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Add Effect.transposeOption, closes #3142 #4284

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Add Effect.transposeOption, closes #3142 #4284

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gcanti
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@gcanti gcanti commented Jan 17, 2025

Converts an Option of an Effect into an Effect of an Option.

Details

This function transforms an Option<Effect<A, E, R>> into an
Effect<Option<A>, E, R>. If the Option is None, the resulting Effect
will immediately succeed with a None value. If the Option is Some, the
inner Effect will be executed, and its result wrapped in a Some.

Example

import { Effect, Option } from "effect"

//      ┌─── Option<Effect<number, never, never>>
//      ▼
const maybe = Option.some(Effect.succeed(42))

//      ┌─── Effect<Option<number>, never, never>
//      ▼
const result = Effect.transposeOption(maybe)

console.log(Effect.runSync(result))
// Output: { _id: 'Option', _tag: 'Some', value: 42 }

@gcanti gcanti requested a review from mikearnaldi as a code owner January 17, 2025 09:40
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changeset-bot bot commented Jan 17, 2025

🦋 Changeset detected

Latest commit: 355cf77

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 35 packages
Name Type
effect Minor
@effect/cli Major
@effect/cluster-browser Major
@effect/cluster-node Major
@effect/cluster-workflow Major
@effect/cluster Major
@effect/experimental Major
@effect/opentelemetry Major
@effect/platform-browser Major
@effect/platform-bun Major
@effect/platform-node-shared Major
@effect/platform-node Major
@effect/platform Major
@effect/printer-ansi Major
@effect/printer Major
@effect/rpc-http Major
@effect/rpc Major
@effect/sql-clickhouse Major
@effect/sql-d1 Major
@effect/sql-drizzle Major
@effect/sql-kysely Major
@effect/sql-libsql Major
@effect/sql-mssql Major
@effect/sql-mysql2 Major
@effect/sql-pg Major
@effect/sql-sqlite-bun Major
@effect/sql-sqlite-do Major
@effect/sql-sqlite-node Major
@effect/sql-sqlite-react-native Major
@effect/sql-sqlite-wasm Major
@effect/sql Major
@effect/typeclass Major
@effect/vitest Major
@effect/ai Major
@effect/ai-openai Major

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@effect-bot effect-bot force-pushed the next-minor branch 4 times, most recently from 0951816 to 71cc094 Compare January 18, 2025 07:18
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