/**
 * Control flow & composition components — ForEach, If, Elif, Else, Define, Use, Slot
 */
import { Component, ContainerComponent } from '../../core/component.js';
import type { ContainerProps, ComponentProps, RxStr } from '../../core/component.js';
export interface ForEachProps extends ContainerProps {
    expression: RxStr;
    let?: Record<string, unknown>;
}
export declare function ForEach(props: ForEachProps): ContainerComponent;
export interface ConditionProps extends ContainerProps {
    condition: RxStr;
}
/**
 * Conditional rendering.
 *
 * @example Full props form:
 * ```ts
 * If({ condition: '$count > 0', children: [Text({ text: 'Has items' })] })
 * ```
 *
 * @example Shorthand (condition + children):
 * ```ts
 * If('$count > 0', [Text({ text: 'Has items' })])
 * ```
 */
export declare function If(propsOrCondition: ConditionProps | RxStr, children?: Component[]): ContainerComponent;
/**
 * Else-if conditional rendering.
 *
 * @example Shorthand:
 * ```ts
 * Elif('$count === 0', [Text({ text: 'Empty' })])
 * ```
 */
export declare function Elif(propsOrCondition: ConditionProps | RxStr, children?: Component[]): ContainerComponent;
export declare function Else(props?: ContainerProps): ContainerComponent;
/**
 * Define a reusable named component template.
 * Goes into the `defs` section of the wire format.
 */
export interface DefineProps extends ContainerProps {
    /** Unique name for this definition. */
    name: string;
}
export declare function Define(props: DefineProps): ContainerComponent;
/**
 * Reference a named definition (from defs).
 * Resolves to the component tree defined by `Define`.
 */
export interface UseProps extends ComponentProps {
    /** Name of the definition to use. */
    def: string;
    /** Override props to pass to the definition. */
    overrides?: Record<string, unknown>;
}
export declare function Use(props: UseProps): Component;
/**
 * Dynamic content injection point.
 * Used inside `Define` to mark where child content is placed.
 */
export interface SlotProps extends ComponentProps {
    /** Optional named slot identifier. */
    name?: string;
    /** Fallback content if no injection provided. */
    fallback?: Component;
}
export declare function Slot(props?: SlotProps): Component;
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