Looks great - eagerly awaiting a chance to use it. Alan
On Mon, May 23, 2016 at 7:48 AM, <adrian.med...@mail.yu.edu> wrote: > This looks incredible and it sounds like something which could immediately > be put to good use in both hobby and production projects. Excited to test > it out when the alpha is available. Thank you! > > > On Monday, May 23, 2016 at 10:12:29 AM UTC-4, Rich Hickey wrote: >> >> Introducing clojure.spec >> >> I'm happy to introduce today clojure.spec, a new core library and support >> for data and function specifications in Clojure. >> >> Better communication >> >> Clojure is a dynamic language, and thus far we have relied on >> documentation or external libraries to explain the use and behavior of >> functions and libraries. But documentation is difficult to produce, is >> frequently not maintained, cannot be automatically checked and varies >> greatly in quality. Specs are expressive and precise. Including spec in >> Clojure creates a lingua franca with which we can state how our programs >> work and how to use them. >> >> More leverage and power >> >> A key advantage of specifications over documentation is the leverage they >> provide. In particular, specs can be utilized by programs in ways that docs >> cannot. Defining specs takes effort, and spec aims to maximize the return >> you get from making that effort. spec gives you tools for leveraging specs >> in documentation, validation, error reporting, destructuring, >> instrumentation, test-data generation and generative testing. >> >> Improved developer experience >> >> Error messages from macros are a perennial challenge for new (and >> experienced) users of Clojure. specs can be used to conform data in macros >> instead of using a custom parser. And Clojure's macro expansion will >> automatically use specs, when present, to explain errors to users. This >> should result in a greatly improved experience for users when errors occur. >> >> More robust software >> >> Clojure has always been about simplifying the development of robust >> software. In all languages, dynamic or not, tests are essential to quality >> - too many critical properties are not captured by common type systems. >> spec has been designed from the ground up to directly support generative >> testing via test.check https://github.com/clojure/test.check. When you >> use spec you get generative tests for free. >> >> Taken together, I think the features of spec demonstrate the ongoing >> advantages of a powerful dynamic language like Clojure for building robust >> software - superior expressivity, instrumentation-enhanced REPL-driven >> development, sophisticated testing and more flexible systems. I encourage >> you to read the spec rationale and overview >> http://clojure.org/about/spec. Look for spec's inclusion in the next >> alpha release of Clojure, within a day or so. >> >> Note that spec is still alpha, and some details are likely to change. >> Feedback welcome. >> >> I hope you find spec useful and powerful! >> >> Rich >> >> -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
