This interpreter takes input in the form of objects, tokenizes the input and samples, parses them and then interepretes them.
The lexer groups the input characters into small segments called tokens and identifies the type of each token.
The characters in the input {var_1: 1, var_2: 4, var_3: 2, var_4: 3} are grouped into the tokens: INPUTSTART, VARIABLE:var_1, ISASSIGNED, NUMBER:1, VARIABLE:var_2, ISASSIGNED, NUMBER:4}, {VARIABLE:var_3, ISASSIGNED, NUMBER:2 and VARIABLE:var_4, ISASSIGNED, NUMBER:3, INPUTEND.
The characters in the sample if (var_1 == 2, if (var_2 == 4, 15, 0), 0 ) are grouped into the tokens STATEMENT LPAREN VARIABLE:var_1, EQUALTO, NUMBER:2, TRUTHY , {STATEMENT LPAREN VARIABLE:var_2, EQUALTO, NUMBER:4, TRUTHY, NUMBER:15 FALSY, NUMBER:0 RPAREN, FALSY, NUMBER:0, RPAREN.
Whitespace is usually ignored by the lexer.
The tokens are then passed on to the parser.
The created tokens are convereted into a logic tree by the parser, and then passed to the interpreter.
The interpeter executes the logic tree by carrying out all the logical and arithmetic operations and provides a result.
Requirements:
- Python3 ^3.8
Run: $PYTHON3 main.py and supply your input variables as a dictionary e.g {var_1: 1, var_2: 4, var_3: 2, var_4: 3}.
Ensure your variable names match the variable names in the sample declared in main.py
Unit testing:
$PYTHON3 -m unittest lexer_test parser_test interpreter_test