Beispiel #1
0
    def p_if_3(self, p):
        """if : IF LP exp RP block elseifs %prec prec2"""
        print(
            "hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii"
        )
        p[0] = Nonterminal()
        p[0].list = []
        p[3].list = []
        p[3].list.append(p[3].true_list)
        p[3].list.append(p[3].false_list)

        num_of_elseifs = len(p[6].list)

        p[0].list = p[6].list
        p[0].list.insert(0, p[3].list)
        # print(p[0].list)
        p[0].code_list = p[6].code
        p[0].code_list.insert(0, p[5].code)
        # print(p[0].code)

        next_code_label = str(
            self.get_num_of_last_label(p[0].code_list[-1]) + 1)
        code = "L" + next_code_label + ": "
        self.code_list.append(code)

        if_list = p[0].list[0]
        self.backpatch(if_list[0], self.get_start(p[0].code_list[0]))
        self.backpatch(if_list[1], "L" + str(p[0].list[1][0][0]))

        for i in range(1, num_of_elseifs + 1):
            c = p[0].code_list[i]
            c_list = c.split(";")
            code_in_code_list = c_list[-2] + ";"
            index = self.code_list.index(code_in_code_list)
            new_code_in_code_list = code_in_code_list + "goto " + "L" + next_code_label + ";"
            self.code_list.insert(index, new_code_in_code_list)
            self.code_list.pop(index + 1)
            c = c + "goto " + "L" + next_code_label + ";"
            p[0].code_list[i] = c

        for i in range(1, num_of_elseifs + 1):
            list = p[0].list[i]
            self.backpatch(list[0], self.get_start(p[0].code_list[i]))
            if i == num_of_elseifs:
                self.backpatch(list[1], self.get_start(p[0].code_list[-1]))
            else:
                self.backpatch(list[1], code)

        print(self.code_list)
        self.produce_output()
        print(
            "hiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii"
        )
Beispiel #2
0
 def p_elseifs_2(self, p):
     """elseifs : elseif"""
     print("""elseifs -> elseif""")
     p[0] = Nonterminal()
     p[0].code = []
     p[0].code.append(p[1].code)
     p[0].list = []
     p[0].list.append(p[1].list)
Beispiel #3
0
    def p_elseif(self, p):
        """elseif : ELSEIF LP exp RP block %prec ELSEIF"""
        print("""elseif -> ELSEIF LP exp RP block""")
        # print("true_list")
        # print(p[3].true_list)
        # print("false_list")
        # print(p[3].false_list)
        # print("code block")
        # print(p[5].code)

        p[0] = Nonterminal()
        p[0].code = p[5].code
        p[0].list = []
        p[0].list.append(p[3].true_list)
        p[0].list.append(p[3].false_list)