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Re: st: RE: Macros half-evaluation


From   "Sergiy Radyakin" <serjradyakin@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: Macros half-evaluation
Date   Mon, 20 Aug 2007 15:33:35 -0400

Thank you Nick, -macvalue- was exactly what I needed.
Best regards, Sergiy



On 8/20/07, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> -macval()- may be what you are looking for.
> See help on -macro-.
>
> Otherwise postpone evaluation by using a
> -char()- call for the left quote.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Sergiy Radyakin
>
> > I have a dialog form, and an EDIT control on that form contains a
> > string with possibly local macros embedded in it. E.g.
> >
> > "Text `alpha' other text"
> >
> > I need to save/read the contents of this field to/from text file.
> > If I save the value directly, e.g.
> >
> > file write ConfigFile `" `"`.my_dlg.main.fi_save.value'"' "'  _n
> >
> > , the macro, which is contained in the value is evaluated and the
> > result of that is saved.
> >
> > If I preclude evaluation with a " \ ",
> > file write ConfigFile `" `"\`.my_dlg.main.fi_save.value'"' "'  _n
> > then I have
> >      `.my_dlg.main.fi_save.value'
> > in my file, which will be evaluated when the file is to be read (which
> > is wrong).
> > So how do I tell Stata, that the string that I want to save is the
> > VALUE of an EDIT control (equally applies to all other controls and
> > string properties) taken AS-IS with all locals left unevaluated? Note
> > that
> > classutil des .my_dlg.main.fi_save.value
> > also shows the evaluated value, rather than the "contents" of
> > the field
> >
> > For those who do not want to deal with the dialogs, here is a similar
> > problem with locals:
> >
> > local b "bar"
> > local f `"foo \`b'"' // Have to preclude with \
> > di `"f is:`f'"'
> > di `"b is:`b'"'
> > di `"\f is:\`f'"'
> > di `"\b is:\`b'"'
> > local c "`f'"
> > di `"c is:`c'"'
> > // I want to see: foo `b'
> >
> > Any ideas how can I get the contents of the macro in this way without
> > all macros that it contains being evaluated?
>
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