JsonObject¶

Immutable JSON object backed by a persistent hash map.

Construction is via chained .update() calls, each returning a new object with structural sharing:

let obj = JsonObject
  .update("name", "Alice")
  .update("age", I64(30))

class val JsonObject is
  Stringable box

Implements¶

Stringable box

Constructors¶

create¶

[Source]

new val create(
  data': Map[String val, JsonValue] = qualify)
: JsonObject val^

Parameters¶

data': Map[String val, JsonValue] = qualify

Returns¶

JsonObject val^

Public Functions¶

apply¶

[Source]

Look up a value by key. Raises if key is not present.

fun box apply(
  key: String val)
: JsonValue ?

Parameters¶

key: String val

Returns¶

JsonValue ?

get_or_else¶

[Source]

Look up a value by key, returning default if absent.

fun box get_or_else(
  key: String val,
  default: JsonValue)
: JsonValue

Parameters¶

key: String val
default: JsonValue

Returns¶

JsonValue

contains¶

[Source]

Check whether a key is present.

fun box contains(
  key: String val)
: Bool val

Parameters¶

key: String val

Returns¶

Bool val

size¶

[Source]

Number of key-value pairs.

fun box size()
: USize val

Returns¶

USize val

update¶

[Source]

Return a new object with the key set to value.

fun box update(
  key: String val,
  value: JsonValue)
: JsonObject val

Parameters¶

key: String val
value: JsonValue

Returns¶

JsonObject val

remove¶

[Source]

Return a new object without the given key. No-op if key is absent.

fun box remove(
  key: String val)
: JsonObject val

Parameters¶

key: String val

Returns¶

JsonObject val

keys¶

[Source]

Iterate over keys.

fun box keys()
: MapKeys[String val, JsonValue, HashEq[String val] val] ref

Returns¶

MapKeys[String val, JsonValue, HashEq[String val] val] ref

values¶

[Source]

Iterate over values.

fun box values()
: MapValues[String val, JsonValue, HashEq[String val] val] ref

Returns¶

MapValues[String val, JsonValue, HashEq[String val] val] ref

pairs¶

[Source]

Iterate over (key, value) pairs.

fun box pairs()
: MapPairs[String val, JsonValue, HashEq[String val] val] ref

Returns¶

MapPairs[String val, JsonValue, HashEq[String val] val] ref

string¶

[Source]

Compact JSON serialization.

fun box string()
: String iso^

Returns¶

String iso^

pretty_string¶

[Source]

Pretty-printed JSON serialization.

fun box pretty_string(
  indent: String val = "  ")
: String iso^

Parameters¶

indent: String val = " "

Returns¶

String iso^