export type Open = {
    readonly char: "{" | "[" | "(";
    readonly line: number;
    readonly headerLine?: number;
    /** Opened where a value may start, so it can still turn out to be an assignment target. */
    readonly target?: boolean;
    readonly foldable: boolean;
    readonly protected: boolean;
    readonly signature: boolean;
    readonly interpolation: boolean;
    readonly control: boolean;
    readonly call: boolean;
    readonly valueParameters: boolean;
    readonly declaration: boolean;
};
export declare const expressionKeywords: Set<string>;
export declare const controls: Set<string>;
export declare const signatureDeclarations: Set<string>;
/** Only expression callees release argument values; declarations retain parameter protection. */
export declare function isCallCallee(previous: string, beforeWord: string): boolean;
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