Thrift: docstring revamp step 2.

Summary:
It was a bad idea to let doxygen comments become a part of the parse tree.
We now get them a totally different way.  The lexer stashes the docsting
contents in a global, and the parser actions (not the rules) pull it out.
This should prevent doxygen comments from ever causing parse errors.

Blame Rev: 52678, 52732

Reviewed By: mcslee

Test Plan:
Recompiled thrift.
Thrifted a bunch of files and saw no parse errors (or C++ compile errors).
Thrifted DocTest.thrift with dump_docs on.

Revert Plan: ok


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665201 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/compiler/cpp/src/globals.h b/compiler/cpp/src/globals.h
index 8b3ae19..8560efd 100644
--- a/compiler/cpp/src/globals.h
+++ b/compiler/cpp/src/globals.h
@@ -87,4 +87,14 @@
  */
 extern char* g_time_str;
 
+/**
+ * The last parsed doctext comment.
+ */
+extern char* g_doctext;
+
+/**
+ * The location of the last parsed doctext comment.
+ */
+extern int g_doctext_lineno;
+
 #endif