V8intrinsic syntax plugin (#10148)

* 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

packages/babel-parser/src/tokenizer/types.js

@@ -148,7 +148,8 @@ export const types: { [name: string]: TokenType } = {
   relational: createBinop("</>/<=/>=", 8),
   bitShift: createBinop("<</>>/>>>", 9),
   plusMin: new TokenType("+/-", { beforeExpr, binop: 10, prefix, startsExpr }),
-  modulo: createBinop("%", 11),
+  // startsExpr: required by v8intrinsic plugin
+  modulo: new TokenType("%", { beforeExpr, binop: 11, startsExpr }),
   star: createBinop("*", 11),
   slash: createBinop("/", 11),
   exponent: new TokenType("**", {