Automatically change pass-by-value to pass-by-reference

I have many hundreds of functions from a manual java to c++ port. In the result c++ code, I wish to change parameters passed by value to passed by reference:

from:
void funcName1( Type1 t1, Type2 t2, int i);
to:
void funcName2( Type1& t1, Type2& t2, int i);

Preferably leave the primitive types such as int, float unchanged.

Any refactoring tools to automate this process? Some regular expression tricks?

Or any tool that converts portable java code to c+开发者_高级运维+?

Try creating 2 regular expressions:

void\s+\w+\(([^\)]+))
([A-Z]\w+)\s+\w+

Matching group 1 from the first will give you:

 Type1 t1, Type2 t2, int i

Run the second against this output and group 1 will be:

 Type

If you're using java, you can convert quickly with:

Pattern p = Pattern.compile("(void\\s+\\w+\\s+\)(([^\\)]+))");
Pattern p2 = Pattern.compile("([A-Z]\\w+)(\\s+\\w+)");
Matcher m = p.matcher("input.....");

StringBuffer sb = new StringBuffer();
while(m.find()) {
   Matcher m2 = p2.matcher(m.group(0));

   StringBuffer sb2 = new StringBuffer();
   while(m2.find()) {
      m2.appendReplacement(sb2, "$1&$2")
   }
   m2.appendTail(sb2);

   m.appendReplacement(sb, "$1("+sb2.toString()+")")
}
m.appendTail(sb);