create-pre-resolved-effects-with-succeed-and-fail

description: Create pre-resolved effects with succeed and fail. globs: "**/*.ts" alwaysApply: true

Create Pre-resolved Effects with succeed and fail

Rule: Create pre-resolved effects with succeed and fail.

Example

import { Effect, Data } from "effect";

// Create a custom error type
class MyError extends Data.TaggedError("MyError") {}

// Create a program that demonstrates pre-resolved effects
const program = Effect.gen(function* () {
  // Success effect
  yield* Effect.logInfo("Running success effect...");
  yield* Effect.gen(function* () {
    const value = yield* Effect.succeed(42);
    yield* Effect.logInfo(`Success value: ${value}`);
  });

  // Failure effect
  yield* Effect.logInfo("\nRunning failure effect...");
  yield* Effect.gen(function* () {
    // Use return yield* for effects that never succeed
    return yield* Effect.fail(new MyError());
  }).pipe(
    Effect.catchTag("MyError", (error) =>
      Effect.logInfo(`Error occurred: ${error._tag}`)
    )
  );
});

// Run the program
Effect.runPromise(program);

Explanation:
Use Effect.succeed for values you already have, and Effect.fail for immediate, known errors.

Explanation:
These are the simplest effect constructors, essential for returning static values within functions that must return an Effect.