/**
 * CSS <ident-token> RegExp.
 * Defined: https://www.w3.org/TR/css-syntax-3/#typedef-ident-token
 */
export declare const CLASS_NAME_IDENT: RegExp;
export declare const EXTENDS = "extends";
export declare const IMPLEMENTS = "implements";
export declare const BLOCK_NAME = "block-name";
export declare const BLOCK_ID = "block-id";
export declare const BLOCK_CLASS = "block-class";
export declare const BLOCK_ALIAS = "block-alias";
export declare const COMPOSES = "composes";
export declare const BLOCK_PROP_NAMES: Set<string>;
export declare const BLOCK_PROP_NAMES_RE: RegExp;
export declare const BLOCK_DEBUG = "block-debug";
export declare const BLOCK_GLOBAL = "block-global";
export declare const BLOCK_IMPORT = "block";
export declare const BLOCK_EXPORT = "export";
export declare const BLOCK_SYNTAX_VERSION = "block-syntax-version";
export declare const BLOCK_AT_RULES: Set<string>;
export interface Resolution {
    isInherited: boolean;
    path: string;
}
export declare function isResolution(value: string): boolean;
export declare function isConstraint(value: string): boolean;
export declare function getResolution(value: string): Resolution;
export declare function getConstraints(value: string): string[];
export declare const SELF_SELECTOR = "::self";
export declare const ATTR_PRESENT = "::attr-present";
export declare const ROOT_CLASS = ":scope";
export declare const DEFAULT_EXPORT = "default";
export declare const DEFAULT_NAMESPACE = "block";
/**
 * Names that a block cannot have as a namespace.
 */
export declare const RESERVED_NAMESPACES: Set<string>;
/**
 * Names that a block cannot have lest it collides with other syntax.
 */
export declare const RESERVED_BLOCK_NAMES: Set<string>;
export declare function isNamespaceReserved(name: string | undefined | null): boolean;
export declare function isBlockNameReserved(name: string | undefined | null): boolean;
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