put parser, lexer, and evaluator in namespace; interpreter now owns evaluator * oct-parse.in.yy, parse.h: Move parser classes to octave namespace. * lex.ll, lex.h: Move lexer classes to octave namespace. * pt-eval.h, pt-eval.cc: Move evaluator class to octave namespace. Don't define global current evaluator pointer here. * debug.cc, error.cc, input.cc, input.h, ls-mat-ascii.cc, pt-jit.cc, sighandlers.cc, utils.cc, variables.cc, ov-usr-fcn.cc, pt-assign.cc, pt-exp.h, pt-id.cc: Update for namespaces. * interpreter.cc, interpreter.h (current_evaluator): New global var. (interpreter::m_evaluator): New data member. (interpreter::~interpreter): Delete evaluator.

--- a/libinterp/parse-tree/pt-exp.h	Mon Aug 01 09:52:51 2016 -0700
+++ b/libinterp/parse-tree/pt-exp.h	Tue Jul 12 14:28:07 2016 -0400
@@ -95,7 +95,7 @@
 
   // Check if the result of the expression should be printed.
   // Should normally be used in conjunction with
-  // tree_evaluator::statement_printing_enabled.
+  // octave::tree_evaluator::statement_printing_enabled.
   bool print_result (void) const { return print_flag; }
 
   virtual std::string oper (void) const { return "<unknown>"; }