Mirror of roytam1's UXP fork just in case Moonchild and Tobin decide to go after him
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#define MOZ_MUST_USE_TYPE __attribute__((annotate("moz_must_use_type")))
#define MOZ_STACK_CLASS __attribute__((annotate("moz_stack_class")))
class MOZ_MUST_USE_TYPE MOZ_STACK_CLASS TestClass {};
TestClass foo; // expected-error {{variable of type 'TestClass' only valid on the stack}} expected-note {{value incorrectly allocated in a global variable}}
TestClass f()
{
TestClass bar;
return bar;
}
void g()
{
f(); // expected-error {{Unused value of must-use type 'TestClass'}}
}