export imported aliases

src/compiler/emitter.ts

@@ -5026,6 +5026,30 @@ var __param = this.__param || function(index, decorator) { return function (targ
                             writeLocalNameForExternalImport(importNode);
                             write(` = ${setterParameterName}`);
                             writeLine();
+
+                            let defaultName =
+                                importNode.kind === SyntaxKind.ImportDeclaration
+                                    ? (<ImportDeclaration>importNode).importClause.name
+                                    : (<ImportEqualsDeclaration>importNode).name;
+                            if (defaultName) {
+                                emitExportMemberAssignments(defaultName);
+                                writeLine();
+                            }
+
+                            if (importNode.kind === SyntaxKind.ImportDeclaration && (<ImportDeclaration>importNode).importClause.namedBindings) {
+                                if ((<ImportDeclaration>importNode).importClause.namedBindings.kind === SyntaxKind.NamespaceImport) {
+                                    emitExportMemberAssignments((<NamespaceImport>(<ImportDeclaration>importNode).importClause.namedBindings).name);
+                                    writeLine();
+                                }
+                                else {
+                                    for (let element of (<NamedImports>(<ImportDeclaration>importNode).importClause.namedBindings).elements) {
+                                        emitExportMemberAssignments(element.name || element.propertyName);
+                                        writeLine()
+                                    }
+                                }
+                            }
+
+
                             decreaseIndent();
                             break;
                         case SyntaxKind.ExportDeclaration:

tests/baselines/reference/systemModule10.errors.txt

@@ -0,0 +1,18 @@
+tests/cases/compiler/systemModule10.ts(2,20): error TS2307: Cannot find external module 'file1'.
+tests/cases/compiler/systemModule10.ts(3,21): error TS2307: Cannot find external module 'file2'.
+
+
+==== tests/cases/compiler/systemModule10.ts (2 errors) ====
+    
+    import n, {x} from 'file1'
+                       ~~~~~~~
+!!! error TS2307: Cannot find external module 'file1'.
+    import n2 = require('file2');
+                        ~~~~~~~
+!!! error TS2307: Cannot find external module 'file2'.
+    export {x}
+    export {x as y}
+    export {n}
+    export {n as n1}
+    export {n2}
+    export {n2 as n3}

tests/baselines/reference/systemModule10.js

@@ -0,0 +1,32 @@
+//// [systemModule10.ts]
+
+import n, {x} from 'file1'
+import n2 = require('file2');
+export {x}
+export {x as y}
+export {n}
+export {n as n1}
+export {n2}
+export {n2 as n3}
+
+//// [systemModule10.js]
+System.register(['file1', 'file2'], function(exports_1) {
+    var file1_1, n2;
+    return {
+        setters:[
+            function (v_1) {
+                file1_1 = v_1
+                exports_1("n", file1_1.default);
+                exports_1("n1", file1_1.default);
+                exports_1("x", file1_1.x);
+                exports_1("y", file1_1.x);
+            },
+            function (v_1) {
+                n2 = v_1
+                exports_1("n2", n2);
+                exports_1("n3", n2);
+            }],
+        execute: function() {
+        }
+    }
+});

tests/cases/compiler/systemModule10.ts

@@ -0,0 +1,11 @@
+// @module: system
+// @separateCompilation: true
+
+import n, {x} from 'file1'
+import n2 = require('file2');
+export {x}
+export {x as y}
+export {n}
+export {n as n1}
+export {n2}
+export {n2 as n3}