THIS IS CURRENTLY JUST A PROOF OF CONCEPT

Generate type guards by analysing typescript interfaces.

• support all primitive types
• null, undefinied, unkown
• support complex types by convention
• support complex types by traversing import
• add optional types
• enums
• ignore type any
• test with public keyword
• test readonly keyword
• ignore private properties
• generics
• generics as property
• arrays primitive/ complex
• array vs T[]
• union types
• files with multiple interfaces
• files with exported interface and not exported interface
• files with interfaces and other code

• OS independent SEPARATOR and so on
• OS independent build scripts

• use schematics
• use glob as input
• primitive types as infile check vs import
• custom file suffix (currently it's .guard.ts)
• write tests with fsify

• support of methods exists?
• in declare module? or do we ignore .d.ts for now?
• should not exported interfaces be ignored?
• can we support complex inline types {foo: string}
  • [key: string]: any;
  • [hub: string]: Hub; <== what's that?
• namespaced types
  • import * as fromAuth
  • import foo as fromAuth