarifications in previous change.
2007-10-25 Glenn Morris <rgm@gnu.org>
* customize.texi (Variable Definitions): Add :risky and :safe keywords.

9
doc/lispref/objects.texi
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@ -1871,7 +1871,7 @@ This function returns a symbol naming the primitive type of
@cindex equality
Here we describe two functions that test for equality between any two
objects. Other functions test equality between objects of specific
objects. Other functions test equality of contents between objects of specific
types, e.g., strings. For these predicates, see the appropriate chapter
describing the data type.
@ -1904,6 +1904,13 @@ by the same change in the contents of the other.
@result{} nil
@end group
@group
(eq "" "")
@result{} t
;; @r{This exception occurs because Emacs Lisp}
;; @r{makes just one multibyte empty string, to save space.}
@end group
@group
(eq '(1 (2 (3))) '(1 (2 (3))))
@result{} nil