Candidates for possible Typescript AST transformations

[zspitz]

• Constructor syntax

  var wdApp = new Word.Application();
  

  would map to

  var wdApp = new ActiveXObject('Word.Application');
  

• Event handlers (using https://github.com/zspitz/activex-js-events) Generate declarations for event handling #16

  wdApp.on('Quit', function(params) { ... });
  

  would map to

  ActiveXObject.on(wdApp, 'Quit', [], function(params) { ... });
  

• Property setters with parameters, which are invalid Typescript Generate property setters with parameters #15

  var dict = new ActiveXObject('Scripting.Dictionary');
  dict.Item('a') = 'Athens';
  

  would map to a helper function:

  ActiveXObject.set(dict, 'Item', ['a'], 'Athens');`
  

• Indexers

  var athens = dict['Athens'];
  

  would map to something like

  var athens = dict.Item('Athens');
  

  This would have to handle the difference between 0-based and 1-based collections, and also sometimes where the key is not a number or string

microsoft/TypeScript#6508

[zspitz]

Simulate default properties:

var rst: DAO.Recordset;
var lastName: string = rst('LastName');

would map to

var rst: DAO.Recordset;
var lastName: string = rst.Fields('LastName').Value;

because we know the type of lastName, we can step through the default property chain (Fields, Value) until we reach a compatible property. Alternatively, the default property chain should be followed until the end, and lastName would have the type of .Value.