import type { TEnvDefaultFn } from './types';
/** Tries each default function in order and returns the first non-undefined result. */
export declare function pipeDefaults<GValue>(firstDefault: TEnvDefaultFn<GValue>, ...defaults: TEnvDefaultFn<GValue>[]): TEnvDefaultFn<GValue>;
/** Returns value when NODE_ENV in the env source matches one of the allowed values. */
export declare function envDefault<GValue>(value: GValue, allowedEnvs: readonly string[]): TEnvDefaultFn<GValue>;
/** Active when NODE_ENV is "development". */
export declare function devDefault<GValue>(value: GValue): TEnvDefaultFn<GValue>;
/** Active when NODE_ENV is "local" or "development". */
export declare function localDefault<GValue>(value: GValue): TEnvDefaultFn<GValue>;
/** Active when NODE_ENV is "test". */
export declare function testDefault<GValue>(value: GValue): TEnvDefaultFn<GValue>;
/** Active when the CI environment variable is set to a truthy value. */
export declare function ciDefault<GValue>(value: GValue): TEnvDefaultFn<GValue>;
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