v1.13.0

Potentially breaking changes:

• Changed the API interface of dispatch(). The previous version was too complicated and was hardly used. The new version is easier to use in practice, and has better type inference support in TypeScript and Flow.

  Previous usage:

  const shape = dispatch(
      field('type', string),
      type => {
          switch (type) {
              case 'rect': return rectangle;
              case 'circle': return circle;
          }
          return fail('Must be a valid shape');
      }
  );
  

  New usage: docs

  const shape = dispatch('type', { rectangle, circle });
  

  Where rectangle and circle are decoders of which exactly one will be invoked.

• Removed the field() decoder. It was not generic enough to stay part of the standard decoder library. (It was typically used in combination with dispatch(), which now isn't needed anymore, see above.)

• pojo decoder now returns Decoder<{[string]: mixed}> instead of the unsafe Decoder<Object>.

Fixes and cleanup:

• Internal reorganization of modules
• Improve TypeScript support
  • Reorganization of TypeScript declarations
  • More robust test suite for TypeScript
  • 100% TypeScript test coverage