fixes json.nim regression

lib/pure/json.nim

@@ -390,18 +390,10 @@ proc `[]=`*(obj: JsonNode, key: string, val: JsonNode) {.inline.} =
   assert(obj.kind == JObject)
   obj.fields[key] = val
 
-proc `%`*[T: tuple|object](o: T): JsonNode =
+proc `%`*[T: object](o: T): JsonNode =
   ## Construct JsonNode from tuples and objects.
-  ##
-  ## If passed an anonymous tuple, creates `JArray JsonNode`,
-  ## otherwise (named tuples and objects) `JObject JsonNode`.
-  const isNamed = T is object or isNamedTuple(T)
-  when isNamed:
   result = newJObject()
   for k, v in o.fieldPairs: result[k] = %v
-  else:
-    result = newJArray()
-    for a in o.fields: result.add(%a)
 
 proc `%`*(o: ref object): JsonNode =
   ## Generic constructor for JSON data. Creates a new `JObject JsonNode`
@@ -1718,7 +1710,6 @@ when isMainModule:
 
   # Test loading of file.
   when not defined(js):
-    echo("99% of tests finished. Going to try loading file.")
     var parsed = parseFile("tests/testdata/jsontest.json")
 
     try:
@@ -1752,6 +1743,8 @@ when isMainModule:
   doAssert($ %*[] == "[]")
   doAssert($ %*{} == "{}")
 
+  doAssert(not compiles(%{"error": "No messages"}))
+
   # bug #9111
   block:
     type

tests/stdlib/tjsonmacro.nim

@@ -517,10 +517,6 @@ when true:
       doAssert v.name == "smith"
       doAssert MyRef(w).name == "smith"
 
-    block test_tuple:
-      doAssert $(%* (a1: 10, a2: "foo")) == """{"a1":10,"a2":"foo"}"""
-      doAssert $(%* (10, "foo")) == """[10,"foo"]"""
-
 # TODO: when the issue with the limeted vm registers is solved, the
 # exact same test as above should be evaluated at compile time as
 # well, to ensure that the vm functionality won't diverge from the