1 files changed, 83 insertions, 0 deletions
diff --git a/boost/wave/util/iteration_context.hpp b/boost/wave/util/iteration_context.hpp
new file mode 100644
index 0000000000..8673f46639
--- /dev/null
+++ b/boost/wave/util/iteration_context.hpp
@@ -0,0 +1,83 @@
+/*=============================================================================
+    Boost.Wave: A Standard compliant C++ preprocessor library
+
+    http://www.boost.org/
+
+    Copyright (c) 2001-2011 Hartmut Kaiser. 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)
+=============================================================================*/
+
+#if !defined(ITERATION_CONTEXT_HPP_9556CD16_F11E_4ADC_AC8B_FB9A174BE664_INCLUDED)
+#define ITERATION_CONTEXT_HPP_9556CD16_F11E_4ADC_AC8B_FB9A174BE664_INCLUDED
+
+#include <cstdlib>
+#include <cstdio>
+#include <stack>
+
+#include <boost/wave/wave_config.hpp>
+#include <boost/wave/cpp_exceptions.hpp>
+
+// this must occur after all of the includes and before any code appears
+#ifdef BOOST_HAS_ABI_HEADERS
+#include BOOST_ABI_PREFIX
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+namespace boost {
+namespace wave {
+namespace util {
+
+///////////////////////////////////////////////////////////////////////////////
+template <typename IterationContextT>
+class iteration_context_stack 
+{
+    typedef std::stack<IterationContextT> base_type;
+    
+public:
+    typedef typename base_type::size_type size_type;
+    
+    iteration_context_stack()
+    :   max_include_nesting_depth(BOOST_WAVE_MAX_INCLUDE_LEVEL_DEPTH)
+    {}
+    
+    void set_max_include_nesting_depth(size_type new_depth)
+        {  max_include_nesting_depth = new_depth; }
+    size_type get_max_include_nesting_depth() const
+        { return max_include_nesting_depth; }
+
+    typename base_type::size_type size() const { return iter_ctx.size(); }
+    typename base_type::value_type &top() { return iter_ctx.top(); }
+    void pop() { iter_ctx.pop(); }
+    
+    template <typename Context, typename PositionT>
+    void push(Context& ctx, PositionT const &pos, 
+        typename base_type::value_type const &val)
+    { 
+        if (iter_ctx.size() == max_include_nesting_depth) {
+        char buffer[22];    // 21 bytes holds all NUL-terminated unsigned 64-bit numbers
+
+            using namespace std;    // for some systems sprintf is in namespace std
+            sprintf(buffer, "%d", (int)max_include_nesting_depth);
+            BOOST_WAVE_THROW_CTX(ctx, preprocess_exception, 
+                include_nesting_too_deep, buffer, pos);
+        }
+        iter_ctx.push(val); 
+    }
+        
+private:
+    size_type max_include_nesting_depth;
+    base_type iter_ctx;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+}   // namespace util
+}   // namespace wave
+}   // namespace boost
+
+// the suffix header occurs after all of the code
+#ifdef BOOST_HAS_ABI_HEADERS
+#include BOOST_ABI_SUFFIX
+#endif
+
+#endif // !defined(ITERATION_CONTEXT_HPP_9556CD16_F11E_4ADC_AC8B_FB9A174BE664_INCLUDED)