Initial Dever 0.0.1
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// 两侧从已验证的原始值开始，独立参照直接序列化 Serde RawValue。
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// 此组只比较原文输出；构造与更新成本由现有 json 组同时检查。
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struct RawOutputCase {
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dever: Json,
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rust: Box<RawValue>,
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values: usize,
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depth: usize,
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}
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fn runtime_raw_output(values: &[RawOutputCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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Ok(value.dever.as_str().trim_ascii().to_owned())
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})
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}
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fn native_raw_output(values: &[RawOutputCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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serde_json::to_string(&value.rust).map_err(json_fault)
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})
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}
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fn runtime_nested_output(values: &[RawOutputCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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Json::array(std::slice::from_ref(&value.dever)).map(Json::into_text).map_err(json_fault)
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})
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}
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fn native_nested_output(values: &[RawOutputCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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if value.values + 1 > 65_536 || value.depth + 1 > 64 || value.rust.get().len() + 2 > 16 * 1024 * 1024 {
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return Err(json_fault("JSON budget"));
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}
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serde_json::to_string(&[&value.rust]).map_err(json_fault)
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})
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}
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fn generated_nested_array_output(values: &[RawOutputCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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GENERATED_ARRAY(std::slice::from_ref(&value.dever)).map_err(json_fault)
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})
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}
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fn runtime_from_text(values: &[String]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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Json::parse(value).map(Json::into_text).map_err(json_fault)
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})
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}
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fn native_from_text(values: &[String]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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serde_json::from_str::<Box<RawValue>>(value)
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.map(|raw| Box::<str>::from(raw).into()).map_err(json_fault)
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})
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}
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fn runtime_from_text_nested(values: &[String]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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let raw = Json::parse(value).map_err(json_fault)?;
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Json::array(&[raw]).map(Json::into_text).map_err(json_fault)
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})
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}
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fn native_from_text_nested(values: &[String]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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let raw: Box<RawValue> = serde_json::from_str(value).map_err(json_fault)?;
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serde_json::to_string(&[raw]).map_err(json_fault)
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})
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}
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fn from_text_costs(name: &str, source: &str, values: &[RawOutputCase]) {
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let count = if name == "short" { 100_000 } else { 1000 };
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compare_named(
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&format!("json_nested_output_{name}"), values, count,
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runtime_nested_output, native_nested_output,
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|value| value.len() as u64, "rust_serde",
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);
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compare_named(
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&format!("json_dever_array_output_{name}"), values, count,
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generated_nested_array_output, native_nested_output,
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|value| value.len() as u64, "rust_serde",
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);
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// 原生参照仅检查 JSON 语法，不包含 Dever 的去重和预算，不能据此宣称合同追平。
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let sources = [source.to_owned()];
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compare_named(
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&format!("json_from_text_{name}"), &sources, count,
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runtime_from_text, native_from_text,
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|value| value.len() as u64, "rust_syntax_only",
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);
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compare_named(
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&format!("json_from_text_nested_{name}"), &sources, count,
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runtime_from_text_nested, native_from_text_nested,
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|value| value.len() as u64, "rust_syntax_only",
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);
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}
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fn raw_output_costs() {
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nested_output_costs();
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array_output_costs();
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for (name, text) in [
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("short", "a".repeat(64)),
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("plain_4096", "a".repeat(4096)),
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("plain_65536", "a".repeat(65536)),
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("escaped", "雪\"\\\n".repeat(1024)),
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] {
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let source = format!(
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"{{\"text\":{},\"number\":1e9999}}",
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serde_json::to_string(&text).unwrap()
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);
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let values = [RawOutputCase {
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dever: Json::parse(&source).unwrap(),
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rust: serde_json::from_str(&source).unwrap(),
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// 上面构造的对象恰好包含 text、number 两个标量字段。
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values: 3,
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depth: 1,
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}];
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assert_eq!(runtime_raw_output(&values).unwrap(), source);
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assert_eq!(native_raw_output(&values).unwrap(), source);
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from_text_costs(name, &source, &values);
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compare_named(
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&format!("json_raw_output_{name}"),
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&values,
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1000,
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runtime_raw_output,
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native_raw_output,
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|value| value.len() as u64,
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"rust_serde",
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);
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// 输入解码已经取得 RawValue；输出不应丢掉它后再从 String 解析。
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let decoded = [RawOutputCase {
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dever: serde_json::from_str(&source).unwrap(),
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rust: serde_json::from_str(&source).unwrap(),
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values: 3,
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depth: 1,
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}];
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compare_named(
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&format!("json_decoded_output_{name}"),
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&decoded,
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1000,
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runtime_raw_output,
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native_raw_output,
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|value| value.len() as u64,
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"rust_serde",
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);
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}
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}
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struct ArrayOutputCase {
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dever: Vec<Json>,
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rust: Vec<NativeArrayValue>,
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}
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struct NativeArrayValue {
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raw: Box<RawValue>,
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values: usize,
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depth: usize,
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}
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struct NativeArray<'value>(&'value [NativeArrayValue]);
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impl Serialize for NativeArray<'_> {
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fn serialize<Encoder: Serializer>(&self, encoder: Encoder) -> Result<Encoder::Ok, Encoder::Error> {
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use dever_runtime::wire::serde::ser::{Error, SerializeSeq};
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let mut sequence = encoder.serialize_seq(Some(self.0.len()))?;
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let mut count = 1;
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let mut bytes = 2;
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for (index, value) in self.0.iter().enumerate() {
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count += value.values;
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bytes += value.raw.get().len() + usize::from(index != 0);
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if count > 65_536 || value.depth + 1 > 64 || bytes > 16 * 1024 * 1024 {
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return Err(Encoder::Error::custom("JSON budget"));
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}
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sequence.serialize_element(&value.raw)?;
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}
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sequence.end()
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}
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}
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fn runtime_array_output(values: &[ArrayOutputCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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Json::array(&value.dever).map(Json::into_text).map_err(json_fault)
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})
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}
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fn native_array_output(values: &[ArrayOutputCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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serde_json::to_string(&NativeArray(&value.rust)).map_err(json_fault)
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})
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}
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fn generated_array_output(values: &[ArrayOutputCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| {
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GENERATED_ARRAY(&value.dever).map_err(json_fault)
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})
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}
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fn array_output_costs() {
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for count in [0, 1, 4, 16] {
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let sources: Vec<_> = [" null ", " [1,-0] ", r#" {"雪":"\u96ea"} "#, " [] "]
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.into_iter().cycle().take(count).collect();
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// 两侧每个子值都已验证且保留结构统计；计时包含合并预算和完整写出。
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let values = [ArrayOutputCase {
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dever: sources.iter().map(|source| Json::parse(source).unwrap()).collect(),
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rust: sources.iter().map(|source| {
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let (values, depth) = reference_shape(&serde_json::from_str(source).unwrap());
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NativeArrayValue { raw: serde_json::from_str(source).unwrap(), values, depth }
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}).collect(),
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}];
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compare_named(&format!("json_array_mixed_{count}"), &values, 100_000,
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runtime_array_output, native_array_output, |value| value.len() as u64, "rust_bounded");
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compare_named(&format!("json_dever_array_mixed_{count}"), &values, 100_000,
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generated_array_output, native_array_output, |value| value.len() as u64, "rust_bounded");
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}
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}
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struct NestedCase {
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dever: Json,
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rust: Box<RawValue>,
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values: usize,
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depth: usize,
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}
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fn runtime_nested_record(values: &[NestedCase]) -> Result<String, Fault> {
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values.first().map_or(Ok(String::new()), |value| GENERATED_NESTED(&value.dever).map_err(json_fault))
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}
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fn native_nested_record(values: &[NestedCase]) -> Result<String, Fault> {
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#[derive(Serialize)]
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#[serde(crate = "dever_runtime::wire::serde")]
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struct Nested<'value> { value: &'value RawValue }
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let Some(value) = values.first() else { return Ok(String::new()); };
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if value.values + 1 > 65_536 || value.depth + 1 > 64 || value.rust.get().len() + 10 > 16 * 1024 * 1024 {
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return Err(json_fault("JSON budget"));
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}
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serde_json::to_string(&Nested { value: &value.rust }).map_err(json_fault)
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}
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fn reference_shape(value: &serde_json::Value) -> (usize, usize) {
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let children: Vec<_> = match value {
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serde_json::Value::Array(values) => values.iter().map(reference_shape).collect(),
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serde_json::Value::Object(values) => values.values().map(reference_shape).collect(),
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_ => return (1, 0),
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};
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(1 + children.iter().map(|child| child.0).sum::<usize>(), 1 + children.iter().map(|child| child.1).max().unwrap_or(0))
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}
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fn nested_output_costs() {
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for (name, text) in [
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("short", "a".repeat(64)),
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("plain_4096", "a".repeat(4096)),
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("plain_65536", "a".repeat(65536)),
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("escaped", "雪\"\\\n".repeat(1024)),
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] {
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let source = format!("{{\"text\":{},\"number\":-0}}", serde_json::to_string(&text).unwrap());
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// 两侧都从已验证原文及结构信息开始；独立 Rust 不调用 Dever 的验证或输出。
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let (count, depth) = reference_shape(&serde_json::from_str(&source).unwrap());
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let values = [NestedCase {
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dever: Json::parse(&source).unwrap(),
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rust: serde_json::from_str(&source).unwrap(), values: count, depth,
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}];
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compare_named(&format!("json_dever_nested_{name}"), &values,
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if name == "short" { 100_000 } else { 1000 },
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runtime_nested_record, native_nested_record, |value| value.len() as u64, "rust_bounded");
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}
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}
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