import { BlockNode, Node, ChildNode } from "../../ast";
import { RenderContext } from "../../context";
import { Environment } from "../../environment";
import { Expression } from "../../expression";
import { RenderStream } from "../../io/output_stream";
import { Tag } from "../../tag";
import { Token, TokenStream } from "../../token";
type ConditionalAlternative = {
    token: Token;
    condition: Expression;
    consequence: BlockNode;
};
export declare class UnlessTag implements Tag {
    protected static END_IF_BLOCK: Set<string>;
    protected static END_ELSEIF_BLOCK: Set<string>;
    protected static END_ELSE_BLOCK: Set<string>;
    readonly block = true;
    readonly name: string;
    readonly end: string;
    protected nodeClass: typeof UnlessNode;
    protected parseExpression(stream: TokenStream): Expression;
    parse(stream: TokenStream, environment: Environment): Node;
}
export declare class UnlessNode implements Node {
    readonly token: Token;
    private condition;
    private consequence;
    private conditionalAlternatives;
    private alternative?;
    forceOutput: boolean;
    constructor(token: Token, condition: Expression, consequence: BlockNode, conditionalAlternatives: ConditionalAlternative[], alternative?: BlockNode | undefined);
    render(context: RenderContext, out: RenderStream): Promise<void>;
    renderSync(context: RenderContext, out: RenderStream): void;
    children(): ChildNode[];
}
export {};