JSON

The runtime can serialize values to JSON and parse JSON strings back into var values.

#include "abscom/abs.h"

API

Function	Description
var json_dump(var obj)	Serialize any value to a JSON string.
var json_parse(const char *json_str)	Parse a JSON C-string into a value.

Dumping

abs_init();

var d = Dict();
dset(d, "name", abs_new_str("Ada"));
dset(d, "age",  v(36));
dset(d, "scores", range(0, 3));          /* [0, 1, 2] */

print(json_dump(d));
/* {"age":36,"name":"Ada","scores":[0,1,2]} */

Formatting rules: - Ints and floats are unquoted; floats use full precision (%.17g). - Strings are double-quoted and escaped (\n, \", etc.). - None becomes null, bools become true/false. - Lists and sets become arrays; dicts become objects.

Parsing

var d = json_parse("{\"name\":\"Ada\",\"age\":36}");

print(dget(d, "name"));   /* Ada */
print(dget(d, "age"));    /* 36  */

The parser produces the equivalent var objects for objects, arrays, strings, numbers, booleans, and null. Unparseable input (or trailing garbage after the value) returns an ABS_ERROR.

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