Compile-time JSON syntax checking in Rapture JSON

repl.scala

Welcome to Scala version 2.10.4 (OpenJDK 64-Bit Server VM, Java 1.6.0_27).
Type in expressions to have them evaluated.
Type :help for more information.

scala> import rapture.json._
import rapture.json._

scala> import jsonBackends.scalaJson._
import jsonBackends.scalaJson._

scala> json"{}"
res0: rapture.json.Json = {}

scala> json"""{ "foo"; "bar" }"""
<console>:14: error: Expected ':', but found ';'
       json"""{ "foo"; "bar" }"""
                     ^

scala> json"""{ "foo": "bar")"""
<console>:14: error: Expected ',' or '}', but found ')'
       json"""{ "foo": "bar")"""
                            ^

scala> json"""{ "foo": "bar", }"""
<console>:14: error: Expected '"', but found '}'
       json"""{ "foo": "bar", }"""
                              ^

scala> json"""{ "foo": ${2 + 2} }"""
res5: rapture.json.Json = {"foo":4}

scala> json"""{ "foo": ${2 + 2}, "bar": * }"""
<console>:14: error: Expected new token, but found '*'
       json"""{ "foo": ${2 + 2}, "bar": * }"""
                                        ^

scala> json"""{ ${2 + 2}: "foo", "bar": * }"""
<console>:14: error: Expected '"' or '}', but found interpolated value
       json"""{ ${2 + 2}: "foo", "bar": * }"""
                ^

JSON literals will now get parsed at compile time.

Cool!

Nice!