152     Printer(raw_ostream &ostream) : prn(ostream) {}  in print()
156       prn << " + ";  in print()
161       prn << " - ";  in print()
164     void visitDim(SDBMDimExpr expr) { prn << 'd' << expr.getPosition(); }  in print()
165     void visitSymbol(SDBMSymbolExpr expr) { prn << 's' << expr.getPosition(); }  in print()
170         prn << '(';  in print()
173         prn << ')';  in print()
174       prn << " # ";  in print()
179       prn << '-';  in print()
181         prn << '(';  in print()
184         prn << ')';  in print()
186     void visitConstant(SDBMConstantExpr expr) { prn << expr.getValue(); }  in print()
188     raw_ostream &prn;  in print()  member