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bug #1462278: small fix in documentation of __op__ vs __rop__ methods

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Georg Brandl 2006-04-01 07:23:08 +00:00
parent 23fd3d49e9
commit e071b001ca
1 changed files with 9 additions and 8 deletions
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Doc/ref/ref3.tex
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@ -2057,14 +2057,15 @@ exception is raised. But see the following exception:
\item
Exception to the previous item: if the left operand is an instance of
a built-in type or a new-style class, and the right operand is an
instance of a proper subclass of that type or class, the right
operand's \method{__rop__()} method is tried \emph{before} the left
operand's \method{__op__()} method. This is done so that a subclass can
completely override binary operators. Otherwise, the left operand's
__op__ method would always accept the right operand: when an instance
of a given class is expected, an instance of a subclass of that class
is always acceptable.
a built-in type or a new-style class, and the right operand is an instance
of a proper subclass of that type or class and overrides the base's
\method{__rop__()} method, the right operand's \method{__rop__()} method
is tried \emph{before} the left operand's \method{__op__()} method.
This is done so that a subclass can completely override binary operators.
Otherwise, the left operand's \method{__op__()} method would always
accept the right operand: when an instance of a given class is expected,
an instance of a subclass of that class is always acceptable.
\item