/
override.il
99 lines (83 loc) · 1.82 KB
/
override.il
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.assembly extern mscorlib { }
.assembly override { }
.module override.exe
.class public A
{
.method public specialname void .ctor()
{
ldarg.0
call instance void [mscorlib]System.Object::.ctor()
ret
}
.method public void Foo()
{
ldstr "A::Foo"
call void [mscorlib]System.Console::WriteLine(string)
ret
}
.method public virtual void Bar()
{
ldstr "A::Bar"
call void [mscorlib]System.Console::WriteLine(string)
ret
}
.method public virtual void Baz()
{
ldstr "A::Baz"
call void [mscorlib]System.Console::WriteLine(string)
ret
}
}
.class public B extends A
{
.method public specialname void .ctor()
{
ldarg.0
call instance void A::.ctor()
ret
}
.method public void Foo()
{
ldstr "B::Foo"
call void [mscorlib]System.Console::WriteLine(string)
ret
}
.method public virtual void BarBaz()
{
.override A::Bar
.override A::Baz
ldstr "B::BarBaz"
call void [mscorlib]System.Console::WriteLine(string)
ret
}
}
.class public C extends B
{
.method public specialname void .ctor()
{
ldarg.0
call instance void B::.ctor()
ret
}
// no overrides, let's inherit everything from B
}
.method public static void Exec()
{
.entrypoint
newobj instance void B::.ctor() // create instance of derived class
castclass class A // cast it to base class
dup // we need 3 instance pointers
dup // on stack for 3 calls
call instance void A::Foo()
callvirt instance void A::Bar()
callvirt instance void A::Baz()
//-------------------------------------------------------------------
newobj instance void C::.ctor() // create instance of derived class
castclass class A // cast it to "grandparent"
dup // we need 3 instance pointers
dup // on stack for 3 calls
call instance void A::Foo()
callvirt instance void A::Bar()
callvirt instance void A::Baz()
ret
}