pragmas gem / library - language syntax pragmas - turn on the future today or add your own ideas for easy (re)use for everyone - let's evolve the ruby language together by experimenting in the wild in a pragma(tic) way

(Gerald Bauer) #1

Hello,

  I've put together a new pragmas gem / library [1] for language syntax pragmas
that lets you turn on the future today or add your own ideas for easy
(re)use for everyone.

  Let's evolve the ruby language together by experimenting in the wild
in a pragma(tic) way.

  First language syntax pragmas include match patterns, enum and type
types, auto numbered arguments, and more. Example:

Pattern Matcher

Will replace (transform) lines starting with

> None    =>
> Some(x) =>

to

None: ->()
Some: ->(x)

Example in the wild:

match Map.find( Current.sender, account_from.allowances ), {
      > None          => { failwith( "Not allowed to spend from", from ) },
      > Some(allowed) => {
        match is_nat(allowed - tokens), {
          > None          => { failwith( "Not enough allowance for
transfer", allowed ) },
          > Some(allowed) => {
            if allowed == 0.p
              Map.remove( Current.sender, account_from.allowances )
            else
              Map.add( Current.sender, allowed, account_from.allowances )
            end
          }
        }
      }
    }

turns into:

match Map.find( Current.sender, account_from.allowances ), {
      None: ->()        { failwith( "Not allowed to spend from", from ) },
      Some: ->(allowed) {
        match is_nat(allowed - tokens), {
          None: ->() { failwith( "Not enough allowance for transfer",
allowed ) },
          Some: ->(allowed) {
            if allowed == 0.p
              Map.remove( Current.sender, account_from.allowances )
            else
              Map.add( Current.sender, allowed, account_from.allowances )
            end
          }
        }
      }
    }

Enum

Will replace (transform) lines starting with

enum Color = Red | Green | Blue
enum State = Fundraising | ExpiredRefund | Successful   # or
enum State = Fundraising
           > ExpiredRefund
           > Successful

to

enum :Color, :red, :green, :blue
enum :State, :fundraising, :expired_refund, :successful

  What's your idea / pragma? Yes, you can.

  Happy coding in (future) ruby with pragmas. Cheers. Prost.

[1] https://github.com/s6ruby/pragmas

0 Likes

(Gerald Bauer) #2

Hello,

  I've added 10+ more language syntax pragmas for ruby. The pragmas now include:

- Pattern Matcher
- Enum Type
- (Algebraic) Union Data Types (with Variants)
- Type Type
- Pretty Symbol Keys
- Struct Type
- Option / Maybe / Nullable
- Natural / Positive Integer Numbers
- Storage / State
- Auto Numbered Block Arguments / Parameters
- Do End-of-Line Block
- Typed Data Structures
- Typed Arrays
- Preprocessor Directives

   What's your idea / pragma? Yes, you can.

   Happy coding with (future) ruby with pragmas. Cheers. Prost.

0 Likes