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Prompt

Struct Prompt 

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pub struct Prompt { /* private fields */ }
Expand description

统一的 Prompt 表示 — 同时是 Builder。

Prompt::new() 创建空 Prompt,链式添加层后 build() 产出 Message::System。 简单文本通过 From<&str> / From<String> 自动转换。

§示例

use lellm_core::{Prompt, Message};

// 分层构建 — 最大化前缀缓存
let msg = Prompt::new()
    .stable("核心身份…")
    .stable("工具指南…")
    .dynamic("会话上下文: …")
    .build();

// 简单文本 — 自动转换
let msg: Message = Prompt::from("hello").build();

Implementations§

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impl Prompt

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pub fn new() -> Self

创建空 Prompt。

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pub fn stable(self, text: impl Into<String>) -> Self

添加稳定层 — 内容不常变化,参与缓存前缀。

用于核心身份、工具指南、项目规则等。 最后一个 stable 层会自动获得 CacheControl::Breakpoint

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pub fn dynamic(self, text: impl Into<String>) -> Self

添加动态层 — 内容频繁变化,不参与缓存前缀。

用于会话上下文、临时注入信息等。

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pub fn build(self) -> Message

构建为 Message::System

断点放置策略:只在最后一个 stable layer 上放置 CacheControl::Breakpoint。 Anthropic 每个请求最多 4 个断点,中间断点不产生独立缓存段,纯属浪费。

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pub fn is_empty(&self) -> bool

是否为空(无层或所有层为空)。

Trait Implementations§

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impl Clone for Prompt

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fn clone(&self) -> Prompt

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for Prompt

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

Formats the value using the given formatter. Read more
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impl Default for Prompt

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl From<&String> for Prompt

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fn from(s: &String) -> Self

Converts to this type from the input type.
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impl From<&str> for Prompt

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fn from(s: &str) -> Self

Converts to this type from the input type.
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impl From<String> for Prompt

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fn from(s: String) -> Self

Converts to this type from the input type.

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> DynClone for T
where T: Clone,

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fn __clone_box(&self, _: Private) -> *mut ()

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.