This is a lexical analyzer built for the fictional language Mini-Power. Mini-Power is a language comprised of assign and print statements. Number literals can be assigned to variables, and manipulated with basic arithmetic operators. For more information about the language take a look at the EBNF section below
Clone the project and navigate to the project directory from the command line. Then invoke the lexer with the following command:
python lexer.py <path_to_mini_power_program>A list of tokens will be written to the input.out file in the project directory
NOTE: There are two sample programs included in this repository. Do not be supprised if test02.txt raises an error, it is meant to test the Lexer's error handling.
For info on how to read EBNF go here.
Mini – Power
<stmts> -> <stmt> {; <stmt>}
<stmt> -> (<print-stmt> | <assgmt-stmt>)
<print-stmt> -> PRINT(<id> | <const>)
<assgmt-stmt> -> <id> = (<expr> | <string>)
<id> -> <letter>{(<letter> | <digit>)}($|#|%)
<expr> -> <expr> (+ | -) <term> | <term>
<term> -> <term> (* | /) <factor> | <factor>
<factor> -> <expr> ^ <factor> | ( <expr> ) | <num-const> | <id>
<const> -> <num-const> | <string>
<num-const> -> <int-const> | <real-const>
<int-const> -> [(+|-)] <digit>{<digit>}
<real-const> -> [(+|-)] <digit>{<digit>}.{<digit>}
<string> -> ʺ{(<letter> | <digit>)}ʺ
<digit> -> (0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9)
<letter> -> (a | b | c | d | e | f | g | h | i | j | k | l | m | n | o | p | q | r | s | t | u | v | w | x | y | z)