boolean datatype still needs to be implemented.

[gero3]

boolean datatype

• possible values:
  • true
  • false

[gero3]

initial version is implemented

[gero3]

Implement operators to make boolean somewhat useful:

• '&'
• '|'
• '!'

add operators to binary expression to return boolean from comparing numbers:

• '>'
• '<'
• '=>'
• '=<'