42 lines
706 B
C++
42 lines
706 B
C++
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#pragma once
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#include <boost/variant/static_visitor.hpp>
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#include "mstch/mstch.hpp"
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namespace mstch {
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class is_node_empty: public boost::static_visitor<bool> {
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public:
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template<class T>
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bool operator()(const T&) const {
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return false;
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}
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bool operator()(const std::nullptr_t&) const {
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return true;
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}
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bool operator()(const int& value) const {
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return value == 0;
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}
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bool operator()(const double& value) const {
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return value == 0;
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}
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bool operator()(const bool& value) const {
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return !value;
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}
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bool operator()(const std::string& value) const {
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return value == "";
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}
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bool operator()(const array& array) const {
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return array.size() == 0;
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}
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};
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}
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