Pattern Matching

Exhaustive pattern matching in Effect replaces if/else cascades by piping input through Match.value, Match.when, and Match.exhaustive to evaluate discriminated unions and enforce type safety. This approach ensures all branches resolve without unhandled cases.

Type narrowing for tagged data in Effect is handled using Schema.is integration and Match.type, which allows you to create reusable matchers that validate and narrow types within a Match pipeline for robust data-driven decisions.

Yes, you can use Match.tag for discriminated unions in Effect without external setup. The Match API operates natively within the Effect ecosystem, requiring no additional dependencies to evaluate tagged union variants.

You need Match.type for complex branching scenarios in Effect when you want to instantiate reusable matchers. It simplifies logic by allowing you to apply the same pattern matching pipeline across different inputs and data structures.

Effect pattern matching requires no external dependencies to handle error control flow. It leverages the built-in Match API to replace imperative logic with exhaustive checks for error handling and data-driven decisions directly.

Using Match.value and Match.exhaustive instead of switch statements provides compile-time safety for type guards. It ensures that every discriminated union variant is explicitly handled, eliminating missing case errors in complex branching scenarios.