load str decl plugin; recognize String sorted constants

src/smt/theory_str.h

@@ -0,0 +1,50 @@
+/*++
+Module Name:
+
+    theory_str.h
+
+Abstract:
+
+    String Theory Plugin
+
+Author:
+
+    Murphy Berzish (mtrberzi) 2015-09-03
+
+Revision History:
+
+--*/
+#ifndef _THEORY_STR_H_
+#define _THEORY_STR_H_
+
+#include"smt_theory.h"
+#include"trail.h"
+#include"th_rewriter.h"
+#include"value_factory.h"
+#include"smt_model_generator.h"
+
+namespace smt {
+
+    class str_value_factory : public value_factory {
+        // TODO
+    };
+
+    class theory_str : public theory {
+        // TODO
+    protected:
+        virtual bool internalize_atom(app * atom, bool gate_ctx);
+        virtual bool internalize_term(app * term);
+
+        virtual void new_eq_eh(theory_var, theory_var);
+        virtual void new_diseq_eh(theory_var, theory_var);
+        virtual theory* mk_fresh(context*) { return alloc(theory_str, get_manager()); }
+    public:
+        theory_str(ast_manager& m);
+        virtual ~theory_str();
+    protected:
+        void attach_new_th_var(enode * n);
+    };
+
+};
+
+#endif /* _THEORY_STR_H_ */