Ensure we find export default declaration targets if we search for them by name

Author: mhegazy

src/compiler/checker.ts

@@ -349,6 +349,13 @@ module ts {
                             }
                             result = undefined;
                         }
+                        else if (location.kind === SyntaxKind.SourceFile) {
+                            result = getSymbol(getSymbolOfNode(location).exports, "default", meaning & SymbolFlags.ModuleMember);
+                            if (result && (result.flags & meaning) && result.valueDeclaration && (result.valueDeclaration.flags & NodeFlags.Default) && result.valueDeclaration.localSymbol.name === name) {
+                                break loop;
+                            }
+                            result = undefined;
+                        }
                         break;
                     case SyntaxKind.EnumDeclaration:
                         if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & SymbolFlags.EnumMember)) {

tests/baselines/reference/es5ExportDefaultClassDeclaration3.js

@@ -0,0 +1,35 @@
+//// [es5ExportDefaultClassDeclaration3.ts]
+
+var before: C = new C();
+
+export default class C {
+    method(): C {
+        return new C();
+    }
+}
+
+var after: C = new C();
+
+var t: typeof C = C;
+
+
+
+//// [es5ExportDefaultClassDeclaration3.js]
+var before = new C();
+var C = (function () {
+    function C() {
+    }
+    C.prototype.method = function () {
+        return new C();
+    };
+    return C;
+})();
+exports.default = C;
+var after = new C();
+var t = C;
+
+
+//// [es5ExportDefaultClassDeclaration3.d.ts]
+export default class C {
+    method(): C;
+}

tests/baselines/reference/es5ExportDefaultClassDeclaration3.types

@@ -0,0 +1,33 @@
+=== tests/cases/compiler/es5ExportDefaultClassDeclaration3.ts ===
+
+var before: C = new C();
+>before : C
+>C : C
+>new C() : C
+>C : typeof C
+
+export default class C {
+>C : C
+
+    method(): C {
+>method : () => C
+>C : C
+
+        return new C();
+>new C() : C
+>C : typeof C
+    }
+}
+
+var after: C = new C();
+>after : C
+>C : C
+>new C() : C
+>C : typeof C
+
+var t: typeof C = C;
+>t : typeof C
+>C : typeof C
+>C : typeof C
+
+

tests/baselines/reference/es5ExportDefaultFunctionDeclaration3.js

@@ -0,0 +1,21 @@
+//// [es5ExportDefaultFunctionDeclaration3.ts]
+
+var before: typeof func = func();
+
+export default function func(): typeof func {
+    return func;
+}
+
+var after: typeof func = func();
+
+//// [es5ExportDefaultFunctionDeclaration3.js]
+var before = func();
+function func() {
+    return func;
+}
+exports.default = func;
+var after = func();
+
+
+//// [es5ExportDefaultFunctionDeclaration3.d.ts]
+export default function func(): typeof func;

tests/baselines/reference/es5ExportDefaultFunctionDeclaration3.types

@@ -0,0 +1,22 @@
+=== tests/cases/compiler/es5ExportDefaultFunctionDeclaration3.ts ===
+
+var before: typeof func = func();
+>before : () => typeof func
+>func : () => typeof func
+>func() : () => typeof func
+>func : () => typeof func
+
+export default function func(): typeof func {
+>func : () => typeof func
+>func : () => typeof func
+
+    return func;
+>func : () => typeof func
+}
+
+var after: typeof func = func();
+>after : () => typeof func
+>func : () => typeof func
+>func() : () => typeof func
+>func : () => typeof func
+

tests/cases/compiler/es5ExportDefaultClassDeclaration3.ts

@@ -0,0 +1,16 @@
+// @target: es5
+// @module: commonjs
+// @declaration: true
+
+var before: C = new C();
+
+export default class C {
+    method(): C {
+        return new C();
+    }
+}
+
+var after: C = new C();
+
+var t: typeof C = C;
+

tests/cases/compiler/es5ExportDefaultFunctionDeclaration3.ts

@@ -0,0 +1,11 @@
+// @target: es5
+// @module: commonjs
+// @declaration: true
+
+var before: typeof func = func();
+
+export default function func(): typeof func {
+    return func;
+}
+
+var after: typeof func = func();