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extend.texi (Function Attributes): GNU C++ does now allow unused parameter decls.

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* doc/extend.texi (Function Attributes): GNU C++ does now allow
	unused parameter decls.
	(Attribute Syntax): GNU C++ does not allow label attributes to be
	after the ':'.

From-SVN: r69781
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Nathan Sidwell 2003-07-25 10:52:31 +00:00 committed by Nathan Sidwell
parent cd47580517
commit 50fc59e78b
2 changed files with 14 additions and 4 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2003-07-25 Nathan Sidwell <nathan@codesourcery.com>
* doc/extend.texi (Function Attributes): GNU C++ does now allow
unused parameter decls.
(Attribute Syntax): GNU C++ does not allow label attributes to be
after the ':'.
2003-07-25 Gabriel Dos Reis <gdr@integrable-solutions.net>
* objc/objc-act.c (objc_check_decl): Don't use xxx_with_decl.

11
gcc/doc/extend.texi
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@ -2268,8 +2268,7 @@ These attributes are not currently implemented for Objective-C@.
@item unused
This attribute, attached to a function, means that the function is meant
to be possibly unused. GCC will not produce a warning for this
function. GNU C++ does not currently support this attribute as
definitions without parameters are valid in C++.
function.
@cindex @code{used} attribute.
@item used
@ -2725,14 +2724,18 @@ with the list being a single string constant.
An @dfn{attribute specifier list} is a sequence of one or more attribute
specifiers, not separated by any other tokens.
An attribute specifier list may appear after the colon following a
In GNU C, an attribute specifier list may appear after the colon following a
label, other than a @code{case} or @code{default} label. The only
attribute it makes sense to use after a label is @code{unused}. This
feature is intended for code generated by programs which contains labels
that may be unused but which is compiled with @option{-Wall}. It would
not normally be appropriate to use in it human-written code, though it
could be useful in cases where the code that jumps to the label is
contained within an @code{#ifdef} conditional.
contained within an @code{#ifdef} conditional. GNU C++ does not permit
such placement of attribute lists, as it is permissible for a
declaration, which could begin with an attribute list, to be labelled in
C++. Declarations cannot be labelled in C90 or C99, so the ambiguity
does not arise there.
An attribute specifier list may appear as part of a @code{struct},
@code{union} or @code{enum} specifier. It may go either immediately