in src/main/org/apache/ant/props/stringops/PatternOperation.java [69:77]
public boolean process(StringBuffer sb, ParsePosition pos) {
int index = pos.getIndex();
if (sb.charAt(index) == patternChar) {
sb.replace(index, index + 1, regexpPattern);
pos.setIndex(index + regexpPattern.length());
return true;
}
return false;
}