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111
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1 // P0138R2 - direct-list-initialization of enums
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2 // { dg-do compile { target c++11 } }
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3
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4 enum A { G = 26 };
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5 enum B : short {};
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6 enum class C {};
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7 enum struct D : long {};
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8 enum class E : unsigned char { e = 7 };
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9 struct S { operator C () { return C (s); } int s; } s;
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10 struct T { operator long () { return t; } long t; } t;
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11 struct V { E v; };
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12 long l;
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13 long long ll;
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14 short c;
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15 void bar (E);
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16
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17 void
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18 foo ()
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19 {
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20 A a1 { 5 }; // { dg-error "invalid conversion from 'int' to 'A'" }
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21 B b1 { 7 }; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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22 C c1 { s };
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23 D d1 { D(t) }; // { dg-error "invalid cast from type 'T' to type 'D'" }
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24 D d2 { t }; // { dg-error "cannot convert 'T' to 'D' in initialization" "" { target c++14_down } }
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25 // { dg-error "invalid cast from type 'T' to type 'D'" "" { target c++17 } .-1 }
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26 D d3 { 9 }; // { dg-error "cannot convert 'int' to 'D' in initialization" "" { target c++14_down } }
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27 D d4 { l }; // { dg-error "cannot convert 'long int' to 'D' in initialization" "" { target c++14_down } }
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28 D d5 { D(l) };
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29 D d6 { G }; // { dg-error "cannot convert 'A' to 'D' in initialization" "" { target c++14_down } }
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30 E e1 { 5 }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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31 E e2 { -1 }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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131
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32 // { dg-error "narrowing conversion of '-1' from 'int' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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33 E e3 { 5.0 }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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34 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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35 E e4 { 5.2 }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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36 // { dg-error "narrowing conversion of '5.\[0-9]*e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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37 B b2 = { 7 }; // { dg-error "invalid conversion from 'int' to 'B'" }
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38 C c2 = { C { 8 } }; // { dg-error "cannot convert 'int' to 'C' in initialization" "" { target c++14_down } }
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39
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40 D *d7 = new D { 9 }; // { dg-error "cannot convert \[^\n\r]* to 'D' in initialization" "" { target c++14_down } }
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41 E *e5 = new E { -4 }; // { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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131
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42 // { dg-error "narrowing conversion of '-4' from 'int' to 'unsigned char'" "" { target c++17 } .-1 }
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43 bar ({ 10 }); // { dg-error "cannot convert \[^\n\r]* to 'E'" }
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111
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44 bar (E { 9 }); // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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145
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45 V v1 = { { 11 } }; // { dg-error "cannot convert '<brace-enclosed initializer list>' to 'E' in initialization" }
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46 V v2 = { E { 12 } }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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47 V v3 = { E { 5.0 } }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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48 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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49 V v4 = { 13 }; // { dg-error "cannot convert 'int' to 'E' in initialization" }
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50 if (B b3 { 5 }) // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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51 ;
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52 if (B b4 { 4.0 }) // { dg-error "cannot convert 'double' to 'B' in initialization" "" { target c++14_down } }
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131
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53 ; // { dg-error "narrowing conversion of '4.0e.0' from 'double' to 'short int'" "" { target c++17 } .-1 }
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111
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54 C c3 { 8L }; // { dg-error "cannot convert 'long int' to 'C' in initialization" "" { target c++14_down } }
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55 B b4 {short (c + 5)}; // { dg-error "invalid conversion from 'short int' to 'B'" "" { target c++14_down } }
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56 B b5 {c + 5}; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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131
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57 // { dg-error "narrowing conversion of \[^\n\r]* from 'int' to 'short int'" "" { target c++17 } .-1 }
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111
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58 C c4 { ll }; // { dg-error "cannot convert 'long long int' to 'C' in initialization" "" { target c++14_down } }
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131
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59 // { dg-error "narrowing conversion of 'll' from 'long long int' to 'int'" "" { target c++17 } .-1 }
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111
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60 C c5 {short (c + 5)}; // { dg-error "cannot convert 'short int' to 'C' in initialization" "" { target c++14_down } }
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61 C c6 {c + 5}; // { dg-error "cannot convert 'int' to 'C' in initialization" "" { target c++14_down } }
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62 }
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63
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64 struct U
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65 {
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66 U () : e { 5 } {} // { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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67 U (int) : e { 5.0 } {}// { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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131
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68 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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69 U (float) : e({ 6 }) {}// { dg-error "list-initializer for non-class type must not be parenthesized" }
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70 // { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target *-*-* } .-1 }
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71 E e;
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72 };
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73
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74 struct W
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75 {
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76 A a { 5 }; // { dg-error "invalid conversion from 'int' to 'A'" }
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77 B b { 6 }; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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78 C c { 3.0f }; // { dg-error "cannot convert \[^\n\r]* to 'C' in initialization" "" { target c++14_down } }
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131
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79 // { dg-error "narrowing conversion of '3.0e.0f' from 'float' to 'int'" "" { target c++17 } .-1 }
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111
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80 D d = { 7 }; // { dg-error "cannot convert \[^\n\r]* to 'D' in initialization" }
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81 };
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82
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83 template <int N>
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84 void
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85 foo2 ()
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86 {
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87 A a1 { 5 }; // { dg-error "invalid conversion from 'int' to 'A'" }
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88 B b1 { 7 }; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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89 C c1 { s };
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90 D d1 { D(t) }; // { dg-error "invalid cast from type 'T' to type 'D'" }
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91 D d2 { t }; // { dg-error "cannot convert 'T' to 'D' in initialization" "" { target c++14_down } }
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92 // { dg-error "invalid cast from type 'T' to type 'D'" "" { target c++17 } .-1 }
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93 D d3 { 9 }; // { dg-error "cannot convert 'int' to 'D' in initialization" "" { target c++14_down } }
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94 D d4 { l }; // { dg-error "cannot convert 'long int' to 'D' in initialization" "" { target c++14_down } }
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95 D d5 { D(l) };
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96 D d6 { G }; // { dg-error "cannot convert 'A' to 'D' in initialization" "" { target c++14_down } }
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97 E e1 { 5 }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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98 E e2 { -1 }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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131
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99 // { dg-error "narrowing conversion of '-1' from 'int' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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100 E e3 { 5.0 }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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101 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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102 E e4 { 5.2 }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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103 // { dg-error "narrowing conversion of '5.\[0-9]*e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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104 B b2 = { 7 }; // { dg-error "invalid conversion from 'int' to 'B'" }
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105 C c2 = { C { 8 } }; // { dg-error "cannot convert 'int' to 'C' in initialization" "" { target c++14_down } }
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106 D *d7 = new D { 9 }; // { dg-error "cannot convert \[^\n\r]* to 'D' in initialization" "" { target c++14_down } }
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107 E *e5 = new E { -4 }; // { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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131
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108 // { dg-error "narrowing conversion of '-4' from 'int' to 'unsigned char'" "" { target c++17 } .-1 }
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109 bar ({ 10 }); // { dg-error "cannot convert \[^\n\r]* to 'E'" }
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111
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110 bar (E { 9 }); // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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111 V v1 = { { 11 } }; // { dg-error "cannot convert '<brace-enclosed initializer list>' to 'E' in initialization" }
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111
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112 V v2 = { E { 12 } }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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113 V v3 = { E { 5.0 } }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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114 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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115 V v4 = { 13 }; // { dg-error "cannot convert 'int' to 'E' in initialization" }
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116 if (B b3 { 5 }) // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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117 ;
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118 if (B b4 { 4.0 }) // { dg-error "cannot convert 'double' to 'B' in initialization" "" { target c++14_down } }
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131
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119 ; // { dg-error "narrowing conversion of '4.0e.0' from 'double' to 'short int'" "" { target c++17 } .-1 }
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111
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120 C c3 { 8L }; // { dg-error "cannot convert 'long int' to 'C' in initialization" "" { target c++14_down } }
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121 B b4 {short (c + 5)}; // { dg-error "invalid conversion from 'short int' to 'B'" "" { target c++14_down } }
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122 B b5 {c + 5}; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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131
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123 // { dg-error "narrowing conversion of \[^\n\r]* from 'int' to 'short int'" "" { target c++17 } .-1 }
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111
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124 C c4 { ll }; // { dg-error "cannot convert 'long long int' to 'C' in initialization" "" { target c++14_down } }
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131
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125 // { dg-error "narrowing conversion of 'll' from 'long long int' to 'int'" "" { target c++17 } .-1 }
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111
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126 C c5 {short (c + 5)}; // { dg-error "cannot convert 'short int' to 'C' in initialization" "" { target c++14_down } }
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127 C c6 {c + 5}; // { dg-error "cannot convert 'int' to 'C' in initialization" "" { target c++14_down } }
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128 }
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129
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130 template <int N>
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131 struct U2
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132 {
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133 U2 () : e { 5 } {} // { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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134 U2 (int) : e { 5.0 } {}// { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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131
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135 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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136 U2 (float) : e({ 6 }) {}
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137 E e;
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138 };
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139
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140 template <int N>
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141 struct W2
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142 {
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143 A a { 5 }; // { dg-error "invalid conversion from 'int' to 'A'" "" { target *-*-* } }
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144 B b { 6 }; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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145 C c { 3.0f }; // { dg-error "cannot convert \[^\n\r]* to 'C' in initialization" "" { target c++14_down } }
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131
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146 // { dg-error "narrowing conversion of '3.0e.0f' from 'float' to 'int'" "" { target c++17 } .-1 }
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111
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147 D d = { 7 }; // { dg-error "cannot convert \[^\n\r]* to 'D' in initialization" "" { target *-*-* } }
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148 };
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149
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150 template <typename H, typename I, typename J, typename K, typename L, typename M>
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151 void
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152 foo3 ()
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153 {
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154 void bar3 (L);
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155 H a1 { 5 }; // { dg-error "invalid conversion from 'int' to 'A'" }
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156 I b1 { 7 }; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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157 J c1 { s };
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158 K d1 { K(t) }; // { dg-error "invalid cast from type 'T' to type 'D'" }
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159 K d2 { t }; // { dg-error "cannot convert 'T' to 'D' in initialization" "" { target c++14_down } }
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160 // { dg-error "invalid cast from type 'T' to type 'D'" "" { target c++17 } .-1 }
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161 K d3 { 9 }; // { dg-error "cannot convert 'int' to 'D' in initialization" "" { target c++14_down } }
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162 K d4 { l }; // { dg-error "cannot convert 'long int' to 'D' in initialization" "" { target c++14_down } }
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163 K d5 { K(l) };
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164 K d6 { G }; // { dg-error "cannot convert 'A' to 'D' in initialization" "" { target c++14_down } }
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165 L e1 { 5 }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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166 L e2 { -1 }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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131
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167 // { dg-error "narrowing conversion of '-1' from 'int' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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168 L e3 { 5.0 }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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169 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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170 L e4 { 5.2 }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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171 // { dg-error "narrowing conversion of '5.\[0-9]*e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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172 I b2 = { 7 }; // { dg-error "invalid conversion from 'int' to 'B'" }
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173 J c2 = { J { 8 } }; // { dg-error "cannot convert 'int' to 'C' in initialization" "" { target c++14_down } }
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174 K *d7 = new K { 9 }; // { dg-error "cannot convert \[^\n\r]* to 'D' in initialization" "" { target c++14_down } }
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175 L *e5 = new L { -4 }; // { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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131
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176 // { dg-error "narrowing conversion of '-4' from 'int' to 'unsigned char'" "" { target c++17 } .-1 }
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177 bar3 ({ 10 }); // { dg-error "cannot convert \[^\n\r]* to 'E'" }
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111
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178 bar3 (E { 9 }); // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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145
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179 M v1 = { { 11 } }; // { dg-error "cannot convert '<brace-enclosed initializer list>' to 'E' in initialization" }
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111
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180 M v2 = { L { 12 } }; // { dg-error "cannot convert 'int' to 'E' in initialization" "" { target c++14_down } }
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181 M v3 = { L { 5.0 } }; // { dg-error "cannot convert 'double' to 'E' in initialization" "" { target c++14_down } }
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131
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182 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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183 M v4 = { 13 }; // { dg-error "cannot convert 'int' to 'E' in initialization" }
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184 if (I b3 { 5 }) // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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185 ;
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186 if (I b4 { 4.0 }) // { dg-error "cannot convert 'double' to 'B' in initialization" "" { target c++14_down } }
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131
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187 ; // { dg-error "narrowing conversion of '4.0e.0' from 'double' to 'short int'" "" { target c++17 } .-1 }
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111
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188 J c3 { 8L }; // { dg-error "cannot convert 'long int' to 'C' in initialization" "" { target c++14_down } }
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189 I b4 {short (c + 5)}; // { dg-error "invalid conversion from 'short int' to 'B'" "" { target c++14_down } }
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190 I b5 {c + 5}; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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131
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191 // { dg-error "narrowing conversion of \[^\n\r]* from 'int' to 'short int'" "" { target c++17 } .-1 }
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111
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192 J c4 { ll }; // { dg-error "cannot convert 'long long int' to 'C' in initialization" "" { target c++14_down } }
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131
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193 // { dg-error "narrowing conversion of 'll' from 'long long int' to 'int'" "" { target c++17 } .-1 }
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111
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194 J c5 {short (c + 5)}; // { dg-error "cannot convert 'short int' to 'C' in initialization" "" { target c++14_down } }
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195 J c6 {c + 5}; // { dg-error "cannot convert 'int' to 'C' in initialization" "" { target c++14_down } }
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196 }
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197
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198 template <typename L>
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199 struct U3
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200 {
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201 U3 () : e { 5 } {} // { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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202 U3 (int) : e { 5.0 } {}// { dg-error "cannot convert \[^\n\r]* to 'E' in initialization" "" { target c++14_down } }
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131
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203 // { dg-error "narrowing conversion of '5.0e.0' from 'double' to 'unsigned char'" "" { target c++17 } .-1 }
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111
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204 U3 (float) : e({ 6 }) {}
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205 L e;
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206 };
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207
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208 template <typename H, typename I, typename J, typename K>
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209 struct W3
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210 {
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211 H a { 5 }; // { dg-error "invalid conversion from 'int' to 'A'" "" { target *-*-* } }
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212 I b { 6 }; // { dg-error "invalid conversion from 'int' to 'B'" "" { target c++14_down } }
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213 J c { 3.0f }; // { dg-error "cannot convert \[^\n\r]* to 'C' in initialization" "" { target c++14_down } }
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131
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214 // { dg-error "narrowing conversion of '3.0e.0f' from 'float' to 'int'" "" { target c++17 } .-1 }
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111
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215 K d = { 7 }; // { dg-error "cannot convert \[^\n\r]* to 'D' in initialization" "" { target *-*-* } }
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216 };
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217
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218 void
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219 test ()
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220 {
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221 foo2<0> ();
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222 U2<0> u20;
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223 U2<1> u21 (5);
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224 W2<0> w2; // { dg-message "" }
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225 foo3<A, B, C, D, E, V> ();
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226 U3<E> u30;
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227 U3<E> u31 (5);
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228 W3<A, B, C, D> w3; // { dg-message "" }
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229 }
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