From b79567fbc72df23f870049652d5f254aba948bea Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 16 Sep 2011 16:03:25 +0200
Subject: Support for views; integrated part

---
 odb/cxx-lexer.hxx | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 73 insertions(+), 6 deletions(-)

(limited to 'odb/cxx-lexer.hxx')

diff --git a/odb/cxx-lexer.hxx b/odb/cxx-lexer.hxx
index 729f196..e5b117e 100644
--- a/odb/cxx-lexer.hxx
+++ b/odb/cxx-lexer.hxx
@@ -10,29 +10,96 @@
 
 #include <string>
 
+#include <odb/cxx-token.hxx>
+
 // A C++ keyword. This is an extension to libcpp token types.
 //
 #define CPP_KEYWORD ((cpp_ttype) (N_TTYPES + 1))
 
-// A thin wrapper around cpp_reader for lexing C++ code fragments.
-//
 class cxx_lexer
 {
 public:
-  cxx_lexer ();
+  virtual
   ~cxx_lexer ();
 
 public:
   struct invalid_input {};
 
+  virtual cpp_ttype
+  next (std::string& token) = 0;
+
+public:
+  static char const* token_spelling[N_TTYPES + 1];
+};
+
+
+// Adapter to scan a saved token sequence.
+//
+class cxx_tokens_lexer: public cxx_lexer
+{
+public:
   void
-  start (std::string const&);
+  start (cxx_tokens const&);
 
-  cpp_ttype
+  virtual cpp_ttype
   next (std::string& token);
 
+private:
+  cxx_tokens const* tokens_;
+  cxx_tokens::const_iterator cur_;
+};
+
+
+// A thin wrapper around the pragma_lex() function that recognizes
+// CPP_KEYWORD.
+//
+class cxx_pragma_lexer: public cxx_lexer
+{
 public:
-  static char const* token_spelling[N_TTYPES + 1];
+  void
+  start ();
+
+  // Start with an already extracted (using the pragma_lex() function)
+  // token. This function translates the CPP_NAME to CPP_KEYWORD if
+  // necessary and returns the string token. It also uses the passed
+  // token and type for subsequent calls to next() so after the last
+  // next() call they will contain the information about the last
+  // token parsed.
+  //
+  std::string
+  start (tree& token, cpp_ttype& type);
+
+  virtual cpp_ttype
+  next (std::string& token);
+
+private:
+  std::string
+  translate ();
+
+private:
+  tree* token_;
+  cpp_ttype* type_;
+
+  tree token_data_;
+  cpp_ttype type_data_;
+};
+
+// A thin wrapper around cpp_reader for lexing C++ code fragments.
+//
+class cxx_string_lexer: public cxx_lexer
+{
+public:
+  cxx_string_lexer ();
+
+  virtual
+  ~cxx_string_lexer ();
+
+public:
+  void
+  start (std::string const&);
+
+  virtual cpp_ttype
+  next (std::string& token);
 
 private:
   std::string data_;
-- 
cgit v1.1