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/* ____ ____ ____ ____ ______ *\
** / __// __ \/ __// __ \/ ____/ SOcos COmpiles Scala **
** __\_ \/ /_/ / /__/ /_/ /\_ \ (c) 2002, LAMP/EPFL **
** /_____/\____/\___/\____/____/ **
\* */
// $Id$
package scalac.util;
import java.util.HashMap;
public class FreshNameCreator {
protected int counter = 0;
protected HashMap counters = new HashMap();
/**
* Create a fresh name with the given prefix. It is guaranteed
* that the returned name has never been returned by a previous
* call to this function with the same separator character (which
* has to be a non-digit).
*/
public Name newName(String prefix, char separator) {
prefix += separator;
Integer ival = (Integer)counters.get(prefix);
if (ival == null)
counters.put(prefix, ival = new Integer(0));
else
counters.put(prefix, ival = new Integer(ival.intValue() + 1));
return Name.fromString(prefix + ival);
}
/** Same, with `$' as the separator character
*/
public Name newName(String prefix) {
return newName(prefix, '$');
}
/** Same, but with a name as prefix. The new name is a type
* (respectively, constructor) name if the prefix is one.
*/
public Name newName(Name prefixName, char separator) {
Name name = newName(prefixName.toString(), separator);
if (prefixName.isTypeName()) return name.toTypeName();
else if (prefixName.isConstrName()) return name.toConstrName();
else return name;
}
/** Same, with `$' as the separator character
*/
public Name newName(Name prefix) {
return newName(prefix, '$');
}
public Name newName() {
return Name.fromString("$" + (counter++) + "$");
}
}
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