Added boost header

test/external/boost/numeric/interval/checking.hpp

@@ -0,0 +1,130 @@
+/* Boost interval/checking.hpp template implementation file
+ *
+ * Copyright 2002 Herv<72> Br<42>nnimann, Guillaume Melquiond, Sylvain Pion
+ *
+ * Distributed under the Boost Software License, Version 1.0.
+ * (See accompanying file LICENSE_1_0.txt or
+ * copy at http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+#ifndef BOOST_NUMERIC_INTERVAL_CHECKING_HPP
+#define BOOST_NUMERIC_INTERVAL_CHECKING_HPP
+
+#include <stdexcept>
+#include <string>
+#include <cassert>
+#include <boost/limits.hpp>
+
+namespace boost {
+namespace numeric {
+namespace interval_lib {
+
+struct exception_create_empty
+{
+  void operator()()
+  {
+    throw std::runtime_error("boost::interval: empty interval created");
+  }
+};
+
+struct exception_invalid_number
+{
+  void operator()()
+  {
+    throw std::invalid_argument("boost::interval: invalid number");
+  }
+};
+
+template<class T>
+struct checking_base
+{
+  static T pos_inf()
+  {
+    assert(std::numeric_limits<T>::has_infinity);
+    return std::numeric_limits<T>::infinity();
+  }
+  static T neg_inf()
+  {
+    assert(std::numeric_limits<T>::has_infinity);
+    return -std::numeric_limits<T>::infinity();
+  }
+  static T nan()
+  {
+    assert(std::numeric_limits<T>::has_quiet_NaN);
+    return std::numeric_limits<T>::quiet_NaN();
+  }
+  static bool is_nan(const T& x)
+  {
+    return std::numeric_limits<T>::has_quiet_NaN && (x != x);
+  }
+  static T empty_lower()
+  {
+    return (std::numeric_limits<T>::has_quiet_NaN ?
+            std::numeric_limits<T>::quiet_NaN() : static_cast<T>(1));
+  }
+  static T empty_upper()
+  {
+    return (std::numeric_limits<T>::has_quiet_NaN ?
+            std::numeric_limits<T>::quiet_NaN() : static_cast<T>(0));
+  }
+  static bool is_empty(const T& l, const T& u)
+  {
+    return !(l <= u); // safety for partial orders
+  }
+};
+
+template<class T, class Checking = checking_base<T>,
+         class Exception = exception_create_empty>
+struct checking_no_empty: Checking
+{
+  static T nan()
+  {
+    assert(false);
+    return Checking::nan();
+  }
+  static T empty_lower()
+  {
+    Exception()();
+    return Checking::empty_lower();
+  }
+  static T empty_upper()
+  {
+    Exception()();
+    return Checking::empty_upper();
+  }
+  static bool is_empty(const T&, const T&)
+  {
+    return false;
+  }
+};
+
+template<class T, class Checking = checking_base<T> >
+struct checking_no_nan: Checking
+{
+  static bool is_nan(const T&)
+  {
+    return false;
+  }
+};
+
+template<class T, class Checking = checking_base<T>,
+         class Exception = exception_invalid_number>
+struct checking_catch_nan: Checking
+{
+  static bool is_nan(const T& x)
+  {
+    if (Checking::is_nan(x)) Exception()();
+    return false;
+  }
+};
+
+template<class T>
+struct checking_strict:
+  checking_no_nan<T, checking_no_empty<T> >
+{};
+
+} // namespace interval_lib
+} // namespace numeric
+} // namespace boost
+
+#endif // BOOST_NUMERIC_INTERVAL_CHECKING_HPP