将 function 从 java 转换为 kotlin

Question

i tried pasing a java function in my Kotlin project and in automatically converted to Kotlin but still has an error.

 if (ch.toInt() >= 0x0660 && ch.toInt() <= 0x0669)
            ch -= 0x0660 - '0'
        else if (ch.toInt() >= 0x06f0 && ch.toInt() <= 0x06F9)
            ch -= 0x06f0 - '0'

it is giving error on the - "0" the error is: Non of the following functions can be called with the argument supplied

Answer 1

This is because kotlin doesn't type cast between char and int. You'll have to invoke .toInt() on the '0' like you already did with the char. The Int class only supports minus with the following types:

• Byte
• Short
• Int
• Long
• Float
• Double
  
  Link to the minus operator functions of Int .
  
  On the other side, Char only supports Char and Int when it comes to minus .