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class S
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{
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int (&fnref0)(double);
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// distinct kinds
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int* &fnref1;
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int &fnref2;
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};
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void foo(S& s)
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{
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}
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typedef void(&callback)(int);
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callback fn0(void)
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{
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}
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int(&fn1(void))(int)
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{
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}
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void fn2(callback c)
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{
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}
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