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Mikael Djurfeldt 2003-04-17 19:40:49 +00:00
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doc/goops/goops.texi
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@ -2372,17 +2372,30 @@ as done by @code{scm-error}.
@node Object Comparisons @node Object Comparisons
@subsection Object Comparisons @subsection Object Comparisons
@deffn generic object-eqv? @deffn generic eqv?
@deffnx method object-eqv? ((x <top>) (y <top>)) @deffnx method eqv? ((x <top>) (y <top>))
@deffnx generic object-equal? @deffnx generic equal?
@deffnx method object-equal? ((x <top>) (y <top>)) @deffnx method equal? ((x <top>) (y <top>))
@deffnx generic =
@deffnx method = ((x <number>) (y <number>))
Generic functions and default (unspecialized) methods for comparing two Generic functions and default (unspecialized) methods for comparing two
GOOPS objects. GOOPS objects.
The default methods always return @code{#f}. Application class authors The default method for @code{eqv?} returns @code{#t} for all values
may wish to define specialized methods for @code{object-eqv?} and that are equal in the sense defined by R5RS and the Guile reference
@code{object-equal?} that compare instances of the same class for manual, otherwise @code{#f}. The default method for @code{equal?}
equality in whatever sense is useful to the application. returns @code{#t} or @code{#f} in the sense defined by R5RS and the
Guile reference manual. If no such comparison is defined,
@code{equal?} returns the result of a call to @code{eqv?}. The
default method for = returns @code{#t} if @var{x} and @var{y} are
numerically equal, otherwise @code{#f}.
Application class authors may wish to define specialized methods for
@code{eqv?}, @code{equal?} and @code{=} that compare instances of the
same class for equality in whatever sense is useful to the
application. Such methods will only be called if the arguments have
the same class and the result of the comparison isn't defined by R5RS
and the Guile reference manual.
@end deffn @end deffn
@node Cloning Objects @node Cloning Objects