release-1.2

New Features

• We now support DATA + READ.
  • See examples/35-read-data.bas for a simple example, and the HTTP-server example for more complete version which draws an image of a skull and bones!
• ^ can now be used to raise integers to an arbitrary power. (e.g. "2 ^ 3 => 8".)
• We support the XOR binary & logical operator.
• We implemented support for the definition of user-defined functions DEF FN, and calling them via FN.
  • See examples/25-def-fn.bas for example usage.
• 100% test coverage of our builtin functions!

BugFixes

• SQR now errors, as it should, when given a negative number.
• Our string-primitives now support UTF8 input correctly
  • LEFT$, RIGHT$, MID$, TL, and LEN.

Breaking changes:

• The API for embedding builtins changed, again, sorry. The first argument is now an interface{}, rather than instance of the Interpreter.
  • See embed/main.go or goserver/main.go for updated usage.