Re: [TCLCORE] ***CAUTION_Invalid_Partial_Signature*** [Ext] Re: Fwd: TIP 672 Implementation Complete - Ready for Sponsorship

[Colin M. <col...@ya...>]

The updated prototype I posted yesterday handles this.

On 03/11/2025 07:19, Zaumseil René wrote:
>
> Just do a "string map {{ } {}} .." at first.
>
> *Von:*Pietro Cerutti via Tcl-Core <tcl...@li...>
> *Gesendet:* Sonntag, 2. November 2025 09:05
> *An:* Colin Macleod <col...@ya...>
> *Cc:* tcl...@li...; av...@lo...
> *Betreff:* ***CAUTION_Invalid_Partial_Signature*** [Ext] Re: [TCLCORE] 
> Fwd: TIP 672 Implementation Complete - Ready for Sponsorship
>
> How does it handle a space between a mathfunc and its parenthesized 
> argument list?
>
> % expr {sin (12)}
>
> -0.5365729180004349
>
> -- 
>
> Pietro Cerutti
>
> I've pledged to give 10% of income to effective charities and invite 
> you to join me.
>
> https://givingwhatwecan.org
>
> Sent from a small device - please excuse brevity and typos.
>
>
>
>     On 1 Nov 2025, at 17:50, Colin Macleod via Tcl-Core
>     <tcl...@li...> wrote:
>
>     
>
>     On 30/10/2025 01:18, Andreas Leitgeb wrote:
>
>            - [= ...] with a modified expr-language using barewords as variable
>
>              names would probably solve many (if not most) of the cases, where
>
>              [expr {...}] really "hurts" for its verbosity.
>
>     Here is a pure Tcl implementation of that:
>
>         proc = args {
>             set ex [join $args]
>             set exp [regsub -all
>         {(::)?[[:alpha:]]([[:alnum:]_]|::)*([^[:alnum:]_(]|$)} $ex {$&}]
>             uplevel expr $exp
>         }
>
>     This just finds all the possible variable names in the expression,
>     prefixes them with $ and then runs expr on the result.  The regex
>     is a little complicated because:
>
>       * The variable name could include :: at the beginning or in the
>         middle for namespacing.
>       * We disallow single colon : within the name because that
>         creates ambiguity with the ternary operator ?: .
>       * We also disallow array references because we can't distinguish
>         them from mathfunc calls.
>
>     The fact that this can be implemented in pure Tcl shows that it
>     doesn't require any change to the dodekalogue rules, and so there
>     is no consequence for subst either.
>
>     Of course a real implementation should be done in C.  It could
>     then also be possible to implement the extension Kevin Kenny
>     suggested of adding `=` as an assignment operator as in C within
>     an expression, and perhaps even chaining multiple assignments with
>     `,` .
>
>     I saw the `expr` question is on the agenda for the call on
>     Monday.  I don't usually join these calls but I would join it for
>     this issue except that I have an urgent dentist's appointment at
>     that time.  Perhaps I should create a new TIP for this proposal?
>
>     Colin.
>
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