forked from OSchip/llvm-project
148 lines
6.7 KiB
C++
148 lines
6.7 KiB
C++
// RUN: %clang_cc1 -verify -std=c++0x %s
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namespace RedeclAliasTypedef {
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template<typename U> using T = int;
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template<typename U> using T = int;
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template<typename U> using T = T<U>;
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}
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namespace IllegalTypeIds {
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template<typename U> using A = void(int n = 0); // expected-error {{default arguments can only be specified for parameters in a function declaration}}
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template<typename U> using B = inline void(int n); // expected-error {{type name does not allow function specifier}}
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template<typename U> using C = virtual void(int n); // expected-error {{type name does not allow function specifier}}
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template<typename U> using D = explicit void(int n); // expected-error {{type name does not allow function specifier}}
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template<typename U> using E = void(int n) throw(); // expected-error {{exception specifications are not allowed in type aliases}}
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// FIXME: this is illegal; we incorrectly accept it for typedefs too.
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template<typename U> using F = void(*)(int n) &&; // expected-err
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template<typename U> using G = __thread void(int n); // expected-error {{type name does not allow storage class to be specified}}
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template<typename U> using H = void(int n); // ok
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template<typename U> using I = void(int n) &&; // ok
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}
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namespace IllegalSyntax {
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template<typename Z> using ::T = void(int n); // expected-error {{name defined in alias declaration must be an identifier}}
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template<typename Z> using operator int = void(int n); // expected-error {{name defined in alias declaration must be an identifier}}
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template<typename Z> using typename U = void; // expected-error {{name defined in alias declaration must be an identifier}}
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template<typename Z> using typename ::V = void(int n); // expected-error {{name defined in alias declaration must be an identifier}}
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template<typename Z> using typename ::operator bool = void(int n); // expected-error {{name defined in alias declaration must be an identifier}}
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}
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namespace VariableLengthArrays {
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template<typename Z> using T = int[42]; // ok
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int n = 32;
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template<typename Z> using T = int[n]; // expected-error {{variable length array declaration not allowed at file scope}}
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const int m = 42;
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template<typename Z> using U = int[m]; // expected-note {{previous definition}}
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template<typename Z> using U = int[42]; // ok
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template<typename Z> using U = int; // expected-error {{type alias template redefinition with different types ('int' vs 'int [42]')}}
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}
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namespace RedeclFunc {
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int f(int, char**);
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template<typename Z> using T = int;
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T<char> f(int, char **); // ok
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}
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namespace LookupFilter {
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namespace N { template<typename U> using S = int; }
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using namespace N;
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template<typename U> using S = S<U>*; // ok
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}
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namespace InFunctions {
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template<typename...T> struct S0 {
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template<typename Z> using U = T*; // expected-error {{declaration type contains unexpanded parameter pack 'T'}}
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U<char> u;
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};
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template<typename Z> using T1 = int;
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template<typename Z> using T2 = int[-1]; // expected-error {{array size is negative}}
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template<typename...T> struct S3 { // expected-note {{template parameter is declared here}}
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template<typename Z> using T = int; // expected-error {{declaration of 'T' shadows template parameter}}
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};
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template<typename Z> using Z = Z;
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}
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namespace ClassNameRedecl {
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class C0 {
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// FIXME: this diagnostic is pretty poor
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template<typename U> using C0 = int; // expected-error {{name defined in alias declaration must be an identifier}}
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};
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class C1 {
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// FIXME: this diagnostic is pretty poor
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template<typename U> using C1 = C1; // expected-error {{name defined in alias declaration must be an identifier}}
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};
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class C2 {
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template<typename U> using C0 = C1; // ok
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};
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template<typename...T> class C3 {
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template<typename U> using f = T; // expected-error {{declaration type contains unexpanded parameter pack 'T'}}
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};
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template<typename T> class C4 { // expected-note {{template parameter is declared here}}
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template<typename U> using T = int; // expected-error {{declaration of 'T' shadows template parameter}}
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};
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class C5 {
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class c; // expected-note {{previous definition}}
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template<typename U> using c = int; // expected-error {{redefinition of 'c' as different kind of symbol}}
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class d; // expected-note {{previous definition}}
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template<typename U> using d = d; // expected-error {{redefinition of 'd' as different kind of symbol}}
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};
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class C6 {
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class c { template<typename U> using C6 = int; }; // ok
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};
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}
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class CtorDtorName {
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template<typename T> using X = CtorDtorName;
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X<int>(); // expected-error {{expected member name}}
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~X<int>(); // expected-error {{destructor cannot be declared using a type alias}}
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};
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namespace TagName {
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template<typename Z> using S = struct { int n; }; // expected-error {{can not be defined}}
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template<typename Z> using T = class { int n; }; // expected-error {{can not be defined}}
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template<typename Z> using U = enum { a, b, c }; // expected-error {{can not be defined}}
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template<typename Z> using V = struct V { int n; }; // expected-error {{redefinition of 'V' as different kind of symbol}} \
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expected-error {{'TagName::V' can not be defined in a type alias template}} \
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expected-note {{previous definition is here}}
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}
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namespace StdExample {
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template<typename T, typename U> struct pair;
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template<typename T> using handler_t = void (*)(T);
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extern handler_t<int> ignore;
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extern void (*ignore)(int);
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// FIXME: we recover as if cell is an undeclared variable. the diagnostics are terrible!
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template<typename T> using cell = pair<T*, cell<T>*>; // expected-error {{use of undeclared identifier 'cell'}} \
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expected-error {{'T' does not refer to a value}} \
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expected-note {{declared here}} \
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expected-error {{expected ';' after alias declaration}}
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}
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namespace Access {
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class C0 {
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template<typename Z> using U = int; // expected-note {{declared private here}}
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};
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C0::U<int> v; // expected-error {{'U' is a private member}}
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class C1 {
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public:
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template<typename Z> using U = int;
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};
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C1::U<int> w; // ok
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}
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namespace VoidArg {
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template<typename Z> using V = void;
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V<int> f(int); // ok
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V<char> g(V<double>); // expected-error {{empty parameter list defined with a type alias of 'void' not allowed}}
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}
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namespace Curried {
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template<typename T, typename U> struct S;
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template<typename T> template<typename U> using SS = S<T, U>; // expected-error {{extraneous template parameter list in alias template declaration}}
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}
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