From 68ade9e4e84617fd5c613618cfdc0cc1fa6d6d81 Mon Sep 17 00:00:00 2001 From: Nicola Pero Date: Mon, 28 Feb 2011 14:48:23 +0000 Subject: In libobjc/: 2011-02-28 Nicola Pero In libobjc/: 2011-02-28 Nicola Pero * selector.c (sel_getTypedSelector): Return NULL if there are multiple selectors with conflicting types. * objc/runtime.h (sel_getTypedSelector): Updated documentation. In gcc/testsuite/: 2011-02-28 Nicola Pero * objc.dg/gnu-api-2-sel.m: Test that sel_getTypedSelector return NULL in case of a selector with conflicting types. * obj-c++.dg/gnu-api-2-sel.mm: Same change. From-SVN: r170563 --- libobjc/objc/runtime.h | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) (limited to 'libobjc/objc') diff --git a/libobjc/objc/runtime.h b/libobjc/objc/runtime.h index 551c348..6e1f1ec 100644 --- a/libobjc/objc/runtime.h +++ b/libobjc/objc/runtime.h @@ -226,14 +226,16 @@ objc_EXPORT SEL * sel_copyTypedSelectorList (const char *name, unsigned int *numberOfReturnedSelectors); /* Return a selector with name 'name' and a non-zero type encoding, if - any such selector is registered with the runtime. If there is no - such selector, NULL is returned. Return NULL if 'name' is NULL. + there is a single selector with a type, and with that name, + registered with the runtime. If there is no such selector, or if + there are multiple selectors with the same name but conflicting + types, NULL is returned. Return NULL if 'name' is NULL. This is useful if you have the name of the selector, and would really like to get a selector for it that includes the type encoding. Unfortunately, if the program contains multiple selector - with the same name but different types, sel_getTypedSelector - returns a random one of them, which may not be the right one. + with the same name but different types, sel_getTypedSelector can + not possibly know which one you need, and so will return NULL. Compatibility Note: the Apple/NeXT runtime has untyped selectors, so it does not have this function, which is specific to the GNU -- cgit v1.1