Enum ContentBlock 

pub enum ContentBlock {
    Text {
        text: String,
        cache_control: Option<CacheControl>,
    },
    Image {
        source: ImageSource,
        cache_control: Option<CacheControl>,
    },
    Thinking {
        thinking: String,
        signature: Option<String>,
    },
    RedactedThinking {
        data: String,
    },
    ToolUse {
        id: String,
        name: String,
        input: Value,
    },
    ToolResult {
        tool_use_id: String,
        content: Option<ToolResultContent>,
        is_error: Option<bool>,
    },
}

All possible content block types in request AND response messages.

Tagged on the type field so {"type": "text", "text": "hello"} maps to ContentBlock::Text { text: "hello", .. }.

Variants

Text

Plain text content

Fields

text: String

cache_control: Option<CacheControl>

Image

Image content (base64 or URL)

Fields

source: ImageSource

cache_control: Option<CacheControl>

Thinking

Model’s thinking/reasoning (returned with adaptive thinking enabled)

Fields

thinking: String

signature: Option<String>

RedactedThinking

Redacted thinking block (safety-filtered reasoning)

Fields

data: String

ToolUse

Model wants to call a tool (response only)

Fields

id: String

name: String

input: Value

ToolResult

Result of a tool call (request only - sent back by the client)

Fields

tool_use_id: String

content: Option<ToolResultContent>

is_error: Option<bool>

Implementations

impl ContentBlock

pub fn as_text(&self) -> Option<&str>

Extract text content if this is a Text block

pub fn as_thinking(&self) -> Option<&str>

Extract thinking content if this is a Thinking block

Trait Implementations

impl Clone for ContentBlock

fn clone(&self) -> ContentBlock

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ContentBlock

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ContentBlock

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ContentBlock

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.