This page is part of the web mail archives of SRFI 37 from before July 7th, 2015. The new archives for SRFI 37 contain all messages, not just those from before July 7th, 2015.
> I feel somewhat passionately for GNU/POSIX-style command-line > processing. After a few weeks' absence from PLT Scheme, I usually > have to read the docs to actually believe they've done this > differently from everyone else. I find PLT's way of doing things > unnecessarily hard to remember. On PLT: Where our library differs from Posix, it's mostly a result of ignorance. I wrote the library 5 years ago, and at that time I searched the web and consulted as many people as I could. Matching a standard (any standard!) was a priority. I was under the misimpression that we has succeeded. I, too, feel strongly about argument parsing --- and I've called Apple bad names because they completely ignored Posix conventions for OS X tools. I guess I have to stop that, now. I don't think that PLT's (lib "cmdline.ss") needs to be implemented with SRFI-37 or vice-versa, but I am certainly interested in having a consistent parsing. Allowing an "=" between a long-argument name and its first argument is easy and backward-compatible. I have some issues and questions with other changes. On parsing multiple flag arguments: I still feel free to call Microsoft bad names. The Windows implementors ignored the Unix argv experience, and Windows instead provides a single command-line string that an application must parse. Parsers differ, and many applications get either command-line construction or parsing wrong. (How many times have you seen an app trip over a path with a space in it? I still see it all the time.) I mention this because it seems like employing " " or "," as a flag-argument delimitter (e.g., for -L in MzScheme) would be making that same mistake again. But Posix also has experience behind it, so what am I missing? On combining a flag and its argument: The other troublesome change for us would be allowing a flag's argument to be combined with the flag (i.e., leaving out the space). This seems to be a deprecated convention. (Posix guideline 6 says "don't do it, but you can if you want". The SRFI says "for historical reasons".) Is there strong support for continuing it? The SRFI seems to depart from both Posix and GNU (as documented) in allowing multiple flag names to follow "-" *and* argument without a space for the last flag. Is that actually supported by GNU, and/or am I overlooking something in the Posix guidelines? Matthew