Method __assignmentstmt

PyBasic/basicparser.py:485–516

Parses an assignment statement, placing the corresponding variable and its value in the symbol table.

(self)

        return FlowSignal(ftype=FlowSignal.STOP)

    def __assignmentstmt(self):
        """Parses an assignment statement,
        placing the corresponding
        variable and its value in the symbol
        table.

        """
        left = self.__token.lexeme  # Save lexeme of
                                    # the current token
        self.__advance()

        if self.__token.category == Token.LEFTPAREN:
            # We are assiging to an array
            self.__arrayassignmentstmt(left)

        else:
            # We are assigning to a simple variable
            self.__consume(Token.ASSIGNOP)
            self.__logexpr()

            # Check that we are using the right variable name format
            right = self.__operand_stack.pop()

            if left.endswith('$') and not isinstance(right, str):
                raise SyntaxError('Syntax error: Attempt to assign non string to string variable' +
                                  ' in line ' + str(self.__line_number))

            elif not left.endswith('$') and isinstance(right, str):
                raise SyntaxError('Syntax error: Attempt to assign string to numeric variable' +
                                  ' in line ' + str(self.__line_number))

            self.__symbol_table[left] = right

    def __dimstmt(self):
        """Parses  DIM statement and creates a symbol