dkodaj/decgen

Elm decoder generator

Elm decoder generator

Builds JSON decoders and encoders for your Elm types.

Usage: in the browser

Copy/paste your type definitions into the live version.

Cli version

Check out FranzSkuffka's command line tool.

decgen's Issues

Use elm/parser and add unit tests

There is an elm-in-elm compiler. They are using elm/parser and only that.

If decgen uses elm/parser we could contribute to and benefit from elm-in-elm/compiler

More info: elm-in-elm/compiler#26

Extensible types

decgen is choking on extensible types.

Input

type alias LineConfiguration_ a = {a | paint : PaintCode, rim : RimCode, engine : EngineId}
type alias LineConfiguration = LineConfiguration_ {}
type alias Configuration = LineConfiguration_ {line : LineCode}

Expected

type alias Record_LineConfiguration = {paint : PaintCode, rim : RimCode, engine : EngineId}
type alias Record_Configuration = {line : LineCode, paint : PaintCode, rim : RimCode, engine : EngineId}

Result

type alias Record_line_LineCode_ = {line: LineCode}
type alias Record___ = {: }

Dealing with imported types

What are the suggested strategies for dealing with imported types?

The CLI I wrote just reads one file.

Should we also get the imported modules and Concatenate them? What strategy do you suggest?

Union Type support

Any chance to get union type support in this?

Broken for union types

https://dkodaj.github.io/decgen seems broken for union types - there is simply no output for type A = B | C