qedsoftware / bamboolean

Are you bamboozled by Booleans? Let Bamboolean interpret them.

Bamboolean interpreter

Supported from Python >= 3.6

Implementation of Bamboolean - Boolean Logic Language

Bamboolean is a simple language that consumes array of pre-defined variables, and returns boolean value if constraints on these variables are met.

Exemplary expressions in the language

Features

• Case in-sensitive variable names and keywords
• Comparison operators (listed below)
• Logic AND / OR / NOT
• Expressions with parentheses
• Types: Float, Int, String, Bool, Variable
• Truth value testing same as in Python
• Implicit cast of variables to boolean when no relational operator is specified

Operators associativity

All operators are left-associative

Operators precedence (the higher number the higher priority)

1. OR
2. AND
3. NOT
4. == | != | < | <= | > | >=

Testing

Run tests:

`python run_tests.py`

EBNF Grammar

compound_expr : expr
              | empty

expr : simple_expr (OR simple_expr)*

simple_expr : term (AND term)*

term : statement
     | LPAREN expr RPAREN
     | NOT term

statement : value
          | constraint

constraint : variable (relational_operator value)?

relational_operator : ( EQ | NE | LT | LTE | GT | GTE )

value : INTEGER
      | FLOAT
      | STRING
      | BOOL

variable : ID

empty :