Method __printstmt

PyBasic/basicparser.py:334–429

Parses a PRINT statement, causing the value that is on top of the operand stack to be printed on the screen.

(self)

                                   + str(self.__line_number))

    def __printstmt(self):
        """Parses a PRINT statement, causing
        the value that is on top of the
        operand stack to be printed on
        the screen.

        """
        self.__advance()   # Advance past PRINT token

        fileIO = False
        if self.__token.category == Token.HASH:
            fileIO = True

            # Process the # keyword
            self.__consume(Token.HASH)

            # Acquire the file number
            self.__expr()
            filenum = self.__operand_stack.pop()

            if self.__file_handles.get(filenum) == None:
                raise RuntimeError("PRINT: file #"+str(filenum)+" not opened in line " + str(self.__line_number))

            # Process the comma
            if self.__tokenindex < len(self.__tokenlist) and self.__token.category != Token.COLON:
                self.__consume(Token.COMMA)

        # Check there are items to print
        last_token_cat = None
        if not self.__tokenindex >= len(self.__tokenlist) and self.__token.category != Token.COLON:
            last_token_cat = self.__token.category
            prntTab = (self.__token.category == Token.TAB)
            self.__logexpr()

            #if type(self.__operand_stack[-1]) == tuple and self.__operand_stack[-1][0] == "TAB":
            if prntTab:
                if self.__prnt_column >= len(self.__operand_stack[-1]):
                    if fileIO:
                        self.__file_handles[filenum].write("\n")
                    else:
                        print()
                    self.__prnt_column = 0

                current_pr_column = len(self.__operand_stack[-1]) - self.__prnt_column
                self.__prnt_column = len(self.__operand_stack.pop()) - 1
                if current_pr_column > 1:
                    if fileIO:
                        self.__file_handles[filenum].write(" "*(current_pr_column-1))
                    else:
                        print(" "*(current_pr_column-1), end="")
            else:
                self.__prnt_column += len(str(self.__operand_stack[-1]))
                if fileIO:
                    self.__file_handles[filenum].write('%s' %(self.__operand_stack.pop()))
                else:
                    print(self.__operand_stack.pop(), end='')

            while self.__token.category == Token.COMMA or self.__token.category == Token.SEMICOLON: