import { Predicate } from "@tsplus/stdlib/data/Predicate";
import { TArray } from "@effect/core/stm/TArray/definition";
import { STM } from "@effect/core/stm/STM/definition/base";
/**
 * Get the index of the first entry in the array matching a predicate.
 * @tsplus static effect/core/stm/TArray.Aspects indexWhere
 * @tsplus pipeable effect/core/stm/TArray indexWhere
 * @tsplus location "@effect/core/stm/TArray/operations/indexWhere"
 */
export declare function indexWhere<A>(f: Predicate<A>): (self: TArray<A>) => STM<never, never, number>;
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