semver-effect

Strict SemVer 2.0.0 implementation built on Effect. Every operation returns typed errors through Effect's error channel -- no null, no exceptions, no loose mode.

Features

• Class-based API with instance methods (v.bump.minor(), range.test(v)) and static methods (SemVer.parse(), Range.parse())
• Standalone functions for pipe/data-last composition (gt, satisfies, bumpMajor, etc.)
• Strict SemVer 2.0.0 parsing with precise error positions (recursive descent, no regex)
• Typed error channel for every operation -- handle InvalidVersionError, UnsatisfiedRangeError, and others explicitly
• Range algebra: intersect, union, subset, equivalence, and simplification

Installation

npm install semver-effect effect

Quick Start

import { Effect } from "effect";
import { SemVer, Range } from "semver-effect";

const program = Effect.gen(function* () {
  // Parse strings with static methods -- typed errors in the Effect channel
  const v = yield* SemVer.parse("1.4.2");
  const range = yield* Range.parse("^1.2.0");

  // Instance methods for comparison, bumping, and matching
  range.test(v);                                              // true
  v.gt(yield* SemVer.parse("1.3.0"));                        // true
  v.compare(yield* SemVer.parse("2.0.0"));                   // -1
  v.bump.minor().toString();                                  // "1.5.0"
  v.isStable;                                                 // true
});

Effect.runSync(program);

Standalone functions are also available for pipe/data-last composition:

import { Effect, pipe } from "effect";
import { SemVer, parseValidSemVer, parseRange, bumpMinor, gt, satisfies } from "semver-effect";

const program = Effect.gen(function* () {
  const v = yield* parseValidSemVer("1.4.2");
  const range = yield* parseRange("^1.2.0");

  satisfies(v, range);                                        // true
  pipe(v, gt(yield* parseValidSemVer("1.3.0")));              // true
  bumpMinor(v).toString();                                    // "1.5.0"
});

Effect.runSync(program);

Documentation

For API reference, Effect integration patterns, migration guides, and SemVer spec compliance details, see docs/.

License

MIT