/** Flatten complex expressions within the AST */ public Node leave(Node old, Node n, NodeVisitor v) { if (n == noFlatten) { noFlatten = null; return n; } if (n instanceof Block) { List l = (List) stack.removeFirst(); return ((Block) n).statements(l); } else if (n instanceof Stmt && !(n instanceof LocalDecl)) { List l = (List) stack.getFirst(); l.add(n); return n; } else if (n instanceof Expr && !(n instanceof Lit) && !(n instanceof Special) && !(n instanceof Local)) { Expr e = (Expr) n; if (e instanceof Assign) { return n; } // create a local temp, initialized to the value of the complex // expression String name = newID(); LocalDecl def = nf.LocalDecl( e.position(), Flags.FINAL, nf.CanonicalTypeNode(e.position(), e.type()), name, e); def = def.localInstance(ts.localInstance(e.position(), Flags.FINAL, e.type(), name)); List l = (List) stack.getFirst(); l.add(def); // return the local temp instead of the complex expression Local use = nf.Local(e.position(), name); use = (Local) use.type(e.type()); use = use.localInstance(ts.localInstance(e.position(), Flags.FINAL, e.type(), name)); return use; } return n; }