Struct LspCodec 

pub struct LspCodec { /* private fields */ }

LSP wire protocol codec implementing Content-Length framing.

This codec handles encoding and decoding of LSP Message types using the Content-Length header framing specified by the LSP wire protocol.

Encoding

Messages are serialized to JSON, then prefixed with a Content-Length header:

Content-Length: {byte_length}\r\n\r\n{json_body}

Decoding

The decoder handles partial reads by maintaining state between calls:

• Returns Ok(None) if the header is incomplete
• Returns Ok(None) if the body is incomplete
• Returns Ok(Some(message)) when a complete message is available

Thread Safety

LspCodec maintains internal parsing state and should not be shared between concurrent readers. Use one codec instance per direction (read/write) or use Framed which handles this correctly.

Implementations

impl LspCodec

pub fn new() -> Self

Creates a new LspCodec ready to encode and decode messages.

Trait Implementations

impl Debug for LspCodec

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

Formats the value using the given formatter.

impl Decoder for LspCodec

type Item = Message

The type of decoded frames.

type Error = Error

The type of unrecoverable frame decoding errors.

fn decode( &mut self, src: &mut BytesMut, ) -> Result<Option<Self::Item>, Self::Error>

Attempts to decode a frame from the provided buffer of bytes.

fn decode_eof( &mut self, buf: &mut BytesMut, ) -> Result<Option<Self::Item>, Self::Error>

A default method available to be called when there are no more bytes available to be read from the underlying I/O.

fn framed<T>(self, io: T) -> Framed<T, Self>

where T: AsyncRead + AsyncWrite, Self: Sized,

Provides a Stream and Sink interface for reading and writing to this Io object, using Decode and Encode to read and write the raw data.

impl Default for LspCodec

fn default() -> LspCodec

Returns the “default value” for a type.

impl Encoder<Message> for LspCodec

type Error = Error

The type of encoding errors.

fn encode( &mut self, item: Message, dst: &mut BytesMut, ) -> Result<(), Self::Error>

Encodes a frame into the buffer provided.