cxx98-compat.cpp revision 841804baff6ea8ba1904a2ba81265aae1479e882 
1// RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wc++98-compat -verify %s
2
3template<typename ...T>  // expected-warning {{variadic templates are incompatible with C++98}}
4class Variadic1 {};
5
6template<template<typename> class ...T>  // expected-warning {{variadic templates are incompatible with C++98}}
7class Variadic2 {};
8
9template<int ...I>  // expected-warning {{variadic templates are incompatible with C++98}}
10class Variadic3 {};
11
12int alignas(8) with_alignas; // expected-warning {{'alignas' is incompatible with C++98}}
13int with_attribute [[ ]]; // expected-warning {{attributes are incompatible with C++98}}
14
15void Literals() {
16  (void)u8"str"; // expected-warning {{unicode literals are incompatible with C++98}}
17  (void)u"str"; // expected-warning {{unicode literals are incompatible with C++98}}
18  (void)U"str"; // expected-warning {{unicode literals are incompatible with C++98}}
19  (void)u'x'; // expected-warning {{unicode literals are incompatible with C++98}}
20  (void)U'x'; // expected-warning {{unicode literals are incompatible with C++98}}
21
22  (void)u8R"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
23  (void)uR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
24  (void)UR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
25  (void)R"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
26  (void)LR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
27}
28
29template<typename T> struct S {};
30namespace TemplateParsing {
31  S<::S<void> > s; // expected-warning {{'<::' is treated as digraph '<:' (aka '[') followed by ':' in C++98}}
32  S< ::S<void>> t; // expected-warning {{consecutive right angle brackets are incompatible with C++98 (use '> >')}}
33}
34
35void Lambda() {
36  []{}; // expected-warning {{lambda expressions are incompatible with C++98}}
37}
38
39int InitList() {
40  (void)new int {}; // expected-warning {{generalized initializer lists are incompatible with C++98}}
41  (void)int{}; // expected-warning {{generalized initializer lists are incompatible with C++98}}
42  int x {}; // expected-warning {{generalized initializer lists are incompatible with C++98}}
43  return {}; // expected-warning {{generalized initializer lists are incompatible with C++98}}
44}
45
46int operator""_hello(const char *); // expected-warning {{literal operators are incompatible with C++98}}
47
48enum EnumFixed : int { // expected-warning {{enumeration types with a fixed underlying type are incompatible with C++98}}
49};
50
51enum class EnumScoped { // expected-warning {{scoped enumerations are incompatible with C++98}}
52};
53
54void Deleted() = delete; // expected-warning {{deleted function definitions are incompatible with C++98}}
55struct Defaulted {
56  Defaulted() = default; // expected-warning {{defaulted function definitions are incompatible with C++98}}
57};
58
59int &&RvalueReference = 0; // expected-warning {{rvalue references are incompatible with C++98}}
60struct RefQualifier {
61  void f() &; // expected-warning {{reference qualifiers on functions are incompatible with C++98}}
62};
63
64auto f() -> int; // expected-warning {{trailing return types are incompatible with C++98}}
65
66void RangeFor() {
67  int xs[] = {1, 2, 3};
68  for (int &a : xs) { // expected-warning {{range-based for loop is incompatible with C++98}}
69  }
70}
71
72struct InClassInit {
73  int n = 0; // expected-warning {{in-class initialization of non-static data members is incompatible with C++98}}
74};
75
76struct OverrideControlBase {
77  virtual void f();
78  virtual void g();
79};
80struct OverrideControl final : OverrideControlBase { // expected-warning {{'final' keyword is incompatible with C++98}}
81  virtual void f() override; // expected-warning {{'override' keyword is incompatible with C++98}}
82  virtual void g() final; // expected-warning {{'final' keyword is incompatible with C++98}}
83};
84
85using AliasDecl = int; // expected-warning {{alias declarations are incompatible with C++98}}
86template<typename T> using AliasTemplate = T; // expected-warning {{alias declarations are incompatible with C++98}}
87
88inline namespace N { // expected-warning {{inline namespaces are incompatible with C++98}}
89}
90
91auto auto_deduction = 0; // expected-warning {{'auto' type specifier is incompatible with C++98}}
92int *p = new auto(0); // expected-warning {{'auto' type specifier is incompatible with C++98}}
93
94const int align_of = alignof(int); // expected-warning {{alignof expressions are incompatible with C++98}}
95char16_t c16 = 0; // expected-warning {{'char16_t' type specifier is incompatible with C++98}}
96char32_t c32 = 0; // expected-warning {{'char32_t' type specifier is incompatible with C++98}}
97constexpr int const_expr = 0; // expected-warning {{'constexpr' specifier is incompatible with C++98}}
98decltype(const_expr) decl_type = 0; // expected-warning {{'decltype' type specifier is incompatible with C++98}}
99void no_except() noexcept; // expected-warning {{noexcept specifications are incompatible with C++98}}
100bool no_except_expr = noexcept(1 + 1); // expected-warning {{noexcept expressions are incompatible with C++98}}
101void *null = nullptr; // expected-warning {{'nullptr' is incompatible with C++98}}
102static_assert(true, "!"); // expected-warning {{static_assert declarations are incompatible with C++98}}
103