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111
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1 // { dg-do compile }
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2
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3 // Copyright (C) 2001 Free Software Foundation, Inc.
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4 // Contributed by Nathan Sidwell 15 Dec 2001 <nathan@codesourcery.com>
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5
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6 // PR 2645
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7
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8 template <typename T>
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9 struct call_traits
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10 {
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11 public:
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12 typedef T type_less_spec;
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13 };
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14
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15 template <typename T>
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16 struct call_traits<T&>
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17 {
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18 typedef T type_more_spec;
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19 };
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20
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21
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22 int main()
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23 {
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24 int num;
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25
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26 // Two typedefs lead to the instant. of the less spec. ("wrong") template
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27 typedef int& r_type;
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28 typedef const r_type cr_type;
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29 call_traits<cr_type>::type_less_spec var = num; // { dg-error "" }
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30
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31 // The explicit type leads to the instantiation of the "correct" one
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32 call_traits<const int&>::type_more_spec var2 = num;
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33
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34 // As happen with a single typedef!
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35 typedef const int& std_cr_type;
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36 call_traits<std_cr_type>::type_more_spec var3 = num;
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37
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38
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39 // As happen, indeed, without the cv-qualifier
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40 call_traits<r_type>::type_more_spec var4;
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41 }
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