diff options
Diffstat (limited to 'libobjc/objc/runtime.h')
| -rw-r--r-- | libobjc/objc/runtime.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/libobjc/objc/runtime.h b/libobjc/objc/runtime.h index 551c348d307..6e1f1ec36e8 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 |