jpp is J with (major feature) syntax sugar to simplify dsls/extensions with a preparser similar to (. ). sparked re-discussion. Any extension is (most) easily created by defining an adverb that is passed quoted text. Multiline definitions is one way to simplify quoting (with one level of embedded quotes), but jpp is another.
Advice regarding the (. ). proposal: make this just an alternative quoting delimiter. Its far more generally useful as quoting alternative than the narrow proposal. 5 : '...' does the "smart function" logic, but any adverb/function can process the resulting quote (. and ). can be paired with a simple ( or ).... as long as one side has the ".", it can close properly. This is a typing saver, and a further typing saver if you wish to use my auto-bracket completer. ________________________________ From: Erling Hellenäs <[email protected]> To: [email protected] Sent: Wednesday, September 27, 2017 5:28 AM Subject: Re: [Jprogramming] Tacit Expressions with Explicit J Syntax Hi all! I am not sure I understood this fully, but I understand that I could create a parser in J so that I could write explicit J code and get a tacit result. I just want it included in the J language. As we can see here, Jpp addresses another tacit J problem with the 'double/multi adverbs' extension: https://github.com/Pascal-J/jpp This problem is not that visible if not most of your code is chains of conjunctions, like in tacit J. Cheers, Erling Hellenäs On 2017-09-26 19:53, 'Pascal Jasmin' via Programming wrote: > jpp provides an easy way to embed quotes (though I could rethink/change order > of operations to simplify embedding) > > quotes is the essence of any dsl, but you/we want to avoid the tedium of > escaping quotes at many levels. > > in jpp, this expression contains an explicit definition within another > > x + (+: y bb. 3.. y bb. 4.. > > > 4 : 'x + ''+: y'' bb ( 3 : ) y' > > > x + (+: y bb. 3.. y bb. 4../2 3 > 'x + ''+: y'' bb ( 3 : ) y' bb ( 4 : ) / 2 3 > > 8 > > the remaining bb is harmless, though a better dsl parser might tunnel into > the dsl definition looking for specific sub-dsl definitions that is relevant > to it. > > Basically if you can make a tacit-v adverb that takes a string as parameter > (called say TV), then jpp lets you integrate it into J code with auto-quoting > and auto-paren balancing by calling it with TV. , or if it were a verb TV: > > > > quotes is the right delimiter compared to {} (due to existing J meaning of > those). Its a matter of reducing the annoyance of quotes IMO. It looks > like you want to compile your t-v expressions into J code, and jpp is suited > for this too. > > From: Erling Hellenäs <[email protected]> > To: [email protected] > Sent: Tuesday, September 26, 2017 7:26 AM > Subject: [Jprogramming] Tacit Expressions with Explicit J Syntax > > > > Hi all ! > > > I entered a request for tacit expressions with explicit J syntax. > > > http://code.jsoftware.com/wiki/System/Interpreter/Requests#Tacit_expressions_with_explicit_J_syntax > > > I use J only for fun so I am not going to finance development, but maybe > > others want to. As I see it it would solve most of the problems we > > struggle with daily since 20 years or something. > > > Cheers, > > > Erling Hellenäs > > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
