Type support checklist ✅

[danieldelcore]

The way ERT evaluates complex types and language specific features is largely a manual process. We have to manually tell ERT how to interpret things like extends and React.FC<P>, so inevitably there will be things that we don't support or haven't considered.

This issue aims to track what features we do and don't support and in cases where a feature is unsupported, we hope to provide a suitable bail-out, similar to what is suggested here #141

If there's something missing on this list, please leave a comment below 😄

TypeScript

• primitive types boolean, array, string, number ✅
• any ✅
• unknown ✅
• void ✅
• functions ✅
• array[] & Array<> ✅
• interfaces ✅
• types type foo = string ✅
• union types 'foo' | 'bar' ✅
• intersection types Foo & Bar ✅
• extends ✅
• keyof ❌
• as ❌
• template literal types ❌
• index signatures ❌
• conditional types ❌

TypeScript utility types

• Omit<> ❌
• Partial<> ❌
• Record<> ❌
• Pick<> ❌
• ReturnType<> ❌

TypeScript via @types/react

• React.FC<Props> ✅
• React.memo<Props> ✅
• React.forwardRef<ElementType, Props> ✅

Flow

TBD

Related issues

#59
#141