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+//
+//
+//           The Nimrod Compiler
+//        (c) Copyright 2008 Andreas Rumpf
+//
+//    See the file "copying.txt", included in this
+//    distribution, for details about the copyright.
+//
+
+unit optast;
+
+// Optimizations that can be done by AST transformations. The code generators
+// should work without the optimizer. The optimizer does the following:
+
+// - cross-module constant merging
+// - cross-module generic merging
+// - lowers set operations to bit operations
+// - inlining of procs
+// - ``s == ""`` --> ``len(s) == 0``
+// - optimization of ``&`` string operator
+
+interface
+
+{$include 'config.inc'}
+
+uses
+  nsystem, ast, astalgo, strutils, hashes, trees, treetab, platform, magicsys,
+  options, msgs, crc, idents, lists, types, ropes, nmath, wordrecg, rnimsyn;
+  
+implementation
+
+
+end.
+