Missing language features

[SebastianWendorf]

Things to consider:

• destructuring assignment with variable declarations
• parameter destructuring
• re-exports
• namespaces
• function/method overloads
• async functions/methods
• class values (assigned to variables)
• typeof type
• named tuples
• this parameter in functions
• default parameters
• new expression as ValueCall
• rest element types and values (Link)
• computed member expressions
• new decorator standard
  • decorators may be written before or after export keyword
  • parameter can only be decorated with legacy system (will change in the future)
• auto accessors
  • initial value of auto accessors
• const type parameters
• satisfies keyword
• index signatures in object types
• callable types in object types
• recursive types (e.g. _DeepPartialObject)
• generator functions
• conditional types
• instantiation expressions for generic functions