Re: st: syntax and gettoken with parentheses and equal signs

[Nick Winter <njgwinter@gmail.com>]

Another approach from those already suggested:  by looking in 
-ivregress.ado-, I see that the relevant parsing is handled by 
-_ivparse.ado-.

So you could either borrow the code from _ivparse.ado, or, perhaps, just 
call that program as-is to do your parsing.

- Nick

On 3/27/2014 9:15 AM, Eric Lewis wrote:
> Dear Statalist
>
> I am trying to write an IV-type estimator that allows for parentheses
> (for the first stage regression). I understand that gettoken with the
> "bind" option can help with parentheses. However I am having a hard
> time implementing that in practice. How can I use gettoken and/or
> syntax in this setting?
>
> e.g., I want a program that can define the macros lhs, exog, endog,
> and inst based on arguments and the position of parentheses and the
> equal sign.
>
>
> program test_parentheses
>       * example syntax y z1 z2 z3 (x1 x2 = z4 z5)
>
>      * syntax and/or gettoken code:
>       . . .
>
>      display "`lhs'"
>            * displays y
>       display "`exog'"
>            * displays z1 z2 z3
>       display "`endog'"
>            * displays x1 x2
>       display "`inst'"
>            * displays z4 z5
> end
>
> Currently I am taking the easy way out and using many options:
> syntax [if] [in], lhs(varname) exog(varlist) endog(varlist) inst(varlist)
>
> Thank you,
> Eric
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