// checking for explicit member specialization /*************************************************************************** * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed * with this work for additional information regarding copyright * ownership. The ASF licenses this file to you under the Apache * License, Version 2.0 (the License); you may not use this file * except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or * implied. See the License for the specific language governing * permissions and limitations under the License. * * Copyright 1999-2007 Rogue Wave Software, Inc. * **************************************************************************/ struct A { int i_; // no default ctor declared to exercise the compiler's ability // distinguish between a declaration of an explicir member // specialization and a definition of the same (see below) A (int i): i_ (i) { } }; template struct B { int foo () { return a.i_; } int bar (); static A a; }; // declare explicit specialization of template members template <> inline int B::foo (); template <> int B::bar (); // make sure this is taken as a declaration and not a definition // as, for example, with SunPro 5.5 (see bug #411) template <> A B::a; // define explicit specialization of template members template <> inline int B::foo () { return 1; } template <> int B::bar () { return 1; } template <> A B::a (1); // define members of the primary template template int B::bar () { return foo (); } template A B::a (0); int main () { B bc; bc.foo (); bc.bar (); B bi; int status = 0; if (1 != bi.foo ()) status |= 1; if (1 != bi.bar ()) status |= 2; if (1 != bi.a.i_) status |= 4; return status; }