compilation/spf.py

#!/usr/bin/env python

# Projet de compilation Umons 2025
# Par Debucquoy Anthony (231687)

import argparse
import lark
import sys
from enum import Enum
from modules.Variables import Variables

class SPFInterpreter(lark.visitors.Interpreter):
    def __init__(self, trace=False):
        super().__init__()
        self.variables = Variables(trace)

    def while_loop(self, el):
        while self.visit_children(el.children[0])[0]:
            self.visit_children(el.children[1])

    def for_loop(self, el):
        type = el.children[0].value
        name = el.children[1].value
        self.variables.declare(type, name)

        target = self.visit_children(el.children[2])[0]
        for i in target:
            self.variables.assign(name, i)
            self.visit_children(el.children[3])
        # TODO: delete the variable out of scope

    def afficher(self, el):
        ligne = ""
        for toprint in el.children[1:]:
            ligne += str(self.visit_children(toprint)[0]) + " "
        print(ligne)

    def append(self, el):
        (_, toadd, var) = self.visit_children(el);
        var_val = self.variables.get(var.value)
        var_val.append(toadd)

    def declaration(self, el):
        type = el.children[0].value
        name = el.children[1].value
        value = self.visit_children(el.children[3])[0] if len(el.children) >= 3 else None
        self.variables.declare(type, name, value)

    def assignation(self, el):
        name = el.children[0].value
        assert el.children[1].value == "=" and el.children[2].data == "expression", "Unexpected"
        value = self.visit_children(el.children[2])[0]
        self.variables.assign(name, value)

    def equal(self, el):
        (left, sign, right) = self.visit_children(el)
        return left == right

    def unequal(self, el):
        (left, sign, right) = self.visit_children(el)
        return left != right

    def and_op(self, el):
        (left, sign, right) = self.visit_children(el)
        return left and right

    def or_op(self, el):
        (left, sign, right) = self.visit_children(el)
        return left or right

    def not_op(self, el):
        (sign, right) = self.visit_children(el)
        return not right

    def lt(self, el):
        (left, sign, right) = self.visit_children(el)
        return left < right

    def le(self, el):
        (left, sign, right) = self.visit_children(el)
        return left <= right

    def gt(self, el):
        (left, sign, right) = self.visit_children(el)
        return left > right

    def ge(self, el):
        (left, sign, right) = self.visit_children(el)
        return left >= right


    def plus(self, el):
        (left, sign, right) = self.visit_children(el)
        return left + right # Cool ça fonctionne pour les str

    def minus(self, el):
        (left, sign, right) = self.visit_children(el)
        return left - right

    def time(self, el):
        (left, sign, right) = self.visit_children(el)
        return left * right

    def divide(self, el):
        (left, sign, right) = self.visit_children(el)
        return left / right

    neg = lambda self, el:-self.visit_children(el)[1]

    sizeof = lambda self, el:len(self.visit_children(el)[1])

    def list_get(self, el):
        (left, right) = self.visit_children(el)
        return left[right-1]


    def expression(self, el):
        return self.visit_children(el)[0]

    def expressionleft(self, el):
        return self.visit_children(el)[0]

    def variable(self, el):
        return self.variables.get(el.children[0].value)

    def test(self,el):
        if self.visit_children(el.children[0])[0]:
            self.visit_children(el.children[1])
        elif len(el.children) >= 3:
            self.visit_children(el.children[2])


    # Literals
    string = lambda self, el: el.children[0][1:-1]
    entier = lambda self, el: int(el.children[0])
    true = lambda self, _: True
    false = lambda self, _: False

    def dump(self):
        self.variables.dump()



def main():
    arg_parser = argparse.ArgumentParser()
    arg_parser.add_argument("spf_file", help="Fichier source à interpréter")
    arg_parser.add_argument("-d", "--dump",
                        help="affichage de la mémoire du programme",
                        action="store_true")
    arg_parser.add_argument("-t", "--trace",
                        help="affichage de la mémoire au cours du programme",
                        action="store_true")
    arg_parser.add_argument("-p", "--pretty",
                        help="affichage de l'arbre et quite",
                        action="store_true")
    args = arg_parser.parse_args()

    with open("spf.lark") as grammar:
        spf_parser = lark.Lark(grammar, parser="lalr", strict=True, debug=True)

    with open(args.spf_file) as spf_input:
        program = spf_input.read()
        parsed = spf_parser.parse(program)

    if args.pretty:
        print(parsed.pretty())
        return

    interpreter = SPFInterpreter(args.trace)
    interpreted = interpreter.visit(parsed)

    if args.dump:
        interpreter.dump()


if __name__ == "__main__":
    main()