39 lines
601 B
C++
39 lines
601 B
C++
#ifndef INVENTORY_CXX_SEMANTICS_HH_
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#define INVENTORY_CXX_SEMANTICS_HH_
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#include <cstddef>
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namespace inventory {
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namespace semantics {
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class non_constructible {
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non_constructible() {}
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};
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template<class Derived>
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class singleton {
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public:
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static Derived &instance() {
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if (s_instance == NULL)
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s_instance = new Derived;
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return *s_instance;
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}
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protected:
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singleton() {}
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private:
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static Derived *s_instance;
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};
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template<typename... Args>
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class visitor {
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public:
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virtual void apply(Args... args) = 0;
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};
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}
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}
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#include "cxx-semantics_impl.hh"
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#endif
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