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Rev

Why do you need a parser to check the range used? Can't you just look at the last line of the file?

dave
– dave

2020-01-16 02:20:10 +00:00
Commented Jan 16, 2020 at 2:20
You still have to parse the number :-) It's all regex in the end.

Maury Markowitz
– Maury Markowitz

2020-01-16 15:06:08 +00:00
Commented Jan 16, 2020 at 15:06
While BBC BASIC did accept 0 as a line number, an error at line 0 would be reported with the "at line 0" omitted as if it were an immediate mode error.

TheBeardyMan
– TheBeardyMan

2020-10-21 10:30:54 +00:00
Commented Oct 21, 2020 at 10:30
Do you have a link to your lex/yacc code and the results? I'm curious what the maximums were and what the "reserved for system use" line numbers were used for on various machines. (Also, does "-ve" mean "negative"? You may want to change that in your answer as it was confusing.)

hackerb9
– hackerb9

2022-08-24 21:23:03 +00:00
Commented Aug 24, 2022 at 21:23
Your question about Atari's BASIC using signed numbers makes me wonder if it might share lineage with VAX BASIC which also had a max of 32767. According to Wikipedia, VAX BASIC was based on DEC's BASIC-PLUS for the PDP-11 from 1972. DEC's manual ( archive.org/details/…) states the max line number is 32767.

hackerb9
– hackerb9

2022-08-24 21:29:09 +00:00
Commented Aug 24, 2022 at 21:29

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