Added an error condition for duplicate AMD module name assignments.

Author: gisenberg

src/compiler/diagnosticInformationMap.generated.ts

@@ -270,6 +270,7 @@ module ts {
         Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: DiagnosticCategory.Error, key: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
         Type_alias_0_circularly_references_itself: { code: 2456, category: DiagnosticCategory.Error, key: "Type alias '{0}' circularly references itself." },
         Type_alias_name_cannot_be_0: { code: 2457, category: DiagnosticCategory.Error, key: "Type alias name cannot be '{0}'" },
+        A_module_cannot_have_multiple_AMD_module_names: { code: 2458, category: DiagnosticCategory.Error, key: "A module cannot have multiple AMD module names." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: DiagnosticCategory.Error, key: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4001, category: DiagnosticCategory.Error, key: "Type parameter '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: DiagnosticCategory.Error, key: "Type parameter '{0}' of exported class has or is using private name '{1}'." },

src/compiler/diagnosticMessages.json

@@ -1076,6 +1076,10 @@
         "category": "Error",
         "code": 2457
     },
+    "A module cannot have multiple AMD module names.": {
+        "category": "Error",
+        "code": 2458
+    },
 
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",

src/compiler/parser.ts

@@ -4242,6 +4242,9 @@ module ts {
                     var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
                     var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
                     if(amdModuleNameMatchResult) {
+                        if(amdModuleName) {
+                            errorAtPos(range.pos, range.end - range.pos, Diagnostics.A_module_cannot_have_multiple_AMD_module_names);
+                        }
                         amdModuleName = amdModuleNameMatchResult[2];
                     }
 

tests/baselines/reference/amdModuleName2.errors.txt

@@ -0,0 +1,16 @@
+tests/cases/compiler/amdModuleName2.ts(2,1): error TS2458: A module cannot have multiple AMD module names.
+
+
+==== tests/cases/compiler/amdModuleName2.ts (1 errors) ====
+    ///<amd-module name='FirstModuleName'/>
+    ///<amd-module name='SecondModuleName'/>
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2458: A module cannot have multiple AMD module names.
+    class Foo {
+        x: number;
+        constructor() {
+            this.x = 5;
+        }
+    }
+    export = Foo;
+    

tests/cases/compiler/amdModuleName2.ts

@@ -0,0 +1,10 @@
+//@module: amd
+///<amd-module name='FirstModuleName'/>
+///<amd-module name='SecondModuleName'/>
+class Foo {
+    x: number;
+    constructor() {
+        this.x = 5;
+    }
+}
+export = Foo;