sweet.js macros

[KiaraGrouwstra]

why: DRY, boosts expressiveness. if that sounds like "just syntactic sugar", that's what programming languages do.

• integrate with webpack
• integrate with jspm
• lambda shortcut
• check punctuation list for this macro
• wanted macros (doable):
  • immutable mutations (_: x = x |> _.blah(pars), Imm: x = x.blah)
    • actually less bad in store already
  • Store/Redux action: action(DEL_TODO, deleteTodo(id)) -> export const DEL_TODO = 'DEL_TODO'; export deleteTodo = (id) => ({ type: DEL_TODO, id })
  • getter: problem is macros can only be in statement/expression position; workarounds:
    • use assigned methods with initial babel pass?
      • can these really do get/set?
    • use class macro, add assigned methods to ditch babel?
  • setter: see getter.
  • pattern matching
    • old implementation used infix macros, huge code (if only few macro bits?)
    • combine comb macro's matching with destructuring (casep) and matching of predefined values
      • iterate over literals/variables (if declared check match, otherwise assign)
      • one try-assign pass for the check, another after to assign and return the result
      • if/unless guards
• macros needing infix:
  • pipe
  • elvis: ?. / ?.[] / ?.['fixed', variable]
  • reverse assignment (<-)
  • await -- old macro
  • fakeAwait: from let a = fakeAwait PROM; to let a; PROM.then(x => { a = x; }); flushMicrotasks();

BLOCKED BY:

• Sweet.js infix
• TS support