/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.dev/license
 */
import ts from 'typescript';
import { AbsoluteFsPath } from '../file_system';
/**
 * Generates a single shim file for the entire program.
 */
export interface TopLevelShimGenerator {
    /**
     * Whether this shim should be emitted during TypeScript emit.
     */
    readonly shouldEmit: boolean;
    /**
     * Create a `ts.SourceFile` representing the shim, with the correct filename.
     */
    makeTopLevelShim(): ts.SourceFile;
}
/**
 * Generates a shim file for each original `ts.SourceFile` in the user's program, with a file
 * extension prefix.
 */
export interface PerFileShimGenerator {
    /**
     * The extension prefix which will be used for the shim.
     *
     * Knowing this allows the `ts.CompilerHost` implementation which is consuming this shim generator
     * to predict the shim filename, which is useful when a previous `ts.Program` already includes a
     * generated version of the shim.
     */
    readonly extensionPrefix: string;
    /**
     * Whether shims produced by this generator should be emitted during TypeScript emit.
     */
    readonly shouldEmit: boolean;
    /**
     * Generate the shim for a given original `ts.SourceFile`, with the given filename.
     */
    generateShimForFile(sf: ts.SourceFile, genFilePath: AbsoluteFsPath, priorShimSf: ts.SourceFile | null): ts.SourceFile;
}