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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

To |
<statalist@hsphsun2.harvard.edu> |

Subject |
st: RE: RE: RE: treatment of "$" in graphics text |

Date |
Sun, 23 May 2004 17:08:20 +0100 |

That's an interesting idea if I understand it correctly. Ben is suggesting that instead of passing `0', which contains what the user typed after the command line, from calling program to called program, programmers should pass `macval(0)'. In other words, what was specified on the command line is protected against interpretation. This recommendation not only would oblige Stata programmers to change a lot of code, just in case the macro contains a literal $, but would also seem to presuppose that only at some lowest level would the macval() be ignored, i.e. there is some innermost code which checks what was typed for syntax. In the case of graphing code, at least, that presupposition appears to be generally wrong. The contents of `0' have to be unpacke; they are not passed from program to program like a baton in a relay race. Conversely, if only the innermost program is allowed to peek at `0', it will have, I guess, have to do all the work, as the the others are just transporters. Nick n.j.cox@durham.ac.uk > -----Original Message----- > From: owner-statalist@hsphsun2.harvard.edu > [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Jann, Ben > Sent: 22 May 2004 21:53 > To: statalist@hsphsun2.harvard.edu > Subject: st: RE: RE: treatment of "$" in graphics text > > > Nick wrote: > > > So, in order to get past the guard dogs, > > Agent Ryan, you need a sausage for every dog. Whether there > > is a clever way of nesting \$ I don't know, but I > > doubt it, and in any case that would be an impractical > > strategy, as you would have to know _exactly_ how many sausages > > were needed, or more prosaically how many times your code would > > get interpreted: with the new graphics' deeply nested > > structure, not just of ados but also of class-based > > stuff, goodness knows what the answer is. > > This is not really a problem of the nesting. That is, from a > user's perspective it should not be. I think, that the nesting > structure of the underlying commands should be irrelevant for > the users and that the graph commands schould be fixed! > (i.e. the strings should only be interpreted once and passed > through using macval() thereafter. I don't see why this would > not be possible.) > > ben > > * > * For searches and help try: > * http://www.stata.com/support/faqs/res/findit.html > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ > * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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