Big assertion capture refactoring.

- moved as much logic out of the macros as possible
- moved most logic into new ResultBuilder class, which wraps ExpressionResultBuilder (may take it over next), subsumes ResultAction and also takes place of ExpressionDecomposer.

This introduces many SRP violations - but all in the name of minimising macro logic!

include/internal/catch_result_builder.h

@@ -0,0 +1,49 @@
+/*
+ *  Created by Phil on 28/5/2014.
+ *  Copyright 2014 Two Blue Cubes Ltd. All rights reserved.
+ *
+ *  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 TWOBLUECUBES_CATCH_RESULT_BUILDER_H_INCLUDED
+#define TWOBLUECUBES_CATCH_RESULT_BUILDER_H_INCLUDED
+
+#include "catch_expression_lhs.hpp"
+#include "catch_expressionresult_builder.h"
+#include "catch_common.h"
+
+namespace Catch {
+
+    struct TestFailureException{};
+
+    struct ResultBuilder {
+        ResultBuilder(  char const* macroName,
+                        SourceLineInfo const& lineInfo,
+                        char const* capturedExpression,
+                        ResultDisposition::Flags resultDisposition );
+
+        template<typename T>
+        ExpressionLhs<T const&> operator->* ( T const& operand ) {
+            return ExpressionLhs<T const&>( *this, operand );
+        }
+
+        ExpressionLhs<bool> operator->* ( bool value ) {
+            return ExpressionLhs<bool>( *this, value );
+        }
+
+        void useActiveException( ResultDisposition::Flags resultDisposition = ResultDisposition::Normal );
+        void captureResult( ResultWas::OfType resultType );
+        void captureExpression();
+        void react();
+        bool shouldDebugBreak() const;
+        bool allowThrows() const;
+
+        AssertionInfo m_assertionInfo;
+        ExpressionResultBuilder m_resultBuilder;
+        bool m_shouldDebugBreak;
+        bool m_shouldThrow;
+    };
+
+} // end namespace Catch
+
+#endif // TWOBLUECUBES_CATCH_RESULT_BUILDER_H_INCLUDED