zuzu-rust 0.4.0

Rust implementation of ZuzuScript
Documentation 
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from std/data/json import *;
from test/more import *;
let j := new JSON( pretty: false, canonical: true );
is( j.encode( [ 1, 2, 3 ] ), "[1,2,3]", "j.encode" );
is( j.decode("[1,2,3]"), [ 1, 2, 3 ], "j.decode" );
is( j.encode( {foo:1,bar:2} ), "{\"bar\":2,\"foo\":1}", "canonical" );
ok( j.encode_binarystring( [ 1, 2, 3 ] ) instanceof BinaryString, "encode_binarystring returns BinaryString" );
is( to_string( j.encode_binarystring( [ 1, 2, 3 ] ) ), "[1,2,3]", "encode_binarystring emits UTF-8 JSON bytes" );
is( j.decode_binarystring( to_binary("[1,2,3]") ), [ 1, 2, 3 ], "decode_binarystring decodes JSON bytes" );
is( j.decode_binarystring( to_binary("[{\"letter\":\"π\"}]") )[0]{letter}, "π", "decode_binarystring decodes literal UTF-8 JSON" );

let nested := {{
	foo: 1,
	foo: 2,
	bar: << 3, 2, 1 >>,
	baz: <<< 3, 2, 1, 1 >>>,
}};
let simpler := {{
	foo: 1,
	foo: 2,
	bar: [ 1, 2, 3 ],
	baz: [ 1, 1, 2, 3 ],
}};
is( j.encode(nested), j.encode(simpler), "JSON encodes PairList, Set, and Bag as expected", );

unlike( j.encode(nested), /list/, "PairList encoded as plain JSON object" );

is( j.decode(j.encode(nested)).keys, << "foo", "bar", "baz" >>, "PairList keys not roundtripped by default", );
let j2 := new JSON( pairlists: true );
is( j2.decode(j2.encode(nested)).keys, [ "foo", "foo", "bar", "baz" ], "PairList keys roundtripped with pairlists:true option", );

done_testing();