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Merge pull request #3829 from def-/json-fix-empty

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Fix json.`%*` for empty objects
This commit is contained in:
Andreas Rumpf
2016-02-06 08:16:56 +01:00
parent 4610cb3ae9 11f055c652
commit 86b233dff9
1 changed files with 7 additions and 3 deletions
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10
lib/pure/json.nim
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@@ -712,17 +712,21 @@ proc `%`*(elements: openArray[JsonNode]): JsonNode =
proc toJson(x: NimNode): NimNode {.compiletime.} =
case x.kind
of nnkBracket:
of nnkBracket: # array
result = newNimNode(nnkBracket)
for i in 0 .. <x.len:
result.add(toJson(x[i]))
of nnkTableConstr:
of nnkTableConstr: # object
result = newNimNode(nnkTableConstr)
for i in 0 .. <x.len:
assert x[i].kind == nnkExprColonExpr
x[i].expectKind nnkExprColonExpr
result.add(newNimNode(nnkExprColonExpr).add(x[i][0]).add(toJson(x[i][1])))
of nnkCurly: # empty object
result = newNimNode(nnkTableConstr)
x.expectLen(0)
else:
result = x