Sshow signature information if possible (even though signature resolution fails) in given location

Author: sheetalkamat

src/services/services.ts

@@ -2733,7 +2733,12 @@ module ts {
                         var useConstructSignatures = callExpression.kind === SyntaxKind.NewExpression || callExpression.func.kind === SyntaxKind.SuperKeyword;
                         var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
 
-                        if (contains(allSignatures, signature.target || signature)) {
+                        if (!contains(allSignatures, signature.target || signature)) {
+                            // Get the first signature if there 
+                            signature = allSignatures.length ? allSignatures[0] : undefined;
+                        }
+
+                        if (signature) {
                             if (useConstructSignatures && (symbolFlags & SymbolFlags.Class)) {
                                 // Constructor
                                 symbolKind = ScriptElementKind.constructorImplementationElement;

tests/cases/fourslash_old/automaticConstructorToggling.ts renamed to tests/cases/fourslash/automaticConstructorToggling.ts

@@ -26,7 +26,7 @@ goTo.marker('Csig');
 verify.quickInfoIs("(constructor) C<string>(val: string): C<string>");
 
 goTo.marker('Dsig');
-verify.quickInfoIs("(constructor) D<string>(val: string): D<string>");
+verify.quickInfoIs("(constructor) D<T>(val: T): D<T>"); // Cannot resolve signature
 
 goTo.marker(C);
 edit.deleteAtCaret('constructor(val: T) { }'.length);
@@ -37,10 +37,10 @@ goTo.marker('Bsig');
 verify.quickInfoIs("(constructor) B<string>(val: string): B<string>");
 
 goTo.marker('Csig');
-verify.quickInfoIs("(constructor) C<{}>(): C<{}>");
+verify.quickInfoIs("(constructor) C<T>(): C<T>"); // Cannot resolve signature
 
 goTo.marker('Dsig');
-verify.quickInfoIs("(constructor) D<string>(val: string): D<string>");
+verify.quickInfoIs("(constructor) D<T>(val: T): D<T>"); // Cannot resolve signature
 
 goTo.marker(D);
 edit.deleteAtCaret("val: T".length);
@@ -51,7 +51,7 @@ goTo.marker('Bsig');
 verify.quickInfoIs("(constructor) B<string>(val: string): B<string>");
 
 goTo.marker('Csig');
-verify.quickInfoIs("(constructor) C<{}>(): C<{}>");
+verify.quickInfoIs("(constructor) C<T>(): C<T>"); // Cannot resolve signature
 
 goTo.marker('Dsig');
 verify.quickInfoIs("(constructor) D<string>(): D<string>");

tests/cases/fourslash/commentsOverloads.ts

@@ -310,11 +310,11 @@ goTo.marker('18');
 verify.completionListContains('i1', 'interface i1', '');
 verify.completionListContains('i1_i', '(var) i1_i: new i1(b: number) => any (+ 1 overload(s))', '');
 verify.completionListContains('i2', 'interface i2', '');
-verify.completionListContains('i2_i', '(var) i2_i: i2', '');
+verify.completionListContains('i2_i', '(var) i2_i: new i2(a: string) => any (+ 1 overload(s))', '');
 verify.completionListContains('i3', 'interface i3', '');
-verify.completionListContains('i3_i', '(var) i3_i: i3', '');
+verify.completionListContains('i3_i', '(var) i3_i: new i3(a: string) => any (+ 1 overload(s))', 'new 1');
 verify.completionListContains('i4', 'interface i4', '');
-verify.completionListContains('i4_i', '(var) i4_i: i4', '');
+verify.completionListContains('i4_i', '(var) i4_i: new i4(a: string) => any (+ 1 overload(s))', '');
 
 goTo.marker('19');
 verify.currentSignatureHelpDocCommentIs("");