Merge pull request #12386 from mariusschulz/union-and-intersection-types-with-leading-operator

Union and intersection types with leading operator

src/compiler/parser.ts

@@ -2558,6 +2558,8 @@ namespace ts {
                 case SyntaxKind.OpenBraceToken:
                 case SyntaxKind.OpenBracketToken:
                 case SyntaxKind.LessThanToken:
+                case SyntaxKind.BarToken:
+                case SyntaxKind.AmpersandToken:
                 case SyntaxKind.NewKeyword:
                 case SyntaxKind.StringLiteral:
                 case SyntaxKind.NumericLiteral:
@@ -2617,6 +2619,7 @@ namespace ts {
         }
 
         function parseUnionOrIntersectionType(kind: SyntaxKind, parseConstituentType: () => TypeNode, operator: SyntaxKind): TypeNode {
+            parseOptional(operator);
             let type = parseConstituentType();
             if (token() === operator) {
                 const types = createNodeArray<TypeNode>([type], type.pos);

tests/baselines/reference/intersectionTypeWithLeadingOperator.js

@@ -0,0 +1,10 @@
+//// [intersectionTypeWithLeadingOperator.ts]
+type A = & string;
+type B =
+  & { foo: string }
+  & { bar: number };
+
+type C = [& { foo: 1 } & { bar: 2 }, & { foo: 3 } & { bar: 4 }];
+
+
+//// [intersectionTypeWithLeadingOperator.js]

tests/baselines/reference/intersectionTypeWithLeadingOperator.symbols

@@ -0,0 +1,20 @@
+=== tests/cases/compiler/intersectionTypeWithLeadingOperator.ts ===
+type A = & string;
+>A : Symbol(A, Decl(intersectionTypeWithLeadingOperator.ts, 0, 0))
+
+type B =
+>B : Symbol(B, Decl(intersectionTypeWithLeadingOperator.ts, 0, 18))
+
+  & { foo: string }
+>foo : Symbol(foo, Decl(intersectionTypeWithLeadingOperator.ts, 2, 5))
+
+  & { bar: number };
+>bar : Symbol(bar, Decl(intersectionTypeWithLeadingOperator.ts, 3, 5))
+
+type C = [& { foo: 1 } & { bar: 2 }, & { foo: 3 } & { bar: 4 }];
+>C : Symbol(C, Decl(intersectionTypeWithLeadingOperator.ts, 3, 20))
+>foo : Symbol(foo, Decl(intersectionTypeWithLeadingOperator.ts, 5, 13))
+>bar : Symbol(bar, Decl(intersectionTypeWithLeadingOperator.ts, 5, 26))
+>foo : Symbol(foo, Decl(intersectionTypeWithLeadingOperator.ts, 5, 40))
+>bar : Symbol(bar, Decl(intersectionTypeWithLeadingOperator.ts, 5, 53))
+

tests/baselines/reference/intersectionTypeWithLeadingOperator.types

@@ -0,0 +1,20 @@
+=== tests/cases/compiler/intersectionTypeWithLeadingOperator.ts ===
+type A = & string;
+>A : string
+
+type B =
+>B : B
+
+  & { foo: string }
+>foo : string
+
+  & { bar: number };
+>bar : number
+
+type C = [& { foo: 1 } & { bar: 2 }, & { foo: 3 } & { bar: 4 }];
+>C : [{ foo: 1; } & { bar: 2; }, { foo: 3; } & { bar: 4; }]
+>foo : 1
+>bar : 2
+>foo : 3
+>bar : 4
+

tests/baselines/reference/unionTypeWithLeadingOperator.js

@@ -0,0 +1,10 @@
+//// [unionTypeWithLeadingOperator.ts]
+type A = | string;
+type B =
+  | { type: "INCREMENT" }
+  | { type: "DECREMENT" };
+
+type C = [| 0 | 1, | "foo" | "bar"];
+
+
+//// [unionTypeWithLeadingOperator.js]

tests/baselines/reference/unionTypeWithLeadingOperator.symbols

@@ -0,0 +1,16 @@
+=== tests/cases/compiler/unionTypeWithLeadingOperator.ts ===
+type A = | string;
+>A : Symbol(A, Decl(unionTypeWithLeadingOperator.ts, 0, 0))
+
+type B =
+>B : Symbol(B, Decl(unionTypeWithLeadingOperator.ts, 0, 18))
+
+  | { type: "INCREMENT" }
+>type : Symbol(type, Decl(unionTypeWithLeadingOperator.ts, 2, 5))
+
+  | { type: "DECREMENT" };
+>type : Symbol(type, Decl(unionTypeWithLeadingOperator.ts, 3, 5))
+
+type C = [| 0 | 1, | "foo" | "bar"];
+>C : Symbol(C, Decl(unionTypeWithLeadingOperator.ts, 3, 26))
+

tests/baselines/reference/unionTypeWithLeadingOperator.types

@@ -0,0 +1,16 @@
+=== tests/cases/compiler/unionTypeWithLeadingOperator.ts ===
+type A = | string;
+>A : string
+
+type B =
+>B : B
+
+  | { type: "INCREMENT" }
+>type : "INCREMENT"
+
+  | { type: "DECREMENT" };
+>type : "DECREMENT"
+
+type C = [| 0 | 1, | "foo" | "bar"];
+>C : [0 | 1, "foo" | "bar"]
+

tests/cases/compiler/intersectionTypeWithLeadingOperator.ts

@@ -0,0 +1,6 @@
+type A = & string;
+type B =
+  & { foo: string }
+  & { bar: number };
+
+type C = [& { foo: 1 } & { bar: 2 }, & { foo: 3 } & { bar: 4 }];

tests/cases/compiler/unionTypeWithLeadingOperator.ts

@@ -0,0 +1,6 @@
+type A = | string;
+type B =
+  | { type: "INCREMENT" }
+  | { type: "DECREMENT" };
+
+type C = [| 0 | 1, | "foo" | "bar"];