forked from OSchip/llvm-project
90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -fdiagnostics-show-option -verify %s
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// C++98 [basic.lookup.classref]p1:
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// In a class member access expression (5.2.5), if the . or -> token is
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// immediately followed by an identifier followed by a <, the identifier must
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// be looked up to determine whether the < is the beginning of a template
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// argument list (14.2) or a less-than operator. The identifier is first
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// looked up in the class of the object expression. If the identifier is not
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// found, it is then looked up in the context of the entire postfix-expression
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// and shall name a class or function template. If the lookup in the class of
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// the object expression finds a template, the name is also looked up in the
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// context of the entire postfix-expression and
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// -- if the name is not found, the name found in the class of the object
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// expression is used, otherwise
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// -- if the name is found in the context of the entire postfix-expression
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// and does not name a class template, the name found in the class of the
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// object expression is used, otherwise
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// -- if the name found is a class template, it must refer to the same
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// entity as the one found in the class of the object expression,
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// otherwise the program is ill-formed.
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// From PR 7247
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template<typename T>
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struct set{}; // expected-note{{lookup from the current scope refers here}}
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struct Value {
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template<typename T>
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void set(T value) {} // expected-note{{lookup in the object type 'Value' refers here}}
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void resolves_to_same() {
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Value v;
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v.set<double>(3.2);
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}
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};
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void resolves_to_different() {
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{
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Value v;
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// The fact that the next line is a warning rather than an error is an
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// extension.
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v.set<double>(3.2); // expected-warning{{lookup of 'set' in member access expression is ambiguous; using member of 'Value'}}
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}
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{
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int set; // Non-template.
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Value v;
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v.set<double>(3.2);
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}
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}
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namespace rdar9915664 {
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struct A {
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template<typename T> void a();
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};
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struct B : A { };
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struct C : A { };
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struct D : B, C {
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A &getA() { return static_cast<B&>(*this); }
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void test_a() {
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getA().a<int>();
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}
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};
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}
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namespace PR11856 {
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template<typename T> T end(T);
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template <typename T>
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void Foo() {
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T it1;
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if (it1->end < it1->end) {
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}
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}
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template<typename T> T *end(T*);
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class X { };
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template <typename T>
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void Foo2() {
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T it1;
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if (it1->end < it1->end) {
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}
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X *x;
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if (x->end < 7) { // expected-error{{no member named 'end' in 'PR11856::X'}}
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}
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}
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}
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