forked from OSchip/llvm-project
420 lines
20 KiB
C++
420 lines
20 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -std=c++11 -Wc++98-compat -verify %s
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// RUN: %clang_cc1 -fsyntax-only -std=c++14 -Wc++98-compat -verify %s -DCXX14COMPAT
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// RUN: %clang_cc1 -fsyntax-only -std=c++17 -Wc++98-compat -verify %s -DCXX14COMPAT -DCXX17COMPAT
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namespace std {
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struct type_info;
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using size_t = decltype(sizeof(0)); // expected-warning {{decltype}} expected-warning {{alias}}
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template<typename T> struct initializer_list {
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initializer_list(T*, size_t);
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T *p;
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size_t n;
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T *begin();
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T *end();
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};
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}
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template<typename ...T> // expected-warning {{variadic templates are incompatible with C++98}}
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class Variadic1 {};
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template<template<typename> class ...T> // expected-warning {{variadic templates are incompatible with C++98}}
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class Variadic2 {};
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template<int ...I> // expected-warning {{variadic templates are incompatible with C++98}}
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class Variadic3 {};
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alignas(8) int with_alignas; // expected-warning {{'alignas' is incompatible with C++98}}
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int with_attribute [[ ]]; // expected-warning {{C++11 attribute syntax is incompatible with C++98}}
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void Literals() {
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(void)u8"str"; // expected-warning {{unicode literals are incompatible with C++98}}
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(void)u"str"; // expected-warning {{unicode literals are incompatible with C++98}}
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(void)U"str"; // expected-warning {{unicode literals are incompatible with C++98}}
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(void)u'x'; // expected-warning {{unicode literals are incompatible with C++98}}
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(void)U'x'; // expected-warning {{unicode literals are incompatible with C++98}}
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(void)u8R"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
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(void)uR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
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(void)UR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
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(void)R"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
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(void)LR"X(str)X"; // expected-warning {{raw string literals are incompatible with C++98}}
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}
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template<typename T> struct S {};
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namespace TemplateParsing {
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S<::S<void> > s; // expected-warning {{'<::' is treated as digraph '<:' (aka '[') followed by ':' in C++98}}
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S< ::S<void>> t; // expected-warning {{consecutive right angle brackets are incompatible with C++98 (use '> >')}}
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}
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void Lambda() {
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[]{}(); // expected-warning {{lambda expressions are incompatible with C++98}}
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// Don't warn about implicit "-> auto" here.
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[](){}(); // expected-warning {{lambda expressions are incompatible with C++98}}
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}
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struct Ctor {
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Ctor(int, char);
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Ctor(double, long);
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};
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struct InitListCtor {
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InitListCtor(std::initializer_list<bool>);
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};
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int InitList(int i = {}) { // expected-warning {{generalized initializer lists are incompatible with C++98}} \
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// expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}}
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(void)new int {}; // expected-warning {{generalized initializer lists are incompatible with C++98}} \
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// expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}}
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(void)int{}; // expected-warning {{generalized initializer lists are incompatible with C++98}} \
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// expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}}
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int x { 0 }; // expected-warning {{generalized initializer lists are incompatible with C++98}}
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S<int> s = {}; // ok, aggregate
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s = {}; // expected-warning {{generalized initializer lists are incompatible with C++98}}
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std::initializer_list<int> xs = { 1, 2, 3 }; // expected-warning {{initialization of initializer_list object is incompatible with C++98}}
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auto ys = { 1, 2, 3 }; // expected-warning {{initialization of initializer_list object is incompatible with C++98}} \
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// expected-warning {{'auto' type specifier is incompatible with C++98}}
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Ctor c1 = { 1, 2 }; // expected-warning {{constructor call from initializer list is incompatible with C++98}}
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Ctor c2 = { 3.0, 4l }; // expected-warning {{constructor call from initializer list is incompatible with C++98}}
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InitListCtor ilc = { true, false }; // expected-warning {{initialization of initializer_list object is incompatible with C++98}}
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const int &r = { 0 }; // expected-warning {{reference initialized from initializer list is incompatible with C++98}}
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struct { int a; const int &r; } rr = { 0, {0} }; // expected-warning {{reference initialized from initializer list is incompatible with C++98}}
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return { 0 }; // expected-warning {{generalized initializer lists are incompatible with C++98}} expected-warning {{scalar}}
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}
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struct DelayedDefaultArgumentParseInitList {
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void f(int i = {1}) { // expected-warning {{generalized initializer lists are incompatible with C++98}} expected-warning {{scalar}}
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}
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};
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int operator"" _hello(const char *); // expected-warning {{literal operators are incompatible with C++98}}
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enum EnumFixed : int { // expected-warning {{enumeration types with a fixed underlying type are incompatible with C++98}}
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};
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enum class EnumScoped { // expected-warning {{scoped enumerations are incompatible with C++98}}
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};
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void Deleted() = delete; // expected-warning {{deleted function definitions are incompatible with C++98}}
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struct Defaulted {
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Defaulted() = default; // expected-warning {{defaulted function definitions are incompatible with C++98}}
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};
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int &&RvalueReference = 0; // expected-warning {{rvalue references are incompatible with C++98}}
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struct RefQualifier {
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void f() &; // expected-warning {{reference qualifiers on functions are incompatible with C++98}}
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};
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auto f() -> int; // expected-warning {{trailing return types are incompatible with C++98}}
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#ifdef CXX14COMPAT
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auto ff() { return 5; } // expected-warning {{'auto' type specifier is incompatible with C++98}}
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// expected-warning@-1 {{return type deduction is incompatible with C++ standards before C++14}}
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#endif
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void RangeFor() {
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int xs[] = {1, 2, 3};
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for (int &a : xs) { // expected-warning {{range-based for loop is incompatible with C++98}}
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}
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for (auto &b : {1, 2, 3}) {
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// expected-warning@-1 {{range-based for loop is incompatible with C++98}}
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// expected-warning@-2 {{'auto' type specifier is incompatible with C++98}}
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// expected-warning@-3 {{initialization of initializer_list object is incompatible with C++98}}
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// expected-warning@-4 {{reference initialized from initializer list is incompatible with C++98}}
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}
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struct Agg { int a, b; } const &agg = { 1, 2 }; // expected-warning {{reference initialized from initializer list is incompatible with C++98}}
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}
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struct InClassInit {
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int n = 0; // expected-warning {{in-class initialization of non-static data members is incompatible with C++98}}
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};
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struct OverrideControlBase {
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virtual void f();
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virtual void g();
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};
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struct OverrideControl final : OverrideControlBase { // expected-warning {{'final' keyword is incompatible with C++98}}
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virtual void f() override; // expected-warning {{'override' keyword is incompatible with C++98}}
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virtual void g() final; // expected-warning {{'final' keyword is incompatible with C++98}}
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};
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using AliasDecl = int; // expected-warning {{alias declarations are incompatible with C++98}}
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template<typename T> using AliasTemplate = T; // expected-warning {{alias declarations are incompatible with C++98}}
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inline namespace InlineNS { // expected-warning {{inline namespaces are incompatible with C++98}}
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}
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auto auto_deduction = 0; // expected-warning {{'auto' type specifier is incompatible with C++98}}
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int *p = new auto(0); // expected-warning {{'auto' type specifier is incompatible with C++98}}
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const int align_of = alignof(int); // expected-warning {{alignof expressions are incompatible with C++98}}
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char16_t c16 = 0; // expected-warning {{'char16_t' type specifier is incompatible with C++98}}
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char32_t c32 = 0; // expected-warning {{'char32_t' type specifier is incompatible with C++98}}
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constexpr int const_expr = 0; // expected-warning {{'constexpr' specifier is incompatible with C++98}}
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decltype(const_expr) decl_type = 0; // expected-warning {{'decltype' type specifier is incompatible with C++98}}
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__decltype(const_expr) decl_type2 = 0; // ok
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void no_except() noexcept; // expected-warning {{noexcept specifications are incompatible with C++98}}
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bool no_except_expr = noexcept(1 + 1); // expected-warning {{noexcept expressions are incompatible with C++98}}
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void *null = nullptr; // expected-warning {{'nullptr' is incompatible with C++98}}
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static_assert(true, "!"); // expected-warning {{static_assert declarations are incompatible with C++98}}
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struct InhCtorBase {
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InhCtorBase(int);
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};
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struct InhCtorDerived : InhCtorBase {
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using InhCtorBase::InhCtorBase; // expected-warning {{inheriting constructors are incompatible with C++98}}
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};
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struct FriendMember {
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static void MemberFn();
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friend void FriendMember::MemberFn(); // expected-warning {{friend declaration naming a member of the declaring class is incompatible with C++98}}
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};
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struct DelegCtor {
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DelegCtor(int) : DelegCtor() {} // expected-warning {{delegating constructors are incompatible with C++98}}
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DelegCtor();
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};
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template<int n = 0> void DefaultFuncTemplateArg(); // expected-warning {{default template arguments for a function template are incompatible with C++98}}
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template<typename T> int TemplateFn(T) { return 0; }
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void LocalTemplateArg() {
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struct S {};
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TemplateFn(S()); // expected-warning {{local type 'S' as template argument is incompatible with C++98}}
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}
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struct {} obj_of_unnamed_type; // expected-note {{here}}
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int UnnamedTemplateArg = TemplateFn(obj_of_unnamed_type); // expected-warning {{unnamed type as template argument is incompatible with C++98}}
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// FIXME: We do not implement C++98 compatibility warnings for the C++17
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// template argument evaluation rules.
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#ifndef CXX17COMPAT
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namespace RedundantParensInAddressTemplateParam {
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int n;
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template<int*p> struct S {};
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S<(&n)> s; // expected-warning {{redundant parentheses surrounding address non-type template argument are incompatible with C++98}}
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S<(((&n)))> t; // expected-warning {{redundant parentheses surrounding address non-type template argument are incompatible with C++98}}
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}
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#endif
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namespace TemplateSpecOutOfScopeNs {
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template<typename T> struct S {};
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}
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template<> struct TemplateSpecOutOfScopeNs::S<char> {};
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struct Typename {
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template<typename T> struct Inner {};
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};
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typename ::Typename TypenameOutsideTemplate(); // expected-warning {{use of 'typename' outside of a template is incompatible with C++98}}
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Typename::template Inner<int> TemplateOutsideTemplate(); // expected-warning {{use of 'template' keyword outside of a template is incompatible with C++98}}
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struct TrivialButNonPOD {
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int f(int);
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private:
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int k;
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};
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void Ellipsis(int n, ...);
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void TrivialButNonPODThroughEllipsis() {
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Ellipsis(1, TrivialButNonPOD()); // expected-warning {{passing object of trivial but non-POD type 'TrivialButNonPOD' through variadic function is incompatible with C++98}}
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}
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struct HasExplicitConversion {
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explicit operator bool(); // expected-warning {{explicit conversion functions are incompatible with C++98}}
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};
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struct Struct {};
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enum Enum { enum_val = 0 };
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struct BadFriends {
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friend enum ::Enum; // expected-warning {{befriending enumeration type 'enum ::Enum' is incompatible with C++98}}
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friend int; // expected-warning {{non-class friend type 'int' is incompatible with C++98}}
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friend Struct; // expected-warning {{befriending 'Struct' without 'struct' keyword is incompatible with C++98}}
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};
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int n = {}; // expected-warning {{scalar initialized from empty initializer list is incompatible with C++98}}
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class PrivateMember {
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struct ImPrivate {};
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};
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template<typename T> typename T::ImPrivate SFINAEAccessControl(T t) { // expected-warning {{substitution failure due to access control is incompatible with C++98}}
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return typename T::ImPrivate();
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}
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int SFINAEAccessControl(...) { return 0; }
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int CheckSFINAEAccessControl = SFINAEAccessControl(PrivateMember()); // expected-note {{while substituting deduced template arguments into function template 'SFINAEAccessControl' [with T = PrivateMember]}}
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namespace UnionOrAnonStructMembers {
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struct NonTrivCtor {
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NonTrivCtor(); // expected-note 2{{user-provided default constructor}}
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};
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struct NonTrivCopy {
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NonTrivCopy(const NonTrivCopy&); // expected-note 2{{user-provided copy constructor}}
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};
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struct NonTrivDtor {
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~NonTrivDtor(); // expected-note 2{{user-provided destructor}}
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};
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union BadUnion {
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NonTrivCtor ntc; // expected-warning {{union member 'ntc' with a non-trivial default constructor is incompatible with C++98}}
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NonTrivCopy ntcp; // expected-warning {{union member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}}
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NonTrivDtor ntd; // expected-warning {{union member 'ntd' with a non-trivial destructor is incompatible with C++98}}
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};
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struct Wrap {
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struct {
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NonTrivCtor ntc; // expected-warning {{anonymous struct member 'ntc' with a non-trivial default constructor is incompatible with C++98}}
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NonTrivCopy ntcp; // expected-warning {{anonymous struct member 'ntcp' with a non-trivial copy constructor is incompatible with C++98}}
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NonTrivDtor ntd; // expected-warning {{anonymous struct member 'ntd' with a non-trivial destructor is incompatible with C++98}}
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};
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};
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union WithStaticDataMember {
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static constexpr double d = 0.0; // expected-warning {{static data member 'd' in union is incompatible with C++98}} expected-warning {{'constexpr' specifier is incompatible with C++98}}
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static const int n = 0; // expected-warning {{static data member 'n' in union is incompatible with C++98}}
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static int k; // expected-warning {{static data member 'k' in union is incompatible with C++98}}
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};
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}
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int EnumNNS = Enum::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}}
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template<typename T> void EnumNNSFn() {
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int k = T::enum_val; // expected-warning {{enumeration type in nested name specifier is incompatible with C++98}}
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};
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template void EnumNNSFn<Enum>(); // expected-note {{in instantiation}}
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void JumpDiagnostics(int n) {
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goto DirectJump; // expected-warning {{jump from this goto statement to its label is incompatible with C++98}}
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TrivialButNonPOD tnp1; // expected-note {{jump bypasses initialization of non-POD variable}}
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DirectJump:
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void *Table[] = {&&DirectJump, &&Later};
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goto *Table[n]; // expected-warning {{jump from this indirect goto statement to one of its possible targets is incompatible with C++98}}
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TrivialButNonPOD tnp2; // expected-note {{jump bypasses initialization of non-POD variable}}
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Later: // expected-note {{possible target of indirect goto statement}}
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switch (n) {
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TrivialButNonPOD tnp3; // expected-note {{jump bypasses initialization of non-POD variable}}
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default: // expected-warning {{jump from switch statement to this case label is incompatible with C++98}}
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return;
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}
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}
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namespace UnevaluatedMemberAccess {
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struct S {
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int n;
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int f() { return sizeof(S::n); } // ok
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};
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int k = sizeof(S::n); // expected-warning {{use of non-static data member 'n' in an unevaluated context is incompatible with C++98}}
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const std::type_info &ti = typeid(S::n); // expected-warning {{use of non-static data member 'n' in an unevaluated context is incompatible with C++98}}
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}
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namespace LiteralUCNs {
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char c1 = '\u001e'; // expected-warning {{universal character name referring to a control character is incompatible with C++98}}
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wchar_t c2 = L'\u0041'; // expected-warning {{specifying character 'A' with a universal character name is incompatible with C++98}}
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const char *s1 = "foo\u0031"; // expected-warning {{specifying character '1' with a universal character name is incompatible with C++98}}
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const wchar_t *s2 = L"bar\u0085"; // expected-warning {{universal character name referring to a control character is incompatible with C++98}}
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}
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// FIXME: We do not implement C++98 compatibility warnings for the C++17
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// template argument evaluation rules.
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#ifndef CXX17COMPAT
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namespace NonTypeTemplateArgs {
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template<typename T, T v> struct S {};
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const int k = 5; // expected-note {{here}}
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static void f() {} // expected-note {{here}}
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S<const int&, k> s1; // expected-warning {{non-type template argument referring to object 'k' with internal linkage is incompatible with C++98}}
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S<void(&)(), f> s2; // expected-warning {{non-type template argument referring to function 'f' with internal linkage is incompatible with C++98}}
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}
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namespace NullPointerTemplateArg {
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struct A {};
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template<int*> struct X {};
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template<int A::*> struct Y {};
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X<(int*)0> x; // expected-warning {{use of null pointer as non-type template argument is incompatible with C++98}}
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Y<(int A::*)0> y; // expected-warning {{use of null pointer as non-type template argument is incompatible with C++98}}
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}
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#endif
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namespace PR13480 {
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struct basic_iterator {
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basic_iterator(const basic_iterator &it) {} // expected-note {{because type 'PR13480::basic_iterator' has a user-provided copy constructor}}
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basic_iterator(basic_iterator &it) {}
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};
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union test {
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basic_iterator it; // expected-warning {{union member 'it' with a non-trivial copy constructor is incompatible with C++98}}
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};
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}
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namespace AssignOpUnion {
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struct a {
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void operator=(const a &it) {} // expected-note {{because type 'AssignOpUnion::a' has a user-provided copy assignment operator}}
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void operator=(a &it) {}
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};
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struct b {
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void operator=(const b &it) {} // expected-note {{because type 'AssignOpUnion::b' has a user-provided copy assignment operator}}
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};
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union test1 {
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a x; // expected-warning {{union member 'x' with a non-trivial copy assignment operator is incompatible with C++98}}
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b y; // expected-warning {{union member 'y' with a non-trivial copy assignment operator is incompatible with C++98}}
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};
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}
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namespace rdar11736429 {
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struct X { // expected-note {{because type 'rdar11736429::X' has no default constructor}}
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X(const X&) = delete; // expected-warning{{deleted function definitions are incompatible with C++98}} \
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// expected-note {{implicit default constructor suppressed by user-declared constructor}}
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};
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union S {
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X x; // expected-warning{{union member 'x' with a non-trivial default constructor is incompatible with C++98}}
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};
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}
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template<typename T> T var = T(10);
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#ifdef CXX14COMPAT
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// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
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#else
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// expected-warning@-4 {{variable templates are a C++14 extension}}
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#endif
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// No diagnostic for specializations of variable templates; we will have
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// diagnosed the primary template.
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template<typename T> T* var<T*> = new T();
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template<> int var<int> = 10;
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template char var<char>;
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float fvar = var<float>;
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class A {
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template<typename T> static T var = T(10);
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#ifdef CXX14COMPAT
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// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
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#else
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// expected-warning@-4 {{variable templates are a C++14 extension}}
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#endif
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template<typename T> static T* var<T*> = new T();
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};
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struct B { template<typename T> static T v; };
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#ifdef CXX14COMPAT
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// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
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#else
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// expected-warning@-4 {{variable templates are a C++14 extension}}
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#endif
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template<typename T> T B::v = T();
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#ifdef CXX14COMPAT
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// expected-warning@-2 {{variable templates are incompatible with C++ standards before C++14}}
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#else
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// expected-warning@-4 {{variable templates are a C++14 extension}}
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#endif
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template<typename T> T* B::v<T*> = new T();
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template<> int B::v<int> = 10;
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template char B::v<char>;
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float fsvar = B::v<float>;
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#ifdef CXX14COMPAT
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int digit_seps = 123'456; // expected-warning {{digit separators are incompatible with C++ standards before C++14}}
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#endif
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#ifdef CXX17COMPAT
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template<class T> struct CTAD {};
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void ctad_test() {
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CTAD<int> s;
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CTAD t = s; // expected-warning {{class template argument deduction is incompatible with C++ standards before C++17}}
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}
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#endif
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