Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/objc.dg/protocol-optional-1.m @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 04ced10e8804 |
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/* Contributed by Nicola Pero <nicola.pero@meta-innovation.com>, November 2010. */ /* { dg-do compile } */ #include <objc/objc.h> /* Test that @optional for @protocol works. */ @protocol MyProtocol + (int)classMethod; - (int)method; @optional + (int)optionalClassMethod; - (int)optionalMethod; @end @interface MyRootClass <MyProtocol> @end /* The implementation implements both the @required methods, but none of the @optional ones. There should be no warnings as the @optional methods are optional. ;-) */ @implementation MyRootClass + (int)classMethod { return 20; } - (int)method { return 11; } @end int function (id <MyProtocol> object1, MyRootClass *object2) { /* Test that there are no warnings if you try to use an @optional method with an object of the class. */ int i = 0; i += [object1 method]; i += [object2 method]; i += [MyRootClass classMethod]; i += [object1 optionalMethod]; i += [object2 optionalMethod]; i += [MyRootClass optionalClassMethod]; return i; }