langchain
Version:
Typescript bindings for langchain
25 lines (24 loc) • 1.65 kB
TypeScript
import type { InputValues } from "@langchain/core/utils/types";
import { type ParsedFStringNode, PromptTemplate, type PromptTemplateInput, TypedPromptInputValues } from "@langchain/core/prompts";
export type CustomFormatPromptTemplateInput<RunInput extends InputValues> = Omit<PromptTemplateInput<RunInput, string>, "templateFormat"> & {
customParser: (template: string) => ParsedFStringNode[];
templateValidator?: (template: string, inputVariables: string[]) => boolean;
renderer: (template: string, values: InputValues) => string;
};
export declare class CustomFormatPromptTemplate<RunInput extends InputValues = any, PartialVariableName extends string = any> extends PromptTemplate<RunInput, PartialVariableName> {
static lc_name(): string;
lc_serializable: boolean;
templateValidator?: (template: string, inputVariables: string[]) => boolean;
renderer: (template: string, values: InputValues) => string;
constructor(input: CustomFormatPromptTemplateInput<RunInput>);
/**
* Load prompt template from a template
*/
static fromTemplate<RunInput extends InputValues = Record<string, any>>(template: string, { customParser, ...rest }: Omit<CustomFormatPromptTemplateInput<RunInput>, "template" | "inputVariables">): CustomFormatPromptTemplate<RunInput extends Symbol ? never : RunInput, any>;
/**
* Formats the prompt template with the provided values.
* @param values The values to be used to format the prompt template.
* @returns A promise that resolves to a string which is the formatted prompt.
*/
format(values: TypedPromptInputValues<RunInput>): Promise<string>;
}