Suggestion Backlog Slog, 6/8/2016

[RyanCavanaugh]

• Suggestion: Only create global variable for module if something tangible is exported #8668 Only create global variable for module if something tangible is exported
• Bug: Accessing private statics in a class via its derived class is allowed #8624 Accessing private statics in a class via its derived class is allowed
• Should awaiting a non-Promise value be an error? #8310 Should awaiting a non-Promise value be an error?
• Do not rename imports from ambient modules #8227 Do not rename imports from ambient modules
• Suggestion: stricter operators #7989 Stricter binary operators
• Make exported consts better minifiable #7565 Make exported consts better minifiable
• make the strict equality comparison operator a typeguard for string literal types #7447 make the strict equality comparison operator a typeguard for string literal types
• Consider re-ordering Array#reduce overloads in lib.d.ts #7014 Consider re-ordering Array#reduce overloads in lib.d.ts
• Support override keyword on class methods #2000 Support override keyword on class methods
• No compile error thrown when this referenced before call to super completes #8060 Re-order emit of var _this = this when arrow func appears in super call
• Allow ArrayLike as a spread source #7596 Allow ArayLike as a spread source (and figure out emit semantics)
• Extended type parameters don't work as constraints with overloads #7378 Extended type parameters don't work as constraints with overloads

[RyanCavanaugh]

• Suggestion: Only create global variable for module if something tangible is exported #8668 Only create global variable for module if something tangible is exported
  • Why not use an IIFE?
    • Qualification
  • Does future extension matter?
    • Don't see why
  • Too complex; workaround exists
• Bug: Accessing private statics in a class via its derived class is allowed #8624 Accessing private statics in a class via its derived class is allowed
  • Agree
  • Breaking change
• Should awaiting a non-Promise value be an error? #8310 Should awaiting a non-Promise value be an error?
  • No
  • It's sometimes useful
  • Also OK because consistency with union types
    • And generics
• Do not rename imports from ambient modules #8227 Do not rename imports from ambient modules
  • Agree
  • User must write alias and then rename
  • Fix is to restrict syntactic forms of rename invocation sites
• Suggestion: stricter operators #7989 Stricter binary operators
  • Clearly suspect for numeric/bitwise operands; make these an error
  • string + [whatever] is still OK, or at least less clear
  • What about add an option that flags coercion #7746?
    • Proposal: Disallow implicit truthiness checks for non-null types in strictNullChecks mode?
      • What constitutes a truthiness operand?
        • if and other control flow expressions, and the left operand of || / &&, operand of !
    • Other behavior listed here is idiomatic
• Make exported consts better minifiable #7565 Make exported consts better minifiable
  • 👍 and wait for new emitter to land
• make the strict equality comparison operator a typeguard for string literal types #7447 make the strict equality comparison operator a typeguard for string literal types
  • Breaking change: This would (badly) restrict the domain of variables whose type was inferred from value
  • 👎 without use cases to justify break
• Consider re-ordering Array#reduce overloads in lib.d.ts #7014 Consider re-ordering Array#reduce overloads in lib.d.ts
  • Try it and see wha thappens
• Support override keyword on class methods #2000 Support override keyword on class methods
  • What about override properties?
    • Sure, no reason not to
  • --noImplicitOverride means what you think it does
    • Should this apply to declaration files?
      • Argument for yes: correctness for the same reason
      • Argument for no: convenience, no need to mess with declaration emitter
      • If no: Declaration emitter will need to emit override modifier (same way any works) if one was not present explicitly
      • Decision: Not enforced
  • Nothing for interface implementations at this time
  • No special type behavior at this time
  • Accepting PRs
• No compile error thrown when this referenced before call to super completes #8060 Re-order emit of var _this = this when arrow func appears in super call
  • 👍, Community
• Extended type parameters don't work as constraints with overloads #7378 Extended type parameters don't work as constraints with overloads
  • Overload/implementation signature checking is already pretty bad anyway
  • Too Complex

Out of time

• Allow ArrayLike as a spread source #7596 Allow ArrayLike as a spread source (and figure out emit semantics)

[RyanCavanaugh]

#7746 (use of known-true/known-false values in truthiness positions) moved to #9041