proto-lossage-[1-4].mm: New.

[gcc/testsuite/ChangeLog]
2005-06-23  Ziemowit Laski  <zlaski@apple.com>

        * obj-c++.dg/proto-lossage-[1-4].mm: New.

From-SVN: r101284

gcc/testsuite/ChangeLog

@@ -1,3 +1,7 @@
+2005-06-23  Ziemowit Laski  <zlaski@apple.com>
+
+	* obj-c++.dg/proto-lossage-[1-4].mm: New.
+
 2005-06-23  Ziemowit Laski  <zlaski@apple.com>
 
 	* obj-c++.dg/typedef-alias-1.mm: New.

gcc/testsuite/obj-c++.dg/proto-lossage-1.mm

@@ -0,0 +1,44 @@
+/* Test for situations in which protocol conformance information
+   may be lost, leading to superfluous warnings.  */
+/* Author: Ziemowit Laski <zlaski@apple.com>.  */
+/* { dg-do compile } */
+
+/* One-line substitute for objc/objc.h */
+typedef struct objc_object { struct objc_class *class_pointer; } *id;
+
+@protocol NSObject
+- (int)someValue;
+@end
+
+@interface NSObject <NSObject>
+@end
+
+@protocol PlateMethods
+- (void)someMethod;
+@end
+
+@interface Foo {
+  NSObject <PlateMethods> *plate;
+  id <PlateMethods> plate1;
+  NSObject *plate2;
+}
+- (id <PlateMethods>) getPlate;
+- (id <NSObject>) getPlate1;
+- (int) getValue;
+@end
+
+@implementation Foo
+- (id <PlateMethods>) getPlate {
+  return plate;  /* { dg-bogus "does not implement" } */
+}
+- (id <NSObject>) getPlate1 {
+  return (id <NSObject>)plate1; /* { dg-bogus "does not conform" } */
+}
+- (int) getValue {
+  int i = [plate1 someValue];   /* { dg-warning ".\\-someValue. not found in protocol\\(s\\)" } */
+
+  int j = [(id <NSObject>)plate1 someValue];  /* { dg-bogus "not found in protocol" } */
+  int k = [(id)plate1 someValue]; /* { dg-bogus "not found in protocol" } */
+  return i + j + k;
+}
+@end

gcc/testsuite/obj-c++.dg/proto-lossage-2.mm

@@ -0,0 +1,20 @@
+/* Don't forget to look in protocols if a class (and its superclasses) do not
+   provide a suitable method.  */
+/* { dg-do compile } */
+
+#include <objc/Object.h>
+
+@protocol Zot
+-(void) zot;
+@end
+
+@interface Foo : Object <Zot>
+@end
+
+int foo()
+{
+	Foo *f=nil;
+	[f zot]; /* There should be no warnings here! */
+	return 0;
+}
+

gcc/testsuite/obj-c++.dg/proto-lossage-3.mm

@@ -0,0 +1,25 @@
+/* Crash due to descriptionFor(Instance|Class)Method applied to
+   a protocol with no instance/class methods respectively.
+   Problem report and original fix by richard@brainstorm.co.uk.  */
+/* { dg-do run } */
+#include <objc/objc.h>
+#include <objc/Object.h>
+#include <objc/Protocol.h>
+
+@protocol NoInstanceMethods
++ testMethod;
+@end
+
+@protocol NoClassMethods
+- testMethod;
+@end
+
+int
+main()
+{
+[@protocol(NoInstanceMethods) descriptionForInstanceMethod: @selector(name)];
+[@protocol(NoInstanceMethods) descriptionForClassMethod: @selector(name)];
+[@protocol(NoClassMethods) descriptionForInstanceMethod: @selector(name)];
+[@protocol(NoClassMethods) descriptionForClassMethod: @selector(name)];
+return 0;
+}

gcc/testsuite/obj-c++.dg/proto-lossage-4.mm

@@ -0,0 +1,52 @@
+/* Test for situations in which protocol conformance information
+   may be lost while casting.  */
+/* Author: Ziemowit Laski <zlaski@apple.com>.  */
+/* { dg-do compile } */
+
+/* One-line substitute for objc/objc.h */
+typedef struct objc_object { struct objc_class *class_pointer; } *id;
+
+@protocol Proto
+- (long)someValue;
+@end
+
+@interface Obj
+- (long)anotherValue;
+@end
+
+long foo(void) {
+  long receiver = 2;
+  Obj *objrcvr;
+  Obj <Proto> *objrcvr2;
+
+  /* NB: Since 'receiver' is an invalid ObjC message receiver, the compiler
+     should warn but then search for methods as if we were messaging 'id'.  */
+
+  receiver += [receiver someValue]; /* { dg-warning "invalid receiver type .long int." } */
+  receiver += [receiver anotherValue]; /* { dg-warning "invalid receiver type .long int." } */
+
+  receiver += [(Obj *)receiver someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
+/* { dg-error "invalid conversion" "" { target *-*-* } 28 } */
+
+  receiver += [(Obj *)receiver anotherValue];
+  receiver += [(Obj <Proto> *)receiver someValue];
+  receiver += [(Obj <Proto> *)receiver anotherValue];
+  receiver += [objrcvr someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
+/* { dg-error "invalid conversion" "" { target *-*-* } 34 } */
+
+  receiver += [objrcvr anotherValue];
+  receiver += [(Obj <Proto> *)objrcvr someValue];
+  receiver += [(Obj <Proto> *)objrcvr anotherValue];
+  receiver += [objrcvr2 someValue];
+  receiver += [objrcvr2 anotherValue];
+  receiver += [(Obj *)objrcvr2 someValue]; /* { dg-warning ".Obj. may not respond to .\\-someValue." } */
+/* { dg-warning "invalid conversion" "" { target *-*-* } 42 } */
+
+  receiver += [(Obj *)objrcvr2 anotherValue];
+
+  return receiver;
+}
+
+/* { dg-warning "Messages without a matching method signature" "" { target *-*-* } 0 } */
+/* { dg-warning "will be assumed to return .id. and accept" "" { target *-*-* } 0 } */
+/* { dg-warning ".\.\.\.. as arguments" "" { target *-*-* } 0 } */