49 lines
1.3 KiB
Nim
49 lines
1.3 KiB
Nim
## Fixes an underlying Exception caused by missing forward declarations for
|
|
## `std/json.JsonNode.hash`, eg when using `JsonNode` as a `Table` key. Adds
|
|
## {.raises: [].} for proper exception tracking. Copied from the std/json module
|
|
|
|
import pkg/serde
|
|
import std/hashes
|
|
|
|
{.push raises:[].}
|
|
|
|
when (NimMajor) >= 2:
|
|
proc hash*[A](x: openArray[A]): Hash =
|
|
## Efficient hashing of arrays and sequences.
|
|
## There must be a `hash` proc defined for the element type `A`.
|
|
when A is byte:
|
|
result = murmurHash(x)
|
|
elif A is char:
|
|
when nimvm:
|
|
result = hashVmImplChar(x, 0, x.high)
|
|
else:
|
|
result = murmurHash(toOpenArrayByte(x, 0, x.high))
|
|
else:
|
|
for a in x:
|
|
result = result !& hash(a)
|
|
result = !$result
|
|
|
|
func hash*(n: OrderedTable[string, JsonNode]): Hash
|
|
|
|
func hash*(n: JsonNode): Hash =
|
|
## Compute the hash for a JSON node
|
|
case n.kind
|
|
of JArray:
|
|
result = hash(n.elems)
|
|
of JObject:
|
|
result = hash(n.fields)
|
|
of JInt:
|
|
result = hash(n.num)
|
|
of JFloat:
|
|
result = hash(n.fnum)
|
|
of JBool:
|
|
result = hash(n.bval.int)
|
|
of JString:
|
|
result = hash(n.str)
|
|
of JNull:
|
|
result = Hash(0)
|
|
|
|
func hash*(n: OrderedTable[string, JsonNode]): Hash =
|
|
for key, val in n:
|
|
result = result xor (hash(key) !& hash(val))
|
|
result = !$result |