1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // <ratio> 10 // 11 // [ratio.general]/2 12 // Throughout subclause [ratio], the names of template parameters are 13 // used to express type requirements. If a template parameter is named 14 // R1 or R2, and the template argument is not a specialization of the 15 // ratio template, the program is ill-formed. 16 17 #include <ratio> 18 19 struct invalid { 20 static const int num = 1; 21 static const int den = 1; 22 }; 23 24 using valid = std::ratio<1, 1>; 25 26 namespace add { 27 using valid_valid = std::ratio_add<valid, valid>::type; 28 using invalid_valid = 29 std::ratio_add<invalid, valid>::type; // expected-error@*:* {{R1 to be a specialisation of the ratio template}} 30 using valid_invalid = 31 std::ratio_add<valid, invalid>::type; // expected-error@*:* {{R2 to be a specialisation of the ratio template}} 32 } // namespace add 33 34 namespace subtract { 35 using valid_valid = std::ratio_subtract<valid, valid>::type; 36 using invalid_valid = 37 std::ratio_subtract<invalid, valid>::type; // expected-error@*:* {{R1 to be a specialisation of the ratio template}} 38 using valid_invalid = 39 std::ratio_subtract<valid, invalid>::type; // expected-error@*:* {{R2 to be a specialisation of the ratio template}} 40 } // namespace subtract 41 42 namespace multiply { 43 using valid_valid = std::ratio_multiply<valid, valid>::type; 44 using invalid_valid = 45 std::ratio_multiply<invalid, valid>::type; // expected-error@*:* {{R1 to be a specialisation of the ratio template}} 46 using valid_invalid = 47 std::ratio_multiply<valid, invalid>::type; // expected-error@*:* {{R2 to be a specialisation of the ratio template}} 48 } // namespace multiply 49 50 namespace divide { 51 using valid_valid = std::ratio_divide<valid, valid>::type; 52 using invalid_valid = 53 std::ratio_divide<invalid, valid>::type; // expected-error@*:* {{R1 to be a specialisation of the ratio template}} 54 using valid_invalid = 55 std::ratio_divide<valid, invalid>::type; // expected-error@*:* {{R2 to be a specialisation of the ratio template}} 56 } // namespace divide 57