// DR 743: A type without linkage shall not be used as the type of a
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// DR 743: A type without linkage shall not be used as the type of a
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// variable or function with linkage, unless
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// variable or function with linkage, unless
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// o the variable or function has extern "C" linkage (7.5 [dcl.link]), or
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// o the variable or function has extern "C" linkage (7.5 [dcl.link]), or
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// o the variable or function is not used (3.2 [basic.def.odr]) or is
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// o the variable or function is not used (3.2 [basic.def.odr]) or is
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// defined in the same translation unit.
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// defined in the same translation unit.
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// { dg-options -std=c++0x }
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// { dg-options -std=c++0x }
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template struct B {
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template struct B {
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void g(T){}
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void g(T){}
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void h(T); // { dg-error "never defined" }
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void h(T); // { dg-error "never defined" }
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friend void i(B, T){}
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friend void i(B, T){}
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static T t1; // { dg-error "never defined" }
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static T t1; // { dg-error "never defined" }
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static T t2;
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static T t2;
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};
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};
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template T B::t2 = { };
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template T B::t2 = { };
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enum {} e1; // OK, defined
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enum {} e1; // OK, defined
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extern enum {} e2; // { dg-error "never defined" }
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extern enum {} e2; // { dg-error "never defined" }
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extern "C" enum {} e3; // OK, extern "C"
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extern "C" enum {} e3; // OK, extern "C"
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void f() {
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void f() {
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struct A { int x; }; // no linkage
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struct A { int x; }; // no linkage
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A a = {1};
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A a = {1};
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B ba; // declares B::g(A) and B::h(A)
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B ba; // declares B::g(A) and B::h(A)
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ba.t1 = a; // error, B::t never defined
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ba.t1 = a; // error, B::t never defined
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ba.t2 = a; // OK
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ba.t2 = a; // OK
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ba.g(a); // OK
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ba.g(a); // OK
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ba.h(a); // error, B::h never defined
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ba.h(a); // error, B::h never defined
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i(ba, a); // OK
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i(ba, a); // OK
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e1+e2+e3;
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e1+e2+e3;
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}
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}
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