Translator – LET Command

There is nothing special to say about the LET command – the format of assignment statements, less the optional LET keyword, has already been defined and implemented. When the Translator receives the LET command token, it will be pushed on the new command stack. The mode will be Command when the LET is received and, as the Translator is currently implemented, needs to left set to Command mode for the assignment statement to be processed as currently implemented.

When the assignment token is added to the output list, it will first check if there is a LET command token on top of the command stack, and if there is, then the LET sub-code flag will be set in the assignment token, the LET command will be popped from the command stack, and the LET token will be deleted.

There is a problem. The mode must be set to Command for the LET token to be accepted. The mode must be set to Command for the assignment statement. Some detection is necessary to prevent double LET keywords. To solve this problem, a new mode is needed, an Assignment mode. For most of the Translator, both Command and Assignment mode will be equivalent except for the processing of command tokens.