### Compilation failed:

error: 4: function 'testOut' never assigns a value to out parameter 'b'
void testOut(out float2 a, out float2 b, out float2 c)         { a = float2(1); }
                           ^^^^^^^^^^^^
error: 4: function 'testOut' never assigns a value to out parameter 'c'
void testOut(out float2 a, out float2 b, out float2 c)         { a = float2(1); }
                                         ^^^^^^^^^^^^
error: 8: function 'testSOut' never assigns a value to out parameter 'b'
void testSOut(out S a, out S b, out S c)         { a.value = float2(1); }
                       ^^^^^^^
error: 8: function 'testSOut' never assigns a value to out parameter 'c'
void testSOut(out S a, out S b, out S c)         { a.value = float2(1); }
                                ^^^^^^^
4 errors