Re: Mathematica commenting of code using (* *) can't be nested
- To: mathgroup at smc.vnet.net
- Subject: [mg84986] Re: Mathematica commenting of code using (* *) can't be nested
- From: David <habud at hotmail.com>
- Date: Tue, 22 Jan 2008 01:50:25 -0500 (EST)
- References: <200801191101.GAA18691@smc.vnet.net> <47921293.1000102@math.umass.edu> <fmv0u4$2hb$1@smc.vnet.net>
Nasser Abbasi wrote: > ----- Original Message ----- > From: "Murray Eisenberg" <murray at math.umass.edu> > > >> Without a second right-end *) to match, I think this should obviously be >> treated as a syntax error. >> > > I think Mathematica is free to have its language rules of course, I was just > commenting because that is NOT how other languages normally treats comments > that has an opening and closing tokens. > > Once a comment is started, everything in from of it is ignored until the > comment is closed. > > This works in C: /* comment /* still inside a commant */ > This work in C++: // comment // still inside a commant // > This does NOT work in Mathematica (* comment (* still inside a comment > *) Your comparing a compiled language with an interpreted lanquage. C has other mechanisms for preprocessing sections of code that Mathematica doesn't have. And, your C++ example "//" is only a single line comment. That doesn't compare (apples-to-apples) with a block comment like "(*...*)". For example: What if you have a code fragment that is within another code fragment? (* Code Fragment 1: Module[ .... (* Code Fragment 1.1: Module[ ... ] *) *) I can uncomment either fragment without parsing issues. With your implementation, that wouldn't be possible. I think Mathematica's implementation is perfectly logical. > > Nasser > >
- References:
- Mathematica commenting of code using (* *) can't be nested well.
- From: "Nasser Abbasi" <nma@12000.org>
- Mathematica commenting of code using (* *) can't be nested well.