Imported Upstream version 1.49.0upstream/1.49.0

1 files changed, 73 insertions, 0 deletions

diff --git a/boost/wave/cpplexer/cpp_lex_interface.hpp b/boost/wave/cpplexer/cpp_lex_interface.hpp
new file mode 100644
index 0000000000..c69f8aaa53
--- /dev/null
+++ b/boost/wave/cpplexer/cpp_lex_interface.hpp
@@ -0,0 +1,73 @@
+/*=============================================================================
+    Boost.Wave: A Standard compliant C++ preprocessor library
+
+    Definition of the abstract lexer interface
+    
+    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(CPP_LEX_INTERFACE_HPP_E83F52A4_90AC_4FBE_A9A7_B65F7F94C497_INCLUDED)
+#define CPP_LEX_INTERFACE_HPP_E83F52A4_90AC_4FBE_A9A7_B65F7F94C497_INCLUDED
+
+#include <boost/wave/wave_config.hpp>
+#include <boost/wave/util/file_position.hpp>
+#include <boost/wave/language_support.hpp>
+
+// this must occur after all of the includes and before any code appears
+#ifdef BOOST_HAS_ABI_HEADERS
+#include BOOST_ABI_PREFIX
+#endif
+
+// suppress warnings about dependent classes not being exported from the dll
+#ifdef BOOST_MSVC
+#pragma warning(push)
+#pragma warning(disable : 4251 4231 4660)
+#endif
+
+///////////////////////////////////////////////////////////////////////////////
+namespace boost {
+namespace wave {
+namespace cpplexer {
+
+///////////////////////////////////////////////////////////////////////////////
+//
+//  The lex_input_interface decouples the lex_iterator_shim from the actual 
+//  lexer. This is done to allow compile time reduction.
+//  Thanks to JCAB for having this idea.
+//
+///////////////////////////////////////////////////////////////////////////////
+
+template <typename TokenT>
+struct lex_input_interface 
+{
+    typedef typename TokenT::position_type position_type;
+
+    lex_input_interface() {}
+    virtual ~lex_input_interface() {}
+
+    virtual TokenT& get(TokenT&) = 0;
+    virtual void set_position(position_type const &pos) = 0;
+#if BOOST_WAVE_SUPPORT_PRAGMA_ONCE != 0
+    virtual bool has_include_guards(std::string& guard_name) const = 0;
+#endif
+};
+
+///////////////////////////////////////////////////////////////////////////////
+}   // namespace cpplexer
+}   // namespace wave
+}   // namespace boost 
+
+#ifdef BOOST_MSVC
+#pragma warning(pop)
+#endif
+
+// the suffix header occurs after all of the code
+#ifdef BOOST_HAS_ABI_HEADERS
+#include BOOST_ABI_SUFFIX
+#endif
+
+#endif // !defined(CPP_LEX_INTERFACE_HPP_E83F52A4_90AC_4FBE_A9A7_B65F7F94C497_INCLUDED)