298 lines
10 KiB
C++
298 lines
10 KiB
C++
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// RUN: %clang_cc1 -fsyntax-only -verify %s
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// RUN: %clang_cc1 -fsyntax-only -verify %s -fdelayed-template-parsing -DDELAYED_TEMPLATE_PARSING
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// RUN: %clang_cc1 -fsyntax-only -verify -std=gnu++1z %s
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// Errors
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export class foo { }; // expected-error {{expected template}}
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template x; // expected-error {{C++ requires a type specifier for all declarations}} \
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// expected-error {{does not refer}}
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export template x; // expected-error {{expected '<' after 'template'}}
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export template<class T> class x0; // expected-warning {{exported templates are unsupported}}
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template < ; // expected-error {{expected template parameter}} \
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// expected-error{{expected ',' or '>' in template-parameter-list}} \
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// expected-error {{declaration does not declare anything}}
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template <int +> struct x1; // expected-error {{expected ',' or '>' in template-parameter-list}}
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// verifies that we only walk to the ',' & still produce errors on the rest of the template parameters
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template <int +, T> struct x2; // expected-error {{expected ',' or '>' in template-parameter-list}} \
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expected-error {{expected unqualified-id}}
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template<template<int+>> struct x3; // expected-error {{expected ',' or '>' in template-parameter-list}} \
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expected-error {{template template parameter requires 'class' after the parameter list}}
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template <template X> struct Err1; // expected-error {{expected '<' after 'template'}} \
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// expected-error{{extraneous}}
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template <template <typename> > struct Err2; // expected-error {{template template parameter requires 'class' after the parameter list}}
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template <template <typename> Foo> struct Err3; // expected-error {{template template parameter requires 'class' after the parameter list}}
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template <template <typename> typename Foo> struct Cxx1z;
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#if __cplusplus <= 201402L
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// expected-warning@-2 {{extension}}
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#endif
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// Template function declarations
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template <typename T> void foo();
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template <typename T, typename U> void foo();
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// Template function definitions.
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template <typename T> void foo() { }
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// Template class (forward) declarations
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template <typename T> struct A;
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template <typename T, typename U> struct b;
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template <typename> struct C;
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template <typename, typename> struct D;
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// Forward declarations with default parameters?
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template <typename T = int> class X1;
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template <typename = int> class X2;
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// Forward declarations w/template template parameters
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template <template <typename> class T> class TTP1;
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template <template <typename> class> class TTP2;
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template <template <typename> class T = foo> class TTP3; // expected-error{{must be a class template}}
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template <template <typename> class = foo> class TTP3; // expected-error{{must be a class template}}
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template <template <typename X, typename Y> class T> class TTP5;
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// Forward declarations with non-type params
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template <int> class NTP0;
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template <int N> class NTP1;
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template <int N = 5> class NTP2;
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template <int = 10> class NTP3;
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template <unsigned int N = 12u> class NTP4;
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template <unsigned int = 12u> class NTP5;
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template <unsigned = 15u> class NTP6;
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template <typename T, T Obj> class NTP7;
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// Template class declarations
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template <typename T> struct A { };
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template <typename T, typename U> struct B { };
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// Template parameter shadowing
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template<typename T, // expected-note{{template parameter is declared here}}
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typename T> // expected-error{{declaration of 'T' shadows template parameter}}
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void shadow1();
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template<typename T> // expected-note{{template parameter is declared here}}
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void shadow2(int T); // expected-error{{declaration of 'T' shadows template parameter}}
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template<typename T> // expected-note{{template parameter is declared here}}
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class T { // expected-error{{declaration of 'T' shadows template parameter}}
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};
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template<int Size> // expected-note{{template parameter is declared here}}
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void shadow3(int Size); // expected-error{{declaration of 'Size' shadows template parameter}}
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// <rdar://problem/6952203>
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template<typename T> // expected-note{{here}}
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struct shadow4 {
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int T; // expected-error{{shadows}}
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};
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template<typename T> // expected-note{{here}}
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struct shadow5 {
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int T(int, float); // expected-error{{shadows}}
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};
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template<typename T, // expected-note{{template parameter is declared here}}
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T T> // expected-error{{declaration of 'T' shadows template parameter}}
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void shadow6();
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template<typename T, // expected-note{{template parameter is declared here}}
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template<typename> class T> // expected-error{{declaration of 'T' shadows template parameter}}
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void shadow7();
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// PR8302
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template<template<typename> class T> struct shadow8 { // expected-note{{template parameter is declared here}}
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template<template<typename> class T> struct inner; // expected-error{{declaration of 'T' shadows template parameter}}
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};
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// Non-type template parameters in scope
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template<int Size>
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void f(int& i) {
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i = Size;
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#ifdef DELAYED_TEMPLATE_PARSING
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Size = i;
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#else
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Size = i; // expected-error{{expression is not assignable}}
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#endif
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}
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template<typename T>
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const T& min(const T&, const T&);
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void f2() {
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int x;
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A< typeof(x>1) > a;
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}
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// PR3844
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template <> struct S<int> { }; // expected-error{{explicit specialization of undeclared template struct 'S'}}
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template <> union U<int> { }; // expected-error{{explicit specialization of undeclared template union 'U'}}
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struct SS;
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union UU;
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template <> struct SS<int> { }; // expected-error{{explicit specialization of non-template struct 'SS'}}
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template <> union UU<int> { }; // expected-error{{explicit specialization of non-template union 'UU'}}
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namespace PR6184 {
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namespace N {
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template <typename T>
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void bar(typename T::x);
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}
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template <typename T>
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void N::bar(typename T::x) { }
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}
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// This PR occurred only in template parsing mode.
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namespace PR17637 {
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template <int>
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struct L {
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template <typename T>
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struct O {
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template <typename U>
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static void Fun(U);
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};
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};
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template <int k>
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template <typename T>
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template <typename U>
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void L<k>::O<T>::Fun(U) {}
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void Instantiate() { L<0>::O<int>::Fun(0); }
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}
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namespace explicit_partial_specializations {
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typedef char (&oneT)[1];
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typedef char (&twoT)[2];
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typedef char (&threeT)[3];
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typedef char (&fourT)[4];
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typedef char (&fiveT)[5];
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typedef char (&sixT)[6];
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char one[1];
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char two[2];
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char three[3];
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char four[4];
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char five[5];
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char six[6];
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template<bool b> struct bool_ { typedef int type; };
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template<> struct bool_<false> { };
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#define XCAT(x,y) x ## y
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#define CAT(x,y) XCAT(x,y)
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#define sassert(_b_) bool_<(_b_)>::type CAT(var, __LINE__);
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template <int>
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struct L {
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template <typename T>
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struct O {
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template <typename U>
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static oneT Fun(U);
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};
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};
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template <int k>
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template <typename T>
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template <typename U>
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oneT L<k>::O<T>::Fun(U) { return one; }
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template<>
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template<>
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template<typename U>
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oneT L<0>::O<char>::Fun(U) { return one; }
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void Instantiate() {
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sassert(sizeof(L<0>::O<int>::Fun(0)) == sizeof(one));
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sassert(sizeof(L<0>::O<char>::Fun(0)) == sizeof(one));
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}
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}
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namespace func_tmpl_spec_def_in_func {
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// We failed to diagnose function template specialization definitions inside
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// functions during recovery previously.
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template <class> void FuncTemplate() {}
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void TopLevelFunc() {
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// expected-error@+2 {{expected a qualified name after 'typename'}}
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// expected-error@+1 {{function definition is not allowed here}}
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typename template <> void FuncTemplate<void>() { }
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// expected-error@+1 {{function definition is not allowed here}}
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void NonTemplateInner() { }
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}
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}
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namespace broken_baseclause {
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template<typename T>
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struct base { };
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struct t1 : base<int, // expected-note {{to match this '<'}}
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public: // expected-error {{expected expression}} expected-error {{expected '>'}}
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};
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// expected-error@-1 {{expected '{' after base class list}}
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struct t2 : base<int, // expected-note {{to match this '<'}}
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public // expected-error {{expected expression}} expected-error {{expected '>'}}
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};
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// expected-error@-1 {{expected '{' after base class list}}
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}
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namespace class_scope_instantiation {
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struct A {
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template<typename T> void f(T);
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template void f<int>(int); // expected-error {{expected '<' after 'template'}}
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template void f(float); // expected-error {{expected '<' after 'template'}}
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extern template // expected-error {{expected member name or ';'}}
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void f(double);
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};
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}
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namespace PR42071 {
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template<int SomeTemplateName<void>> struct A; // expected-error {{parameter name cannot have template arguments}}
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template<int operator+> struct B; // expected-error {{'operator+' cannot be the name of a parameter}}
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struct Q {};
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template<int Q::N> struct C; // expected-error {{parameter declarator cannot be qualified}}
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template<int f(int a = 0)> struct D; // expected-error {{default arguments can only be specified for parameters in a function declaration}}
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}
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namespace AnnotateAfterInvalidTemplateId {
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template<int I, int J> struct A { };
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template<int J> struct A<0, J> { }; // expected-note {{J = 0}}
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template<int I> struct A<I, 0> { }; // expected-note {{I = 0}}
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void f() { A<0, 0>::f(); } // expected-error {{ambiguous partial specializations}}
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}
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namespace PR45063 {
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template<class=class a::template b<>> struct X {}; // expected-error {{undeclared identifier 'a'}}
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}
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namespace NoCrashOnEmptyNestedNameSpecifier {
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template <typename FnT,
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typename T = typename ABC<FnT>::template arg_t<0>> // expected-error {{no template named 'ABC'}}
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void foo(FnT) {}
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}
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namespace PR45239 {
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// Ensure we don't crash here. We used to deallocate the TemplateIdAnnotation
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// before we'd parsed it.
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template<int> int b;
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template<int> auto f() -> b<0>; // expected-error +{{}}
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}
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namespace PR46231 {
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template; // expected-error {{declaration does not declare anything}}
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template<>; // expected-error {{declaration does not declare anything}}
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template<int>; // expected-error {{declaration does not declare anything}}
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template int; // expected-error {{declaration does not declare anything}}
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template<> int; // expected-error {{declaration does not declare anything}}
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template<int> int; // expected-error {{declaration does not declare anything}}
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}
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