import type { DualFn, ShaderStage } from '../types.ts';
/**
 * Returns `true` when the direct callee is being transpiled for GPU, otherwise `false`.
 *
 * @example
 * const f = () => {
 *   'use gpu';
 *   return isBeingTranspiled() ? 1 : 0;
 * };
 *
 * f(); // returns 0, but resolved WGSL looks like this:
 *
 * fn f() -> i32 {
 *   return 1;
 * }
 *
 * @note
 * Inside `comptime`, `lazy` or `simulate`, it always returns `false`.
 */
export declare const isBeingTranspiled: DualFn<() => boolean>;
/**
 * If invoked during the resolution process, it returns the name of the shader language that
 * is ultimately being generated (usually `wgsl`); otherwise, returns `undefined`.
 *
 * @example
 * function f() {
 *   'use gpu';
 *   return getTargetShaderLanguage() === 'wgsl';
 * };
 *
 * f(); // returns false, but resolved WGSL looks like this:
 *
 * fn f() -> bool {
 *   return true;
 * }
 *
 * @note
 * Inside `simulate`, it always returns `undefined`.
 *
 * Inside `comptime`, it returns the shader language that is ultimately
 * being generated (usually `wgsl`) if called during the resolution process; otherwise, `undefined`.
 */
export declare const getTargetShaderLanguage: import("../indexNamedExports.ts").TgpuComptime<() => string | undefined>;
/**
 * Can be used to change behavior based on which shader stage the code is being
 * used in. If used in a 'use gpu' function, its definition will be duplicated
 * for each shader stage.
 *
 * @note
 * When called outside of shader resolution, or when the shader stage cannot be
 * determined, `undefined` is returned.
 */
export declare const getShaderStage: import("../indexNamedExports.ts").TgpuComptime<() => ShaderStage | undefined>;