diff options
| -rw-r--r-- | json.lua | 7 |
1 files changed, 5 insertions, 2 deletions
@@ -17,8 +17,8 @@ object, encoded like so: `{"key1": 2, "key2": false}`. Because the Lua nil value cannot be a key, and as a table value is considerd equivalent to a missing key, there is no way to express the json "null" value in -a Lua table. The only way this will output "null" is if your entire input obj is -nil itself. +a Lua table. The json.null table can be used to encode the json "null" value. +{key=json.null} will be encoded to `{"key":null}`. An empty Lua table, {}, could be considered either a json object or array - it's an ambiguous edge case. We choose to treat this as an object as it is the @@ -51,6 +51,9 @@ local json = {} -- Internal functions. local function kind_of(obj) + if obj == json.null then + return 'nil' + end if type(obj) ~= 'table' then return type(obj) end local i = 1 for _ in pairs(obj) do |