import type { Show } from 'fp-ts/Show'
import { Endomorphism } from 'fp-ts/function'
/**
 * @category model
 * @since 0.0.1
 */
export declare type Token = TagOpen | TagClose | Text | Comment
/**
 * @category model
 * @since 0.0.1
 */
export interface TagOpen {
  readonly _tag: 'TagOpen'
  readonly name: string
  readonly attributes: ReadonlyArray<Attribute>
}
/**
 * @category model
 * @since 0.0.1
 */
export interface TagClose {
  readonly _tag: 'TagClose'
  readonly name: string
}
/**
 * @category model
 * @since 0.0.1
 */
export interface Text {
  readonly _tag: 'Text'
  readonly text: string
}
/**
 * @category model
 * @since 0.0.1
 */
export interface Comment {
  readonly _tag: 'Comment'
  readonly comment: string
}
/**
 * @category model
 * @since 0.0.1
 */
export interface Attribute {
  readonly key: string
  readonly value: string
}
/**
 * @category constructors
 * @since 0.0.1
 */
export declare const TagOpen: (name: string, attributes: ReadonlyArray<Attribute>) => Token
/**
 * @category constructors
 * @since 0.0.1
 */
export declare const TagClose: (name: string) => Token
/**
 * @category constructors
 * @since 0.0.1
 */
export declare const Text: (text: string) => Token
/**
 * @category constructors
 * @since 0.0.1
 */
export declare const Comment: (comment: string) => Token
/**
 * @category constructors
 * @since 0.0.1
 */
export declare const Attribute: (key: string, value: string) => Attribute
/**
 * @category destructors
 * @since 0.0.1
 */
export declare const fold: <R>(patterns: {
  readonly TagOpen: (name: string, attributes: ReadonlyArray<Attribute>) => R
  readonly TagClose: (name: string) => R
  readonly Text: (text: string) => R
  readonly Comment: (comment: string) => R
}) => (token: Token) => R
/**
 * Reduces the complexity of a tokenized HTML document by dropping empty `Text` tokens.
 *
 * @category combinators
 * @since 0.0.1
 */
export declare const canonicalizeTokens: Endomorphism<ReadonlyArray<Token>>
/**
 * @category parsers
 * @since 0.0.1
 */
export declare const parse: (source: string) => ReadonlyArray<Token>
/**
 * @category instances
 * @since 0.0.1
 */
export declare const showToken: Show<Token>