spl/stage2/utils/json.spl

// Expect retcode = 0
// 轻量 JSON 解析 / 输出器（递归下降 + 节点池），用于验证底层库的拼装，未来服务 LSP。
// 设计：
//   - 输入 ByteView，字符串/数字以“源切片”借用，不做解码，round-trip 保真；
//   - 节点池 Vec[JsonNode]；数组/对象子项存 Vec[JsonChild]，保留插入顺序；
//   - 错误带字节位置（error.spl）；输出写 ByteBuffer；缩进/数字用 ByteBuffer/fmt。
// 限制：不做字符串转义解码、无递归深度保护、数字不做数值化（原样保存）。

type .{ .Error, .Status, .make, .at } = @import("error.spl");
type .{ .ByteView, .ViewResult, .FindResult } = @import("byte_view.spl");
type .{ .Vec } = @import("vec.spl");
type .{ .ByteBuffer } = @import("byte_buffer.spl");
type .{ .is_digit, .is_hex_digit, .is_space } = @import("ascii.spl");
type .{ .append_i64, .append_u64 } = @import("fmt.spl");

type JsonKind = enum {
    Null,
    True,
    False,
    Number,
    String,
    Array,
    Object,
}

// 数组元素或对象成员。数组时 key 为空视图；对象时 key 为源中的原始键文本。
type JsonChild = struct {
    key: ByteView,
    val: usize,
}

type JsonNode = struct {
    kind: JsonKind,
    text: ByteView,
    children: Vec,
}

// 解析结果文档：nodes 拥有全部节点；root 为根节点下标。
type Json = struct {
    nodes: Vec,
    root: usize,
}

type JsonResult = enum {
    Ok: Json,
    Err: Error,
}

type NodeResult = enum {
    Ok: usize,
    Err: Error,
}

type Parser = struct {
    src: ByteView,
    pos: usize,
    nodes: Vec,
}

fn blank_node(kind: JsonKind): JsonNode {
    ret JsonNode {
        .kind = kind,
        .text = ByteView.empty(),
        .children = Vec.blank(@sizeof(JsonChild), 8),
    };
}

fn intern_node(p: *Parser, node: JsonNode): NodeResult {
    var index = p.nodes.len;
    var n = node;
    match Vec.push(&p.nodes, &n as *u8) {
        .Ok => {},
        .Err(error) => { ret .Err(error); },
    }
    ret .Ok(index);
}

fn node_at(doc: *Json, index: usize): *JsonNode {
    match Vec.get(&doc.nodes, index) {
        .Ok(ptr) => { ret ptr as *JsonNode; },
        .Err(error) => { ret null; },
    }
    ret null;
}

fn skip_ws(p: *Parser) {
    while p.pos < p.src.len && is_space(p.src.ptr[p.pos]) {
        p.pos = p.pos + 1;
    }
}

// -1 表示 EOF。
fn peek(p: *Parser): i32 {
    if p.pos >= p.src.len { ret -1; }
    ret p.src.ptr[p.pos] as i32;
}

fn parse_string_raw(p: *Parser): ViewResult {
    if peek(p) != 34 { ret .Err(at(.InvalidFormat, p.pos)); }
    p.pos = p.pos + 1;
    var start = p.pos;
    while p.pos < p.src.len {
        var c = p.src.ptr[p.pos];
        if c == 34 { break; }
        if c == 92 { // '\\'
            p.pos = p.pos + 1;
            if p.pos >= p.src.len { ret .Err(at(.UnexpectedEnd, p.pos)); }
            if p.src.ptr[p.pos] == 117 { // 'u'
                var k: usize = 0;
                while k < 4 {
                    p.pos = p.pos + 1;
                    if p.pos >= p.src.len { ret .Err(at(.UnexpectedEnd, p.pos)); }
                    if !is_hex_digit(p.src.ptr[p.pos]) { ret .Err(at(.InvalidDigit, p.pos)); }
                    k = k + 1;
                }
            }
        } else if c < 32 {
            ret .Err(at(.InvalidFormat, p.pos));
        }
        p.pos = p.pos + 1;
    }
    if p.pos >= p.src.len { ret .Err(at(.UnexpectedEnd, p.pos)); }
    var end = p.pos;
    p.pos = p.pos + 1; // 收尾引号
    ret ByteView.slice(p.src, start, end);
}

fn parse_literal(p: *Parser, word: []u8, kind: JsonKind): NodeResult {
    var i: usize = 0;
    while i < word.len {
        if p.pos + i >= p.src.len { ret .Err(at(.UnexpectedEnd, p.src.len)); }
        if p.src.ptr[p.pos + i] != word.ptr[i] {
            ret .Err(at(.InvalidFormat, p.pos + i));
        }
        i = i + 1;
    }
    p.pos = p.pos + word.len;
    var node = blank_node(kind);
    ret intern_node(p, node);
}

fn parse_number(p: *Parser): NodeResult {
    var start = p.pos;
    if peek(p) == 45 { p.pos = p.pos + 1; } // '-'
    if p.pos >= p.src.len || !is_digit(p.src.ptr[p.pos]) {
        ret .Err(at(.InvalidDigit, p.pos));
    }
    if p.src.ptr[p.pos] == 48 { // 前导 0 后面不能接数字
        p.pos = p.pos + 1;
    } else {
        while p.pos < p.src.len && is_digit(p.src.ptr[p.pos]) {
            p.pos = p.pos + 1;
        }
    }
    if p.pos < p.src.len && p.src.ptr[p.pos] == 46 { // '.'
        p.pos = p.pos + 1;
        if p.pos >= p.src.len || !is_digit(p.src.ptr[p.pos]) {
            ret .Err(at(.InvalidDigit, p.pos));
        }
        while p.pos < p.src.len && is_digit(p.src.ptr[p.pos]) {
            p.pos = p.pos + 1;
        }
    }
    if p.pos < p.src.len && (p.src.ptr[p.pos] == 101 || p.src.ptr[p.pos] == 69) { // e/E
        p.pos = p.pos + 1;
        if p.pos < p.src.len && (p.src.ptr[p.pos] == 43 || p.src.ptr[p.pos] == 45) {
            p.pos = p.pos + 1;
        }
        if p.pos >= p.src.len || !is_digit(p.src.ptr[p.pos]) {
            ret .Err(at(.InvalidDigit, p.pos));
        }
        while p.pos < p.src.len && is_digit(p.src.ptr[p.pos]) {
            p.pos = p.pos + 1;
        }
    }

    var text = ByteView.slice(p.src, start, p.pos);
    match text {
        .Ok(v) => {
            var node = blank_node(.Number);
            node.text = v;
            ret intern_node(p, node);
        },
        .Err(error) => { ret .Err(error); },
    }
}

fn parse_array(p: *Parser): NodeResult {
    p.pos = p.pos + 1; // '['
    var kids = Vec.blank(@sizeof(JsonChild), 8);

    skip_ws(p);
    if peek(p) == 93 { // ']'
        p.pos = p.pos + 1;
        var empty = blank_node(.Array);
        empty.children = kids;
        ret intern_node(p, empty);
    }

    while true {
        var element = parse_value(p);
        var index: usize = 0;
        match element {
            .Ok(v) => { index = v; },
            .Err(error) => { Vec.drop(&kids); ret .Err(error); },
        }
        var child = JsonChild { .key = ByteView.empty(), .val = index };
        match Vec.push(&kids, &child as *u8) {
            .Ok => {},
            .Err(error) => { Vec.drop(&kids); ret .Err(error); },
        }

        skip_ws(p);
        var c = peek(p);
        if c == 44 { // ','
            p.pos = p.pos + 1;
            continue;
        }
        if c == 93 { // ']'
            p.pos = p.pos + 1;
            break;
        }
        Vec.drop(&kids);
        ret .Err(at(.InvalidFormat, p.pos));
    }

    var node = blank_node(.Array);
    node.children = kids;
    ret intern_node(p, node);
}

fn parse_object(p: *Parser): NodeResult {
    p.pos = p.pos + 1; // '{'
    var kids = Vec.blank(@sizeof(JsonChild), 8);

    skip_ws(p);
    if peek(p) == 125 { // '}'
        p.pos = p.pos + 1;
        var empty = blank_node(.Object);
        empty.children = kids;
        ret intern_node(p, empty);
    }

    while true {
        skip_ws(p);
        var key_view = ByteView.empty();
        match parse_string_raw(p) {
            .Ok(v) => { key_view = v; },
            .Err(error) => { Vec.drop(&kids); ret .Err(error); },
        }

        skip_ws(p);
        if peek(p) != 58 { // ':'
            Vec.drop(&kids);
            ret .Err(at(.InvalidFormat, p.pos));
        }
        p.pos = p.pos + 1;

        var value = parse_value(p);
        var index: usize = 0;
        match value {
            .Ok(v) => { index = v; },
            .Err(error) => { Vec.drop(&kids); ret .Err(error); },
        }

        var child = JsonChild { .key = key_view, .val = index };
        match Vec.push(&kids, &child as *u8) {
            .Ok => {},
            .Err(error) => { Vec.drop(&kids); ret .Err(error); },
        }

        skip_ws(p);
        var c = peek(p);
        if c == 44 { // ','
            p.pos = p.pos + 1;
            continue;
        }
        if c == 125 { // '}'
            p.pos = p.pos + 1;
            break;
        }
        Vec.drop(&kids);
        ret .Err(at(.InvalidFormat, p.pos));
    }

    var node = blank_node(.Object);
    node.children = kids;
    ret intern_node(p, node);
}

fn parse_value(p: *Parser): NodeResult {
    skip_ws(p);
    var c = peek(p);
    if c < 0 { ret .Err(at(.UnexpectedEnd, p.pos)); }
    var ch = c as u8;

    if ch == 34 { // '"'
        var view = ByteView.empty();
        match parse_string_raw(p) {
            .Ok(v) => { view = v; },
            .Err(error) => { ret .Err(error); },
        }
        var node = blank_node(.String);
        node.text = view;
        ret intern_node(p, node);
    }
    if ch == 123 { ret parse_object(p); } // '{'
    if ch == 91 { ret parse_array(p); }   // '['
    if ch == 116 { ret parse_literal(p, "true", .True); }
    if ch == 102 { ret parse_literal(p, "false", .False); }
    if ch == 110 { ret parse_literal(p, "null", .Null); }
    ret parse_number(p);
}

fn drop_node_pool(pool: *Vec) {
    var i: usize = 0;
    while i < pool.*.len {
        match Vec.get(pool, i) {
            .Ok(ptr) => {
                var n = ptr as *JsonNode;
                Vec.drop(&n.children);
            },
            .Err(error) => {},
        }
        i = i + 1;
    }
    Vec.drop(pool);
}

fn parse(src: ByteView): JsonResult {
    var p = Parser {
        .src = src,
        .pos = 0,
        .nodes = Vec.blank(@sizeof(JsonNode), 8),
    };

    skip_ws(&p);
    var root: usize = 0;
    var result = parse_value(&p);
    match result {
        .Ok(index) => { root = index; },
        .Err(error) => {
            drop_node_pool(&p.nodes);
            ret .Err(error);
        },
    }

    skip_ws(&p);
    if p.pos != src.len {
        drop_node_pool(&p.nodes);
        ret .Err(at(.InvalidFormat, p.pos));
    }

    ret .Ok(Json { .nodes = p.nodes, .root = root });
}

fn drop(doc: *Json) {
    drop_node_pool(&doc.nodes);
}

fn root_index(doc: *Json): usize {
    ret doc.root;
}

fn kind_of(doc: *Json, index: usize): JsonKind {
    var n = node_at(doc, index);
    if n == null { ret .Null; }
    ret n.kind;
}

// 枚举 tag 取整（stage1 枚举 == 有缺陷，用 @enum2int 比较更稳妥）。
fn kind_code(kind: JsonKind): usize {
    ret @enum2int(kind) as usize;
}

fn text_of(doc: *Json, index: usize): ByteView {
    var n = node_at(doc, index);
    if n == null { ret ByteView.empty(); }
    ret n.text;
}

fn array_count(doc: *Json, index: usize): usize {
    var n = node_at(doc, index);
    if n == null { ret 0; }
    match n.kind {
        .Array => { ret n.children.len; },
        _ => { ret 0; },
    }
    ret 0;
}

fn array_at(doc: *Json, index: usize, i: usize): usize {
    var n = node_at(doc, index);
    if n == null { ret ~(0 as usize); }
    match n.kind {
        .Array => {
            if i >= n.children.len { ret ~(0 as usize); }
            match Vec.get(&n.children, i) {
                .Ok(ptr) => { ret (ptr as *JsonChild).val; },
                .Err(error) => { ret ~(0 as usize); },
            }
        },
        _ => { ret ~(0 as usize); },
    }
    ret ~(0 as usize);
}

// 对象按键查找（线性，保持插入顺序）。找到返回节点下标。
fn object_find(doc: *Json, index: usize, key: ByteView): FindResult {
    var n = node_at(doc, index);
    if n == null { ret .NotFound; }
    match n.kind {
        .Object => {
            var i: usize = 0;
            var count = n.children.len;
            while i < count {
                match Vec.get(&n.children, i) {
                    .Ok(ptr) => {
                        var child = ptr as *JsonChild;
                        if ByteView.eq(child.key, key) { ret .Found(child.val); }
                    },
                    .Err(error) => {},
                }
                i = i + 1;
            }
            ret .NotFound;
        },
        _ => { ret .NotFound; },
    }
    ret .NotFound;
}

fn emit_quoted(out: *ByteBuffer, text: ByteView): Status {
    match ByteBuffer.append_byte(out, 34) { // '"'
        .Ok => {},
        .Err(error) => { ret .Err(error); },
    }
    match ByteBuffer.append(out, ByteView.as_slice(text)) {
        .Ok => {},
        .Err(error) => { ret .Err(error); },
    }
    ret ByteBuffer.append_byte(out, 34);
}

fn emit_indent(out: *ByteBuffer, indent: usize, depth: usize): Status {
    match ByteBuffer.append_byte(out, 10) { // '\n'
        .Ok => {},
        .Err(error) => { ret .Err(error); },
    }
    ret ByteBuffer.append_repeat(out, 32, depth * indent);
}

fn emit(out: *ByteBuffer, doc: *Json, index: usize, indent: usize, depth: usize): Status {
    var n = node_at(doc, index);
    if n == null { ret .Err(make(.OutOfRange)); }

    match n.kind {
        .Null => { ret ByteBuffer.append(out, "null"); },
        .True => { ret ByteBuffer.append(out, "true"); },
        .False => { ret ByteBuffer.append(out, "false"); },
        .Number => { ret ByteBuffer.append(out, ByteView.as_slice(n.text)); },
        .String => { ret emit_quoted(out, n.text); },
        .Array => { ret emit_children(out, doc, n, false, indent, depth); },
        .Object => { ret emit_children(out, doc, n, true, indent, depth); },
    }
    ret .Ok;
}

fn emit_children(out: *ByteBuffer, doc: *Json, n: *JsonNode, is_object: bool, indent: usize,
                 depth: usize): Status {
    var open_byte: u8 = 91;  // '['
    var close_byte: u8 = 93; // ']'
    if is_object {
        open_byte = 123;  // '{'
        close_byte = 125; // '}'
    }

    match ByteBuffer.append_byte(out, open_byte) {
        .Ok => {},
        .Err(error) => { ret .Err(error); },
    }

    var count = n.children.len;
    if count == 0 {
        ret ByteBuffer.append_byte(out, close_byte);
    }

    var i: usize = 0;
    while i < count {
        if i != 0 {
            match ByteBuffer.append_byte(out, 44) { // ','
                .Ok => {},
                .Err(error) => { ret .Err(error); },
            }
        }
        if indent != 0 {
            match emit_indent(out, indent, depth + 1) {
                .Ok => {},
                .Err(error) => { ret .Err(error); },
            }
        }

        match Vec.get(&n.children, i) {
            .Ok(ptr) => {
                var child = ptr as *JsonChild;
                if is_object {
                    match emit_quoted(out, child.key) {
                        .Ok => {},
                        .Err(error) => { ret .Err(error); },
                    }
                    match ByteBuffer.append_byte(out, 58) { // ':'
                        .Ok => {},
                        .Err(error) => { ret .Err(error); },
                    }
                    if indent != 0 {
                        match ByteBuffer.append_byte(out, 32) { // ' '
                            .Ok => {},
                            .Err(error) => { ret .Err(error); },
                        }
                    }
                }
                match emit(out, doc, child.val, indent, depth + 1) {
                    .Ok => {},
                    .Err(error) => { ret .Err(error); },
                }
            },
            .Err(error) => { ret .Err(error); },
        }
        i = i + 1;
    }

    if indent != 0 {
        match emit_indent(out, indent, depth) {
            .Ok => {},
            .Err(error) => { ret .Err(error); },
        }
    }
    ret ByteBuffer.append_byte(out, close_byte);
}

fn emit_compact(out: *ByteBuffer, doc: *Json): Status {
    ret emit(out, doc, doc.root, 0, 0);
}

fn emit_pretty(out: *ByteBuffer, doc: *Json, indent: usize): Status {
    ret emit(out, doc, doc.root, indent, 0);
}

// ---- 构造辅助（写 JSON 片段；字符串需由调用方保证已转义）----

fn write_int(out: *ByteBuffer, value: i64): Status {
    ret append_i64(out, value, 10, false);
}

fn write_u64(out: *ByteBuffer, value: u64): Status {
    ret append_u64(out, value, 10, false);
}

// ---- 测试辅助 ----

fn expect_ok(result: Status) {
    match result {
        .Ok => {},
        .Err(error) => { @assert(false, "unexpected json error"); },
    }
}

fn expect_bytes(out: *ByteBuffer, expected: []u8) {
    var actual = ByteBuffer.as_slice(out.*);
    @assert(actual.len == expected.len, "emitted length");
    var i: usize = 0;
    while i < expected.len {
        @assert(actual.ptr[i] == expected.ptr[i], "emitted byte");
        i = i + 1;
    }
}

fn expect_parse_error(result: JsonResult, pos: usize) {
    match result {
        .Ok(doc) => { @assert(false, "expected parse error"); },
        .Err(error) => {
            @assert(error.has_position, "positioned error");
            @assert(error.position == pos, "error position");
        },
    }
}

fn expect_kind(doc: *Json, index: usize, kind: JsonKind) {
    var n = node_at(doc, index);
    @assert(n != null, "node exists");
    @assert(kind_code(n.kind) == kind_code(kind), "node kind");
}

fn expect_text(doc: *Json, index: usize, expected: []u8) {
    var got = text_of(doc, index);
    var want = ByteView.from_slice(expected);
    @assert(ByteView.eq(got, want), "node text");
}

fn test_scalars() {
    var r = parse(ByteView.from_slice("null"));
    match r {
        .Ok(doc) => { expect_kind(&doc, root_index(&doc), .Null); drop(&doc); },
        .Err(error) => { @assert(false, "parse null"); },
    }

    r = parse(ByteView.from_slice("true"));
    match r {
        .Ok(doc) => { expect_kind(&doc, root_index(&doc), .True); drop(&doc); },
        .Err(error) => { @assert(false, "parse true"); },
    }

    r = parse(ByteView.from_slice("false"));
    match r {
        .Ok(doc) => { expect_kind(&doc, root_index(&doc), .False); drop(&doc); },
        .Err(error) => { @assert(false, "parse false"); },
    }

    r = parse(ByteView.from_slice("-12.5e2"));
    match r {
        .Ok(doc) => {
            var idx = root_index(&doc);
            expect_kind(&doc, idx, .Number);
            expect_text(&doc, idx, "-12.5e2");
            drop(&doc);
        },
        .Err(error) => { @assert(false, "parse number"); },
    }

    r = parse(ByteView.from_slice("\"hi\\n\""));
    match r {
        .Ok(doc) => {
            var idx = root_index(&doc);
            expect_kind(&doc, idx, .String);
            expect_text(&doc, idx, "hi\\n"); // 原始切片，未解码
            drop(&doc);
        },
        .Err(error) => { @assert(false, "parse string"); },
    }
}

fn test_containers_and_lookup() {
    var text = "{\"a\":1,\"b\":[true,null,\"x\"],\"c\":{\"d\":2}}";
    var r = parse(ByteView.from_slice(text));
    match r {
        .Ok(doc) => {
            var root = root_index(&doc);
            expect_kind(&doc, root, .Object);

            var a = ByteView.from_slice("a");
            match object_find(&doc, root, a) {
                .Found(idx) => {
                    expect_kind(&doc, idx, .Number);
                    expect_text(&doc, idx, "1");
                },
                .NotFound => { @assert(false, "find a"); },
            }

            var b = ByteView.from_slice("b");
            var bidx: usize = 0;
            match object_find(&doc, root, b) {
                .Found(idx) => { bidx = idx; },
                .NotFound => { @assert(false, "find b"); },
            }
            expect_kind(&doc, bidx, .Array);
            @assert(array_count(&doc, bidx) == 3, "array count");
            expect_kind(&doc, array_at(&doc, bidx, 0), .True);
            expect_kind(&doc, array_at(&doc, bidx, 1), .Null);
            expect_text(&doc, array_at(&doc, bidx, 2), "x");

            var c = ByteView.from_slice("c");
            var cidx: usize = 0;
            match object_find(&doc, root, c) {
                .Found(idx) => { cidx = idx; },
                .NotFound => { @assert(false, "find c"); },
            }
            var d = ByteView.from_slice("d");
            match object_find(&doc, cidx, d) {
                .Found(idx) => { expect_text(&doc, idx, "2"); },
                .NotFound => { @assert(false, "find c.d"); },
            }

            var missing = ByteView.from_slice("zzz");
            match object_find(&doc, root, missing) {
                .Found(idx) => { @assert(false, "unexpected find"); },
                .NotFound => {},
            }

            drop(&doc);
        },
        .Err(error) => { @assert(false, "parse object"); },
    }
}

fn test_roundtrip_compact() {
    var text = "{\"a\":1,\"b\":[true,null,\"x\\n\"],\"c\":{},\"d\":[],\"e\":-3.5e-2}";
    var r = parse(ByteView.from_slice(text));
    match r {
        .Ok(doc) => {
            var out = ByteBuffer.new();
            expect_ok(emit_compact(&out, &doc));
            expect_bytes(&out, text);
            ByteBuffer.drop(&out);
            drop(&doc);
        },
        .Err(error) => { @assert(false, "parse for roundtrip"); },
    }
}

fn test_pretty() {
    var text = "{\"a\":1,\"b\":[1,2]}";
    var r = parse(ByteView.from_slice(text));
    match r {
        .Ok(doc) => {
            var out = ByteBuffer.new();
            expect_ok(emit_pretty(&out, &doc, 2));
            var expected = "{\n  \"a\": 1,\n  \"b\": [\n    1,\n    2\n  ]\n}";
            expect_bytes(&out, expected);
            ByteBuffer.drop(&out);
            drop(&doc);
        },
        .Err(error) => { @assert(false, "parse pretty"); },
    }
}

fn test_errors() {
    expect_parse_error(parse(ByteView.from_slice("")), 0);
    expect_parse_error(parse(ByteView.from_slice("\"abc")), 4);
    expect_parse_error(parse(ByteView.from_slice("tru")), 3);
    expect_parse_error(parse(ByteView.from_slice("[1,]")), 3);
    expect_parse_error(parse(ByteView.from_slice("{\"a\":}")), 5);
    expect_parse_error(parse(ByteView.from_slice("1 2")), 2);
    expect_parse_error(parse(ByteView.from_slice("01")), 1);
}

fn test_construction_helpers() {
    var out = ByteBuffer.new();
    expect_ok(ByteBuffer.append(&out, "{\"id\":"));
    expect_ok(write_u64(&out, 18446744073709551615));
    expect_ok(ByteBuffer.append(&out, ",\"n\":"));
    expect_ok(write_int(&out, -7));
    expect_ok(ByteBuffer.append(&out, "}"));
    expect_bytes(&out, "{\"id\":18446744073709551615,\"n\":-7}");
    ByteBuffer.drop(&out);
}

fn test_large_array() {
    var out = ByteBuffer.new();
    expect_ok(ByteBuffer.append_byte(&out, 91)); // '['
    var i: usize = 0;
    while i < 1000 {
        if i != 0 { expect_ok(ByteBuffer.append_byte(&out, 44)); }
        expect_ok(ByteBuffer.append_byte(&out, 49)); // '1'
        i = i + 1;
    }
    expect_ok(ByteBuffer.append_byte(&out, 93)); // ']'

    var text = ByteBuffer.as_slice(out);
    var r = parse(ByteView.from_slice(text));
    match r {
        .Ok(doc) => {
            expect_kind(&doc, root_index(&doc), .Array);
            @assert(array_count(&doc, root_index(&doc)) == 1000, "large array count");
            expect_kind(&doc, array_at(&doc, root_index(&doc), 999), .Number);
            drop(&doc);
        },
        .Err(error) => { @assert(false, "parse large array"); },
    }
    ByteBuffer.drop(&out);
}

fn main() {
    test_scalars();
    test_containers_and_lookup();
    test_roundtrip_compact();
    test_pretty();
    test_errors();
    test_construction_helpers();
    test_large_array();
}