diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/doc/extend.texi | 11 |
2 files changed, 14 insertions, 4 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d9227f0..2b3db63 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -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. diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 4bf39ca..0e76b6b 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -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 |