Z3 sources

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

lib/expr_weight.cpp

@@ -0,0 +1,32 @@
+/*++
+Copyright (c) 2007 Microsoft Corporation
+
+Module Name:
+
+    expr_weight.cpp
+
+Abstract:
+
+    Functor for computing the weight of an expression.
+
+Author:
+
+    Leonardo (leonardo) 2008-01-11
+
+Notes:
+
+--*/
+#include"expr_weight.h"
+#include"recurse_expr_def.h"
+
+template class recurse_expr<weight, expr_weight_visitor, true>;
+
+weight expr_weight_visitor::visit(app const * n, weight const * args) {
+    weight r(1);
+    unsigned j = n->get_num_args();
+    while (j > 0) {
+        --j;
+        r += args[j];
+    }
+    return r;
+}