Struct ToolCallAssembler 

pub struct ToolCallAssembler { /* private fields */ }

Accumulates streamed tool-call fragments by content-block index.

Implementations

impl ToolCallAssembler

pub fn new() -> Self

A fresh, empty assembler.

pub fn begin( &mut self, index: usize, id: impl Into<String>, name: impl Into<String>, )

Begin a tool call at index (from the stream’s content_block_start).

pub fn push_json( &mut self, index: usize, fragment: &str, ) -> Result<(), AssembleError>

Append a raw partial-JSON fragment for index. Never parsed here.

Errors

AssembleError::MissingStart if no ToolCallAssembler::begin was seen for index.

pub fn finish(self) -> Result<Vec<ContentBlock>, AssembleError>

Finish: parse each accumulated buffer once, in index order, into ContentBlock::ToolUse blocks.

An empty/whitespace buffer becomes {} — Anthropic sends empty input for a no-argument tool call.

Errors

AssembleError::InvalidJson if any accumulated buffer is not valid JSON.

Trait Implementations

impl Debug for ToolCallAssembler

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

Formats the value using the given formatter.

impl Default for ToolCallAssembler

fn default() -> ToolCallAssembler

Returns the “default value” for a type.