fix(ts): include leading operator in TSUnionType and TSIntersectionType locations (#12757)

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

@@ -935,6 +935,7 @@ export default (superClass: Class<Parser>): Class<Parser> =>
       parseConstituentType: () => N.TsType,
       operator: TokenType,
     ): N.TsType {
+      const node: N.TsUnionType | N.TsIntersectionType = this.startNode();
       this.eat(operator);
       let type = parseConstituentType();
       if (this.match(operator)) {
@@ -942,9 +943,6 @@ export default (superClass: Class<Parser>): Class<Parser> =>
         while (this.eat(operator)) {
           types.push(parseConstituentType());
         }
-        const node: N.TsUnionType | N.TsIntersectionType = this.startNodeAtNode(
-          type,
-        );
         node.types = types;
         type = this.finishNode(node, kind);
       }

packages/babel-parser/test/fixtures/typescript/types/union-intersection/input.ts

@@ -2,3 +2,8 @@ let union: number | null | undefined;
 let intersection: number & string;
 let precedence1: number | string & boolean;
 let precedence2: number & string | boolean;
+
+type J = number | string
+type F = number & string
+type K = | number | string
+type M = & number & string

packages/babel-parser/test/fixtures/typescript/types/union-intersection/output.json

@@ -1,9 +1,9 @@
 {
   "type": "File",
-  "start":0,"end":160,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":43}},
+  "start":0,"end":265,"loc":{"start":{"line":1,"column":0},"end":{"line":9,"column":26}},
   "program": {
     "type": "Program",
-    "start":0,"end":160,"loc":{"start":{"line":1,"column":0},"end":{"line":4,"column":43}},
+    "start":0,"end":265,"loc":{"start":{"line":1,"column":0},"end":{"line":9,"column":26}},
     "sourceType": "module",
     "interpreter": null,
     "body": [
@@ -170,6 +170,98 @@
           }
         ],
         "kind": "let"
+      },
+      {
+        "type": "TSTypeAliasDeclaration",
+        "start":162,"end":186,"loc":{"start":{"line":6,"column":0},"end":{"line":6,"column":24}},
+        "id": {
+          "type": "Identifier",
+          "start":167,"end":168,"loc":{"start":{"line":6,"column":5},"end":{"line":6,"column":6},"identifierName":"J"},
+          "name": "J"
+        },
+        "typeAnnotation": {
+          "type": "TSUnionType",
+          "start":171,"end":186,"loc":{"start":{"line":6,"column":9},"end":{"line":6,"column":24}},
+          "types": [
+            {
+              "type": "TSNumberKeyword",
+              "start":171,"end":177,"loc":{"start":{"line":6,"column":9},"end":{"line":6,"column":15}}
+            },
+            {
+              "type": "TSStringKeyword",
+              "start":180,"end":186,"loc":{"start":{"line":6,"column":18},"end":{"line":6,"column":24}}
+            }
+          ]
+        }
+      },
+      {
+        "type": "TSTypeAliasDeclaration",
+        "start":187,"end":211,"loc":{"start":{"line":7,"column":0},"end":{"line":7,"column":24}},
+        "id": {
+          "type": "Identifier",
+          "start":192,"end":193,"loc":{"start":{"line":7,"column":5},"end":{"line":7,"column":6},"identifierName":"F"},
+          "name": "F"
+        },
+        "typeAnnotation": {
+          "type": "TSIntersectionType",
+          "start":196,"end":211,"loc":{"start":{"line":7,"column":9},"end":{"line":7,"column":24}},
+          "types": [
+            {
+              "type": "TSNumberKeyword",
+              "start":196,"end":202,"loc":{"start":{"line":7,"column":9},"end":{"line":7,"column":15}}
+            },
+            {
+              "type": "TSStringKeyword",
+              "start":205,"end":211,"loc":{"start":{"line":7,"column":18},"end":{"line":7,"column":24}}
+            }
+          ]
+        }
+      },
+      {
+        "type": "TSTypeAliasDeclaration",
+        "start":212,"end":238,"loc":{"start":{"line":8,"column":0},"end":{"line":8,"column":26}},
+        "id": {
+          "type": "Identifier",
+          "start":217,"end":218,"loc":{"start":{"line":8,"column":5},"end":{"line":8,"column":6},"identifierName":"K"},
+          "name": "K"
+        },
+        "typeAnnotation": {
+          "type": "TSUnionType",
+          "start":221,"end":238,"loc":{"start":{"line":8,"column":9},"end":{"line":8,"column":26}},
+          "types": [
+            {
+              "type": "TSNumberKeyword",
+              "start":223,"end":229,"loc":{"start":{"line":8,"column":11},"end":{"line":8,"column":17}}
+            },
+            {
+              "type": "TSStringKeyword",
+              "start":232,"end":238,"loc":{"start":{"line":8,"column":20},"end":{"line":8,"column":26}}
+            }
+          ]
+        }
+      },
+      {
+        "type": "TSTypeAliasDeclaration",
+        "start":239,"end":265,"loc":{"start":{"line":9,"column":0},"end":{"line":9,"column":26}},
+        "id": {
+          "type": "Identifier",
+          "start":244,"end":245,"loc":{"start":{"line":9,"column":5},"end":{"line":9,"column":6},"identifierName":"M"},
+          "name": "M"
+        },
+        "typeAnnotation": {
+          "type": "TSIntersectionType",
+          "start":248,"end":265,"loc":{"start":{"line":9,"column":9},"end":{"line":9,"column":26}},
+          "types": [
+            {
+              "type": "TSNumberKeyword",
+              "start":250,"end":256,"loc":{"start":{"line":9,"column":11},"end":{"line":9,"column":17}}
+            },
+            {
+              "type": "TSStringKeyword",
+              "start":259,"end":265,"loc":{"start":{"line":9,"column":20},"end":{"line":9,"column":26}}
+            }
+          ]
+        }
       }
     ],
     "directives": []