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// elementary tests with two named regions
#define A() 1
////////////////////////////////////////////////////////////////////////////////
#region region_A
// test, whether global macros are (in)visible here
#if defined(A)
#error "Macro 'A' shouldn't be visible here!"
#endif
#define B() 2
A() = A()
2 = B()
#endregion // region_A
////////////////////////////////////////////////////////////////////////////////
#region region_B
// test, whether global macros are (in)visible here
#if defined(A)
#error "Macro 'A' shouldn't be visible here!"
#endif
// test, whether macros from other scopes are (in)visible here
#if defined(B)
#error "Macro 'B' shouldn't be visible here!"
#endif
#define D() 4
A() = A()
B() = B()
4 = D()
#endregion // region_B
// test, whether macros, defined inside a scope are (in)visible here
#if defined(B)
#error "Macro 'B' shouldn't be visible here!"
#endif
1 = A()
B() = B()
D() = D()
////////////////////////////////////////////////////////////////////////////////
// the named region is extended here
#region region_A
// test, whether global macros are (in)visible here
#if defined(A)
#error "Macro 'A' shouldn't be visible here!"
#endif
#define C() 3
A() = A()
2 = B()
3 = C()
#endregion // region_A
// test, whether macros, defined inside a scope are (in)visible here
#if defined(C)
#error "Macro 'C' shouldn't be visible here!"
#endif
1 = A()
B() = B()
C() = C()
D() = D()
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