string slicing using len()

[boriel]

A new compiler version (r1564) has been uploaded. It allows you to use --string-base parameter to tell the compiler which is the 1st base-index position in strings:

Code:

./zxb.py --string-base=1 ...

The same applies for array (--array-base). So if you want arrays to start at index 1, use --array-base=1.
Also using --sinclair enables all this compatibilities with a single parameter.