3 ms·

The problem with s-expressions is that you can’t include them within an already extant JSON schema.

mixedCase 5y ago
Yes you can, simply as a string. Here's your parsingMatrix from your other comment: { "if":[ { "or":[ { "===":[ { "var":"credentialData.rapidSarsCov2PCRTest.testResult" }, "negative" ] }, { "===":[ { "var":"credentialData.covid19Vaccination.hasVaccination" }, true ] } ] }, "valid", "invalid" ] } Here it is rewritten in a way more similar to how a human writes Lisp: { "if": [{"or": [{"===":[{ "var":"credentialData.rapidSarsCov2PCRTest.testResult" }, "negative" ]}, {"===":[{ "var":"credentialData.covid19Vaccination.hasVaccination" }, true ]}]}, "valid", "invalid"]}; Here it is as an s-expression, which you can store in a string: (if (or (= (var "credentialData.rapidSarsCov2PCRTest.testResult") "negative") (= (var "credentialData.covid19Vaccination.hasVaccination") #t)) "valid" "invalid") But, if you really have an intense hatred for adding an additional parsing step on top of the JSON, you can still improve over JsonLogic with just JSON primitives used in a cleaner way that more directly represents that s-expression. ["if", ["or", ["=", ["var", "credentialData.rapidSarsCov2PCRTest.testResult"], "negative"], ["=", ["var", "credentialData.covid19Vaccination.hasVaccination"], true]], "valid", "invalid"] It's still uglier than s-expressions where you can tell symbols and strings apart with more ease, but without all the syntactical noise of JSON objects combined with arrays.
- sebmellen 5y ago
  Thanks for the formatting, it's a lot better this way. I was using Prettier to make sure everything made sense as I a rather limited time to write the comment. Auto-formatting definitely comes with downsides... I guess that last example you demonstrated works, but I fail to see an appreciable advantage of using that over JsonLogic. It seems quite similar aside from being "cleaner," and comes with the disadvantages of not being as well defined a spec as JsonLogic. Really interesting though!

Yes you can, simply as a string. Here's your parsingMatrix from your other comment: { "if":[ { "or":[ { "===":[ { "var":"credentialData.rapidSarsCov2PCRTest.testResult" }, "negative" ] }, { "===":[ { "var":"credentialData.covid19Vaccination.hasVaccination" }, true ] } ] }, "valid", "invalid" ] } Here it is rewritten in a way more similar to how a human writes Lisp: { "if": [{"or": [{"===":[{ "var":"credentialData.rapidSarsCov2PCRTest.testResult" }, "negative" ]}, {"===":[{ "var":"credentialData.covid19Vaccination.hasVaccination" }, true ]}]}, "valid", "invalid"]}; Here it is as an s-expression, which you can store in a string: (if (or (= (var "credentialData.rapidSarsCov2PCRTest.testResult") "negative") (= (var "credentialData.covid19Vaccination.hasVaccination") #t)) "valid" "invalid") But, if you really have an intense hatred for adding an additional parsing step on top of the JSON, you can still improve over JsonLogic with just JSON primitives used in a cleaner way that more directly represents that s-expression. ["if", ["or", ["=", ["var", "credentialData.rapidSarsCov2PCRTest.testResult"], "negative"], ["=", ["var", "credentialData.covid19Vaccination.hasVaccination"], true]], "valid", "invalid"] It's still uglier than s-expressions where you can tell symbols and strings apart with more ease, but without all the syntactical noise of JSON objects combined with arrays.

sebmellen 5y ago
Thanks for the formatting, it's a lot better this way. I was using Prettier to make sure everything made sense as I a rather limited time to write the comment. Auto-formatting definitely comes with downsides... I guess that last example you demonstrated works, but I fail to see an appreciable advantage of using that over JsonLogic. It seems quite similar aside from being "cleaner," and comes with the disadvantages of not being as well defined a spec as JsonLogic. Really interesting though!