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+
+// Copyright Joakim Karlsson & Kim Gräsman 2010-2012.
+// 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 IGLOO_ASSERT_H
+#define IGLOO_ASSERT_H
+
+#include "stringize.h"
+#include "stringizers.h"
+
+namespace snowhouse {
+
+ struct DefaultFailureHandler
+ {
+ template <class ExpectedType, class ActualType>
+ static void Handle(const ExpectedType& expected, const ActualType& actual, const char* file_name, int line_number)
+ {
+ std::ostringstream str;
+
+ str << "Expected: " << snowhouse::Stringize(expected) << std::endl;
+ str << "Actual: " << snowhouse::Stringize(actual) << std::endl;
+
+ throw AssertionException(str.str(), file_name, line_number);
+ }
+
+ static void Handle(const std::string& message)
+ {
+ throw AssertionException(message);
+ }
+ };
+
+ template<typename FailureHandler>
+ class ConfigurableAssert
+ {
+ public:
+
+ template <typename ActualType, typename ConstraintListType>
+ static void That(const ActualType& actual, ExpressionBuilder<ConstraintListType> expression)
+ {
+ const char* no_file = "";
+ int line_number = 0;
+
+ ConfigurableAssert<FailureHandler>::That(actual, expression, no_file, line_number);
+ }
+
+ template <typename ActualType, typename ConstraintListType>
+ static void That(const ActualType& actual, ExpressionBuilder<ConstraintListType> expression, const char* file_name, int line_number)
+ {
+ try
+ {
+ ResultStack result;
+ OperatorStack operators;
+ expression.Evaluate(result, operators, actual);
+
+ while (!operators.empty())
+ {
+ ConstraintOperator* op = operators.top();
+ op->PerformOperation(result);
+ operators.pop();
+ }
+
+ if (result.empty())
+ {
+ throw InvalidExpressionException("The expression did not yield any result");
+ }
+
+ if (!result.top())
+ {
+ FailureHandler::Handle(expression, actual, file_name, line_number);
+ }
+ }
+ catch (const InvalidExpressionException& e)
+ {
+ FailureHandler::Handle("Malformed expression: \"" + snowhouse::Stringize(expression) + "\"\n" + e.Message());
+ }
+ }
+
+ template <typename ConstraintListType>
+ static void That(const char* actual, ExpressionBuilder<ConstraintListType> expression)
+ {
+ return That(std::string(actual), expression);
+ }
+
+ template <typename ActualType, typename ExpressionType>
+ static void That(const ActualType& actual, const ExpressionType& expression)
+ {
+ const char* no_file = "";
+ int no_line = 0;
+ That(actual, expression, no_file, no_line);
+ }
+
+ template <typename ActualType, typename ExpressionType>
+ static void That(const ActualType& actual, const ExpressionType& expression, const char* file_name, int line_number)
+ {
+ if (!expression(actual))
+ {
+ FailureHandler::Handle(expression, actual, file_name, line_number);
+ }
+ }
+
+ template <typename ExpressionType>
+ static void That(const char* actual, const ExpressionType& expression)
+ {
+ return That(std::string(actual), expression);
+ }
+
+ static void That(bool actual)
+ {
+ if (!actual)
+ {
+ FailureHandler::Handle("Expected: true\nActual: false");
+ }
+ }
+
+ static void Failure(const std::string& message)
+ {
+ FailureHandler::Handle(message);
+ }
+ };
+
+ typedef ConfigurableAssert<DefaultFailureHandler> Assert;
+}
+
+#endif // IGLOO_ASSERT_H