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import type { Node as EstreeNode } from 'estree'
import type { Mapping, SourceMapGenerator } from 'source-map'
import type { Writable } from 'stream'
/**
* State object passed to generator functions.
*/
export interface State {
output: string
write(code: string): void
writeComments: boolean
indent: string
lineEnd: string
indentLevel: number
line?: number
column?: number
lineEndSize?: number
mapping?: Mapping
}
/**
* Code generator for each node type.
*/
export type Generator = {
[T in EstreeNode['type']]: (
node: EstreeNode & { type: T },
state: State,
) => void
}
/**
* Code generator options.
*/
export interface Options<Output = null> {
/**
* If present, source mappings will be written to the generator.
*/
sourceMap?: SourceMapGenerator
/**
* String to use for indentation, defaults to `"␣␣"`.
*/
indent?: string
/**
* String to use for line endings, defaults to `"\n"`.
*/
lineEnd?: string
/**
* Indent level to start from, defaults to `0`.
*/
startingIndentLevel?: number
/**
* Generate comments if `true`, defaults to `false`.
*/
comments?: boolean
/**
* Output stream to write the render code to, defaults to `null`.
*/
output?: Output
/**
* Custom code generator logic.
*/
generator?: Generator
}
/**
* Core Estree Node type to accommodate derived node types from parsers.
*/
interface Node {
type: string
}
/**
* Returns a string representing the rendered code of the provided AST `node`.
* However, if an `output` stream is provided in the `options`, it writes to that stream and returns it.
*/
export function generate(node: Node, options?: Options<null>): string
export function generate(node: Node, options?: Options<Writable>): Writable
/**
* Base code generator.
*/
export const GENERATOR: Generator;