This adds lots of missing declarations to the types of @babel/types,
including many utility functions useful to plugin authors.
With the typescript types, I tried to make them as useful as possible
for control flow analysis / inference, but Flow doesn't seem to
support overloads and I'm not as familiar with it anyway so it has
simpler types.
Flow maybe types state;
> Maybe types accept the provided type as well as null or undefined. So ?number would mean number, null, or undefined.
So in this case, explicitly allow the type, null, or undefined in the
typescript definition.
Fixes#10403
* feat: v8intrinsic syntax plugin
Implement V8 Intrinsic Syntax Extension. Here we check the execution branch inside the parseSubscript to make sure the V8IntrinsicIdentifier is immediately followed by a call expression.
* feat: disable combining placeholders and v8intrisic
per https://github.com/babel/babel/issues/10104#issuecomment-506950969
* test: add more error cases
* refactor: parse v8 intrinsic in parseExprAtom
This approach is identical to V8’s implementation. Move the test cases as the behaviour changes.
* fix: plugin-name typo
* test: add yield-expression test case
* feat: require startsExpr on modulo for v8intrinsic
* perf: skip eof and braceR check as they must return false
* Print V8IntrinsicIdentifier
* feat: add v8intrinsic to parser typings
* Add generated type helpers
* fix: incorrect type definition
* fix: allow V8IntrinsicIdentifier to be callee
* babel-types is* type checks accept null | undefiend as value TS type
* Use | null | undefined instead of any, make Flow type nullable
* Also change flow types of generated src
