Emit pinned/tripleslash reference comments of signatures

Fixes #501

tests/baselines/reference/commentOnSignature1.js

@@ -1,11 +1,51 @@
-//// [commentOnSignature1.ts]
+//// [tests/cases/compiler/commentOnSignature1.ts] ////
+
+//// [a.ts]
 /*! Keep this pinned comment */
 function foo(n: number): void;
 // Don't keep this comment.
 function foo(s: string): void;
 function foo(a: any): void {
+}
+
+class c {
+    // dont keep this comment
+    constructor(a: string);
+    /*! keep this pinned comment */
+    constructor(a: number);
+    constructor(a: any) {
+    }
+
+    // dont keep this comment
+    foo(a: string);
+    /*! keep this pinned comment */
+    foo(a: number);
+    foo(a: any) {
+    }
+}
+
+//// [b.ts]
+///<reference path='a.ts'/>
+function foo2(n: number): void;
+// Don't keep this comment.
+function foo2(s: string): void;
+function foo2(a: any): void {
 }
 
-//// [commentOnSignature1.js]
+//// [a.js]
+/*! Keep this pinned comment */
 function foo(a) {
 }
+var c = (function () {
+    /*! keep this pinned comment */
+    function c(a) {
+    }
+    /*! keep this pinned comment */
+    c.prototype.foo = function (a) {
+    };
+    return c;
+})();
+//// [b.js]
+///<reference path='a.ts'/>
+function foo2(a) {
+}

tests/baselines/reference/commentOnSignature1.types

@@ -1,4 +1,19 @@
-=== tests/cases/compiler/commentOnSignature1.ts ===
+=== tests/cases/compiler/b.ts ===
+///<reference path='a.ts'/>
+function foo2(n: number): void;
+>foo2 : { (n: number): void; (s: string): void; }
+>n : number
+
+// Don't keep this comment.
+function foo2(s: string): void;
+>foo2 : { (n: number): void; (s: string): void; }
+>s : string
+
+function foo2(a: any): void {
+>foo2 : { (n: number): void; (s: string): void; }
+>a : any
+}
+=== tests/cases/compiler/a.ts ===
 /*! Keep this pinned comment */
 function foo(n: number): void;
 >foo : { (n: number): void; (s: string): void; }
@@ -13,3 +28,35 @@ function foo(a: any): void {
 >foo : { (n: number): void; (s: string): void; }
 >a : any
 }
+
+class c {
+>c : c
+
+    // dont keep this comment
+    constructor(a: string);
+>a : string
+
+    /*! keep this pinned comment */
+    constructor(a: number);
+>a : number
+
+    constructor(a: any) {
+>a : any
+    }
+
+    // dont keep this comment
+    foo(a: string);
+>foo : { (a: string): any; (a: number): any; }
+>a : string
+
+    /*! keep this pinned comment */
+    foo(a: number);
+>foo : { (a: string): any; (a: number): any; }
+>a : number
+
+    foo(a: any) {
+>foo : { (a: string): any; (a: number): any; }
+>a : any
+    }
+}
+

tests/cases/compiler/commentOnSignature1.ts

@@ -1,6 +1,31 @@
+// @filename: a.ts
 /*! Keep this pinned comment */
 function foo(n: number): void;
 // Don't keep this comment.
 function foo(s: string): void;
 function foo(a: any): void {
+}
+
+class c {
+    // dont keep this comment
+    constructor(a: string);
+    /*! keep this pinned comment */
+    constructor(a: number);
+    constructor(a: any) {
+    }
+
+    // dont keep this comment
+    foo(a: string);
+    /*! keep this pinned comment */
+    foo(a: number);
+    foo(a: any) {
+    }
+}
+
+//@filename:b.ts
+///<reference path='a.ts'/>
+function foo2(n: number): void;
+// Don't keep this comment.
+function foo2(s: string): void;
+function foo2(a: any): void {
 }