Struct ProtocolVersionError 

pub struct ProtocolVersionError {
    pub client_version: Option<String>,
    pub server_version: Option<String>,
    pub min_supported: Option<String>,
    pub max_supported: Option<String>,
    pub message: String,
}

版本握手被拒错误 / Protocol-version handshake rejection error。

客户端（Agent/Computer）解析服务端返回的 4008 crate::ErrorPayload 后抛出的强类型错误， 承载顶层平铺的版本诊断字段。对标 Python 参考实现 a2c_smcp/exceptions.py 的 ProtocolVersionError（置于共享层、Agent 与 Computer 共用，避免反向依赖）。

由 crate::utils::handshake::build_protocol_version_error 从 4008 负载构造。

Fields

client_version: Option<String>

客户端版本（4008 body 顶层 client_version）。

server_version: Option<String>

服务端版本（server_version）。

min_supported: Option<String>

服务端支持的最小版本（min_supported）。

max_supported: Option<String>

服务端支持的最大版本（max_supported）。

message: String

人类可读错误描述（message）。

Implementations

impl ProtocolVersionError

pub fn new(message: impl Into<String>) -> ProtocolVersionError

以一条 message 构造（版本字段留空）/ Construct from a bare message。

Trait Implementations

impl Clone for ProtocolVersionError

fn clone(&self) -> ProtocolVersionError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProtocolVersionError

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Display for ProtocolVersionError

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Eq for ProtocolVersionError

impl Error for ProtocolVersionError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for ProtocolVersionError

fn eq(&self, other: &ProtocolVersionError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ProtocolVersionError