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#define MOZ_TEMPORARY_CLASS __attribute__((annotate("moz_temporary_class")))
#define MOZ_IMPLICIT __attribute__((annotate("moz_implicit")))
#include <stddef.h>
struct MOZ_TEMPORARY_CLASS Temporary {
int i;
Temporary() {}
MOZ_IMPLICIT Temporary(int a) {}
Temporary(int a, int b) {}
void *operator new(size_t x) throw() { return 0; }
void *operator new(size_t blah, char *buffer) { return buffer; }
};
template <class T>
struct MOZ_TEMPORARY_CLASS TemplateClass {
T i;
};
void gobble(void *) { }
void gobbleref(const Temporary&) { }
template <class T>
void gobbleanyref(const T&) { }
void misuseNonTemporaryClass(int len) {
// All of these should error.
Temporary invalid; // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in an automatic variable}}
Temporary alsoInvalid[2]; // expected-error-re {{variable of type 'Temporary{{ ?}}[2]' is only valid as a temporary}} expected-note {{value incorrectly allocated in an automatic variable}} expected-note-re {{'Temporary{{ ?}}[2]' is a temporary type because it is an array of temporary type 'Temporary'}}
static Temporary invalidStatic; // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in a global variable}}
static Temporary alsoInvalidStatic[2]; // expected-error-re {{variable of type 'Temporary{{ ?}}[2]' is only valid as a temporary}} expected-note {{value incorrectly allocated in a global variable}} expected-note-re {{'Temporary{{ ?}}[2]' is a temporary type because it is an array of temporary type 'Temporary'}}
gobble(&invalid);
gobble(&invalidStatic);
gobble(&alsoInvalid[0]);
// All of these should be fine.
gobbleref(Temporary());
gobbleref(Temporary(10, 20));
gobbleref(Temporary(10));
gobbleref(10);
gobbleanyref(TemplateClass<int>());
// All of these should error.
gobble(new Temporary); // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated on the heap}}
gobble(new Temporary[10]); // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated on the heap}}
gobble(new TemplateClass<int>); // expected-error {{variable of type 'TemplateClass<int>' is only valid as a temporary}} expected-note {{value incorrectly allocated on the heap}}
gobble(len <= 5 ? &invalid : new Temporary); // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated on the heap}}
// Placement new is odd, but okay.
char buffer[sizeof(Temporary)];
gobble(new (buffer) Temporary);
}
void defaultArg(const Temporary& arg = Temporary()) { // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in an automatic variable}}
}
// Can't be a global, this should error.
Temporary invalidStatic; // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in a global variable}}
struct RandomClass {
Temporary nonstaticMember; // This is okay if RandomClass is only used as a temporary.
static Temporary staticMember; // expected-error {{variable of type 'Temporary' is only valid as a temporary}} expected-note {{value incorrectly allocated in a global variable}}
};
struct BadInherit : Temporary {};
void useStuffWrongly() {
gobbleanyref(BadInherit());
gobbleanyref(RandomClass());
}