fix(46406): add Template Literal types to decorator metadata serialization (#46913)

src/compiler/transformers/ts.ts

@@ -1511,6 +1511,7 @@ namespace ts {
                 case SyntaxKind.BooleanKeyword:
                     return factory.createIdentifier("Boolean");
 
+                case SyntaxKind.TemplateLiteralType:
                 case SyntaxKind.StringKeyword:
                     return factory.createIdentifier("String");
 

tests/baselines/reference/decoratorOnClassProperty12.js

@@ -0,0 +1,28 @@
+//// [decoratorOnClassProperty12.ts]
+declare function dec(): <T>(target: any, propertyKey: string) => void;
+
+class A {
+    @dec()
+    foo: `${string}`
+}
+
+
+//// [decoratorOnClassProperty12.js]
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+var A = /** @class */ (function () {
+    function A() {
+    }
+    __decorate([
+        dec(),
+        __metadata("design:type", String)
+    ], A.prototype, "foo", void 0);
+    return A;
+}());

tests/baselines/reference/decoratorOnClassProperty12.symbols

@@ -0,0 +1,17 @@
+=== tests/cases/conformance/decorators/class/property/decoratorOnClassProperty12.ts ===
+declare function dec(): <T>(target: any, propertyKey: string) => void;
+>dec : Symbol(dec, Decl(decoratorOnClassProperty12.ts, 0, 0))
+>T : Symbol(T, Decl(decoratorOnClassProperty12.ts, 0, 25))
+>target : Symbol(target, Decl(decoratorOnClassProperty12.ts, 0, 28))
+>propertyKey : Symbol(propertyKey, Decl(decoratorOnClassProperty12.ts, 0, 40))
+
+class A {
+>A : Symbol(A, Decl(decoratorOnClassProperty12.ts, 0, 70))
+
+    @dec()
+>dec : Symbol(dec, Decl(decoratorOnClassProperty12.ts, 0, 0))
+
+    foo: `${string}`
+>foo : Symbol(A.foo, Decl(decoratorOnClassProperty12.ts, 2, 9))
+}
+

tests/baselines/reference/decoratorOnClassProperty12.types

@@ -0,0 +1,17 @@
+=== tests/cases/conformance/decorators/class/property/decoratorOnClassProperty12.ts ===
+declare function dec(): <T>(target: any, propertyKey: string) => void;
+>dec : () => <T>(target: any, propertyKey: string) => void
+>target : any
+>propertyKey : string
+
+class A {
+>A : A
+
+    @dec()
+>dec() : <T>(target: any, propertyKey: string) => void
+>dec : () => <T>(target: any, propertyKey: string) => void
+
+    foo: `${string}`
+>foo : string
+}
+

tests/cases/conformance/decorators/class/property/decoratorOnClassProperty12.ts

@@ -0,0 +1,9 @@
+// @target: es5
+// @experimentaldecorators: true
+// @emitdecoratormetadata: true
+declare function dec(): <T>(target: any, propertyKey: string) => void;
+
+class A {
+    @dec()
+    foo: `${string}`
+}