* CONV_BOOL
Automatically convert 'f' and 't' to FALSE and TRUE and vice versa.
* CONV_INT
- Automatically convert integral strings to either int if it fits into maximum integer size and vice versa.
+ Automatically convert integral strings to either int if it fits into maximum integer size or else to float and vice versa.
* CONV_FLOAT
Automatically convert floating point numbers.
* CONV_SCALAR