X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=lib%2Fmstch%2Fvisitor%2Fhas_token.hpp;fp=lib%2Fmstch%2Fvisitor%2Fhas_token.hpp;h=5ab30d46b62f7d746055a6a94aa9fe8924ee8c7f;hb=2e142df11d6f312a2a2b5097b8da73571ed523e8;hp=0000000000000000000000000000000000000000;hpb=61b3659afe961ed248f30e26f9ca8f28fcfafddc;p=cpPlugins.git

diff --git a/lib/mstch/visitor/has_token.hpp b/lib/mstch/visitor/has_token.hpp
new file mode 100644
index 0000000..5ab30d4
--- /dev/null
+++ b/lib/mstch/visitor/has_token.hpp
@@ -0,0 +1,31 @@
+#pragma once
+
+#include <boost/variant/static_visitor.hpp>
+
+#include "mstch/mstch.hpp"
+
+namespace mstch {
+
+class has_token: public boost::static_visitor<bool> {
+ public:
+  has_token(const std::string& token): m_token(token) {
+  }
+
+  template<class T>
+  bool operator()(const T&) const {
+    return m_token == ".";
+  }
+
+  bool operator()(const map& map) const {
+    return map.count(m_token) == 1;
+  }
+
+  bool operator()(const std::shared_ptr<object>& object) const {
+    return object->has(m_token);
+  }
+
+ private:
+  const std::string& m_token;
+};
+
+}