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Add class decorators

This commit is contained in:
Andrew M. Kuchling 2008-03-13 11:07:35 +00:00
parent 2e25551ef8
commit d51e842a3f
1 changed files with 8 additions and 1 deletions
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9
Doc/reference/compound_stmts.rst
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@ -50,6 +50,7 @@ Summarizing:
: | `with_stmt` : | `with_stmt`
: | `funcdef` : | `funcdef`
: | `classdef` : | `classdef`
: | `decorated`
suite: `stmt_list` NEWLINE | NEWLINE INDENT `statement`+ DEDENT suite: `stmt_list` NEWLINE | NEWLINE INDENT `statement`+ DEDENT
statement: `stmt_list` NEWLINE | `compound_stmt` statement: `stmt_list` NEWLINE | `compound_stmt`
stmt_list: `simple_stmt` (";" `simple_stmt`)* [";"] stmt_list: `simple_stmt` (";" `simple_stmt`)* [";"]
@ -400,9 +401,10 @@ A function definition defines a user-defined function object (see section
:ref:`types`): :ref:`types`):
.. productionlist:: .. productionlist::
funcdef: [`decorators`] "def" `funcname` "(" [`parameter_list`] ")" ":" `suite` decorated: decorators (classdef | funcdef)
decorators: `decorator`+ decorators: `decorator`+
decorator: "@" `dotted_name` ["(" [`argument_list` [","]] ")"] NEWLINE decorator: "@" `dotted_name` ["(" [`argument_list` [","]] ")"] NEWLINE
funcdef: "def" `funcname` "(" [`parameter_list`] ")" ":" `suite`
dotted_name: `identifier` ("." `identifier`)* dotted_name: `identifier` ("." `identifier`)*
parameter_list: (`defparameter` ",")* parameter_list: (`defparameter` ",")*
: ( "*" `identifier` [, "**" `identifier`] : ( "*" `identifier` [, "**" `identifier`]
@ -529,6 +531,11 @@ mutable values there can lead to unexpected results. For :term:`new-style
class`\es, descriptors can be used to create instance variables with different class`\es, descriptors can be used to create instance variables with different
implementation details. implementation details.
Class definitions, like function definitions, may be wrapped by one or
more :term:`decorator` expressions. The evaluation rules for the
decorator expressions are the same as for functions. The result must
be a class object, which is then bound to the class name.
.. rubric:: Footnotes .. rubric:: Footnotes
.. [#] The exception is propagated to the invocation stack only if there is no .. [#] The exception is propagated to the invocation stack only if there is no