fix: allow bigInt in method name and TSLiteralType (#11547)

* refactor: add isLiteralPropertyName to parser utils

* address review comments [skip-ci]

* refactor: keyword is valid identifierName

* fix: allow bigint in TSLiteralType

* update typescript test whitelist

packages/babel-parser/src/parser/expression.js

@@ -1553,11 +1553,8 @@ export default class ExpressionParser extends LValParser {
       !prop.computed &&
       prop.key.type === "Identifier" &&
       prop.key.name === "async" &&
-      (this.match(tt.name) ||
-        this.match(tt.num) ||
-        this.match(tt.string) ||
+      (this.isLiteralPropertyName() ||
         this.match(tt.bracketL) ||
-        this.state.type.keyword ||
         this.match(tt.star)) &&
       !this.hasPrecedingLineBreak()
     );
@@ -1646,11 +1643,8 @@ export default class ExpressionParser extends LValParser {
       !prop.computed &&
       prop.key.type === "Identifier" &&
       (prop.key.name === "get" || prop.key.name === "set") &&
-      (this.match(tt.string) || // get "string"() {}
-      this.match(tt.num) || // get 1() {}
-      this.match(tt.bracketL) || // get ["string"]() {}
-      this.match(tt.name) || // get foo() {}
-        !!this.state.type.keyword) // get debugger() {}
+      (this.isLiteralPropertyName() || // get foo() {}
+        this.match(tt.bracketL)) // get ["string"]() {}
     );
   }
 

packages/babel-parser/src/parser/util.js

@@ -259,6 +259,25 @@ export default class UtilParser extends Tokenizer {
       this.raise(doubleProto, Errors.DuplicateProto);
     }
   }
+
+  /**
+   * Test if current token is a literal property name
+   * https://tc39.es/ecma262/#prod-LiteralPropertyName
+   * LiteralPropertyName:
+   *   IdentifierName
+   *   StringLiteral
+   *   NumericLiteral
+   *   BigIntLiteral
+   */
+  isLiteralPropertyName(): boolean {
+    return (
+      this.match(tt.name) ||
+      !!this.state.type.keyword ||
+      this.match(tt.string) ||
+      this.match(tt.num) ||
+      this.match(tt.bigint)
+    );
+  }
 }
 
 /**

packages/babel-parser/src/plugins/typescript/index.js

@@ -691,6 +691,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       node.literal = (() => {
         switch (this.state.type) {
           case tt.num:
+          case tt.bigint:
           case tt.string:
           case tt._true:
           case tt._false:
@@ -747,13 +748,15 @@ export default (superClass: Class<Parser>): Class<Parser> =>
         }
         case tt.string:
         case tt.num:
+        case tt.bigint:
         case tt._true:
         case tt._false:
           return this.tsParseLiteralTypeNode();
         case tt.plusMin:
           if (this.state.value === "-") {
             const node: N.TsLiteralType = this.startNode();
-            if (this.lookahead().type !== tt.num) {
+            const nextToken = this.lookahead();
+            if (nextToken.type !== tt.num && nextToken.type !== tt.bigint) {
               throw this.unexpected();
             }
             node.literal = this.parseMaybeUnary();