Reorganize combination of objectives

src/opt/objective_ast.cpp

@@ -0,0 +1,54 @@
+/*++
+Copyright (c) 2013 Microsoft Corporation
+
+Module Name:
+
+    objective_ast.h
+
+Abstract:
+    Abstract data-type for compound objectives.
+
+Author:
+
+    Anh-Dung Phan (t-anphan) 2013-11-26
+
+Notes:
+
+--*/
+
+#include"objective_ast.h"
+
+namespace opt {
+
+    objective* objective::mk_max(expr_ref& e) { return alloc(min_max_objective, MAXIMIZE, e); };
+    objective* objective::mk_min(expr_ref& e) { return alloc(min_max_objective, MINIMIZE, e); };
+    objective* objective::mk_maxsat(symbol id) { return alloc(maxsat_objective, id); };
+
+    objective* objective::mk_lex(unsigned sz, objective * const* children) { 
+        return alloc(compound_objective, LEX, sz, children); 
+    };
+
+    objective* objective::mk_box(unsigned sz, objective * const* children) {
+        return alloc(compound_objective, BOX, sz, children);  
+    };
+
+    objective* objective::mk_pareto(unsigned sz, objective * const* children) {
+        return alloc(compound_objective, PARETO, sz, children); 
+    };
+
+    compound_objective& objective::get_compound() { 
+        SASSERT(m_type == LEX || m_type == BOX || m_type == PARETO); 
+        return dynamic_cast<compound_objective&>(*this);
+    }
+
+    min_max_objective& objective::get_min_max() {
+        SASSERT(m_type == MAXIMIZE || m_type == MINIMIZE); 
+        return dynamic_cast<min_max_objective&>(*this);
+    }
+
+    maxsat_objective& objective::get_maxsat() {
+        SASSERT(m_type == MAXSAT); 
+        return dynamic_cast<maxsat_objective&>(*this);
+    }
+
+};