jhester / piethon-interpreter

A bastardized python interpreter with all the useful features of the language stripped out. Purely an academic exercise with lex / flex and yacc / bison.

piethon-interpreter

A bastardized, poorly written, barely functional python interpreter with all the useful features of the language stripped out. Purely an academic exercise with lex / flex and yacc / bison.

FEATURES

• Abstract Syntax Tree:

    - The program builds and draws an AST of all functions on run using graphviz
  

  Semantics checking throughout, similar to how clang does it: - Checks to see if called function arguments match function signature - Checks to see you have declared a main function - Checks if program has instantiated a variable before use

• Python style comments supported:

    - multiline and single line
  

• List / Array Support

    - Can instantiate arrays with multiple types, including identifiers (resolved on creation) floats and integers
    - Can set an index in the array
    - Can get values from the array to set variables
    - can use the pop() and append() methods on lists
  

• Built-in functions:

    - len() now provided for lists
  

• while loops

    - super awesome, super powerful
  

USAGE

Use make to build the program:

Run individual test cases with: ./run < testsuite/[NAME_OF_TEST_CASE].py

To create the AST, just enter make pdf This generates the AST ast.pdf from AST.gv

make clean clears all the intermediate files and executables.