Merge pull request #10333 from jwbay/better-type-as-value-error

Add clearer error message when types are used as values

src/compiler/checker.ts

@@ -877,7 +877,8 @@ namespace ts {
                 if (nameNotFoundMessage) {
                     if (!errorLocation ||
                         !checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
-                        !checkAndReportErrorForExtendingInterface(errorLocation)) {
+                        !checkAndReportErrorForExtendingInterface(errorLocation) &&
+                        !checkAndReportErrorForUsingTypeAsValue(errorLocation, name, meaning)) {
                         error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : declarationNameToString(nameArg));
                     }
                 }
@@ -987,6 +988,16 @@ namespace ts {
             }
         }
 
+        function checkAndReportErrorForUsingTypeAsValue(errorLocation: Node, name: string, meaning: SymbolFlags): boolean {
+            if (meaning & (SymbolFlags.Value & ~SymbolFlags.NamespaceModule)) {
+                const symbol = resolveSymbol(resolveName(errorLocation, name, SymbolFlags.Type & ~SymbolFlags.Value, /*nameNotFoundMessage*/undefined, /*nameArg*/ undefined));
+                if (symbol && !(symbol.flags & SymbolFlags.NamespaceModule)) {
+                    error(errorLocation, Diagnostics._0_only_refers_to_a_type_but_is_being_used_as_a_value_here, name);
+                    return true;
+                }
+            }
+            return false;
+        }
 
         function checkResolvedBlockScopedVariable(result: Symbol, errorLocation: Node): void {
             Debug.assert((result.flags & SymbolFlags.BlockScopedVariable) !== 0);

src/compiler/diagnosticMessages.json

@@ -1947,6 +1947,10 @@
         "category": "Error",
         "code": 2692
     },
+    "'{0}' only refers to a type, but is being used as a value here.": {
+        "category": "Error",
+        "code": 2693
+    },
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",
         "code": 4000

tests/baselines/reference/assignments.errors.txt

@@ -3,7 +3,7 @@ tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(14,1): er
 tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(17,1): error TS2364: Invalid left-hand side of assignment expression.
 tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(18,1): error TS2450: Left-hand side of assignment expression cannot be a constant or a read-only property.
 tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(21,1): error TS2364: Invalid left-hand side of assignment expression.
-tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(31,1): error TS2304: Cannot find name 'I'.
+tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(31,1): error TS2693: 'I' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/conformance/expressions/valuesAndReferences/assignments.ts (6 errors) ====
@@ -49,4 +49,4 @@ tests/cases/conformance/expressions/valuesAndReferences/assignments.ts(31,1): er
     interface I { }
     I = null; // Error
     ~
-!!! error TS2304: Cannot find name 'I'.
+!!! error TS2693: 'I' only refers to a type, but is being used as a value here.

tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt

@@ -1,4 +1,4 @@
-tests/cases/compiler/classExtendsInterfaceInExpression.ts(7,25): error TS2304: Cannot find name 'A'.
+tests/cases/compiler/classExtendsInterfaceInExpression.ts(7,25): error TS2693: 'A' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/compiler/classExtendsInterfaceInExpression.ts (1 errors) ====
@@ -10,5 +10,5 @@ tests/cases/compiler/classExtendsInterfaceInExpression.ts(7,25): error TS2304: C
     
     class C extends factory(A) {}
                             ~
-!!! error TS2304: Cannot find name 'A'.
+!!! error TS2693: 'A' only refers to a type, but is being used as a value here.
     

tests/baselines/reference/errorsOnImportedSymbol.errors.txt

@@ -1,15 +1,15 @@
-tests/cases/compiler/errorsOnImportedSymbol_1.ts(2,13): error TS2304: Cannot find name 'Sammy'.
-tests/cases/compiler/errorsOnImportedSymbol_1.ts(3,9): error TS2304: Cannot find name 'Sammy'.
+tests/cases/compiler/errorsOnImportedSymbol_1.ts(2,13): error TS2693: 'Sammy' only refers to a type, but is being used as a value here.
+tests/cases/compiler/errorsOnImportedSymbol_1.ts(3,9): error TS2693: 'Sammy' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/compiler/errorsOnImportedSymbol_1.ts (2 errors) ====
     import Sammy = require("./errorsOnImportedSymbol_0");
     var x = new Sammy.Sammy();
                 ~~~~~
-!!! error TS2304: Cannot find name 'Sammy'.
+!!! error TS2693: 'Sammy' only refers to a type, but is being used as a value here.
     var y = Sammy.Sammy(); 
             ~~~~~
-!!! error TS2304: Cannot find name 'Sammy'.
+!!! error TS2693: 'Sammy' only refers to a type, but is being used as a value here.
     
     
 ==== tests/cases/compiler/errorsOnImportedSymbol_0.ts (0 errors) ====

tests/baselines/reference/es6ExportEqualsInterop.errors.txt

@@ -1,4 +1,4 @@
-tests/cases/compiler/main.ts(15,1): error TS2304: Cannot find name 'z1'.
+tests/cases/compiler/main.ts(15,1): error TS2693: 'z1' only refers to a type, but is being used as a value here.
 tests/cases/compiler/main.ts(21,4): error TS2339: Property 'a' does not exist on type '() => any'.
 tests/cases/compiler/main.ts(23,4): error TS2339: Property 'a' does not exist on type 'typeof Foo'.
 tests/cases/compiler/main.ts(27,8): error TS1192: Module '"interface"' has no default export.
@@ -49,7 +49,7 @@ tests/cases/compiler/main.ts(106,15): error TS2498: Module '"class-module"' uses
     
     z1.a;
     ~~
-!!! error TS2304: Cannot find name 'z1'.
+!!! error TS2693: 'z1' only refers to a type, but is being used as a value here.
     z2.a;
     z3.a;
     z4.a;

tests/baselines/reference/exportAssignmentOfDeclaredExternalModule.errors.txt

@@ -1,5 +1,5 @@
-tests/cases/compiler/exportAssignmentOfDeclaredExternalModule_1.ts(3,13): error TS2304: Cannot find name 'Sammy'.
-tests/cases/compiler/exportAssignmentOfDeclaredExternalModule_1.ts(4,9): error TS2304: Cannot find name 'Sammy'.
+tests/cases/compiler/exportAssignmentOfDeclaredExternalModule_1.ts(3,13): error TS2693: 'Sammy' only refers to a type, but is being used as a value here.
+tests/cases/compiler/exportAssignmentOfDeclaredExternalModule_1.ts(4,9): error TS2693: 'Sammy' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/compiler/exportAssignmentOfDeclaredExternalModule_1.ts (2 errors) ====
@@ -7,10 +7,10 @@ tests/cases/compiler/exportAssignmentOfDeclaredExternalModule_1.ts(4,9): error T
     import Sammy = require('./exportAssignmentOfDeclaredExternalModule_0');
     var x = new Sammy(); // error to use as constructor as there is not constructor symbol
                 ~~~~~
-!!! error TS2304: Cannot find name 'Sammy'.
+!!! error TS2693: 'Sammy' only refers to a type, but is being used as a value here.
     var y = Sammy(); // error to use interface name as call target
             ~~~~~
-!!! error TS2304: Cannot find name 'Sammy'.
+!!! error TS2693: 'Sammy' only refers to a type, but is being used as a value here.
     var z: Sammy; // no error - z is of type interface Sammy from module 'M'
     var a = new z(); // constructor - no error
     var b = z(); // call signature - no error

tests/baselines/reference/genericConstructInvocationWithNoTypeArg.errors.txt

@@ -1,4 +1,4 @@
-tests/cases/compiler/genericConstructInvocationWithNoTypeArg.ts(4,27): error TS2304: Cannot find name 'Foo'.
+tests/cases/compiler/genericConstructInvocationWithNoTypeArg.ts(4,27): error TS2693: 'Foo' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/compiler/genericConstructInvocationWithNoTypeArg.ts (1 errors) ====
@@ -7,5 +7,5 @@ tests/cases/compiler/genericConstructInvocationWithNoTypeArg.ts(4,27): error TS2
     }
     var f2: Foo<number> = new Foo(3);
                               ~~~
-!!! error TS2304: Cannot find name 'Foo'.
+!!! error TS2693: 'Foo' only refers to a type, but is being used as a value here.
     

tests/baselines/reference/inheritFromGenericTypeParameter.errors.txt

@@ -1,11 +1,11 @@
-tests/cases/compiler/inheritFromGenericTypeParameter.ts(1,20): error TS2304: Cannot find name 'T'.
+tests/cases/compiler/inheritFromGenericTypeParameter.ts(1,20): error TS2693: 'T' only refers to a type, but is being used as a value here.
 tests/cases/compiler/inheritFromGenericTypeParameter.ts(2,24): error TS2312: An interface may only extend a class or another interface.
 
 
 ==== tests/cases/compiler/inheritFromGenericTypeParameter.ts (2 errors) ====
     class C<T> extends T { }
                        ~
-!!! error TS2304: Cannot find name 'T'.
+!!! error TS2693: 'T' only refers to a type, but is being used as a value here.
     interface I<T> extends T { }
                            ~
 !!! error TS2312: An interface may only extend a class or another interface.

tests/baselines/reference/intTypeCheck.errors.txt

@@ -10,7 +10,7 @@ tests/cases/compiler/intTypeCheck.ts(103,5): error TS2322: Type '() => void' is
   Property 'p' is missing in type '() => void'.
 tests/cases/compiler/intTypeCheck.ts(106,5): error TS2322: Type 'boolean' is not assignable to type 'i1'.
 tests/cases/compiler/intTypeCheck.ts(106,20): error TS1109: Expression expected.
-tests/cases/compiler/intTypeCheck.ts(106,21): error TS2304: Cannot find name 'i1'.
+tests/cases/compiler/intTypeCheck.ts(106,21): error TS2693: 'i1' only refers to a type, but is being used as a value here.
 tests/cases/compiler/intTypeCheck.ts(107,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(112,5): error TS2322: Type '{}' is not assignable to type 'i2'.
   Type '{}' provides no match for the signature '(): any'
@@ -21,7 +21,7 @@ tests/cases/compiler/intTypeCheck.ts(115,5): error TS2322: Type 'Base' is not as
   Type 'Base' provides no match for the signature '(): any'
 tests/cases/compiler/intTypeCheck.ts(120,5): error TS2322: Type 'boolean' is not assignable to type 'i2'.
 tests/cases/compiler/intTypeCheck.ts(120,21): error TS1109: Expression expected.
-tests/cases/compiler/intTypeCheck.ts(120,22): error TS2304: Cannot find name 'i2'.
+tests/cases/compiler/intTypeCheck.ts(120,22): error TS2693: 'i2' only refers to a type, but is being used as a value here.
 tests/cases/compiler/intTypeCheck.ts(121,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(126,5): error TS2322: Type '{}' is not assignable to type 'i3'.
   Type '{}' provides no match for the signature 'new (): any'
@@ -33,12 +33,12 @@ tests/cases/compiler/intTypeCheck.ts(131,5): error TS2322: Type '() => void' is
   Type '() => void' provides no match for the signature 'new (): any'
 tests/cases/compiler/intTypeCheck.ts(134,5): error TS2322: Type 'boolean' is not assignable to type 'i3'.
 tests/cases/compiler/intTypeCheck.ts(134,21): error TS1109: Expression expected.
-tests/cases/compiler/intTypeCheck.ts(134,22): error TS2304: Cannot find name 'i3'.
+tests/cases/compiler/intTypeCheck.ts(134,22): error TS2693: 'i3' only refers to a type, but is being used as a value here.
 tests/cases/compiler/intTypeCheck.ts(135,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(142,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(148,5): error TS2322: Type 'boolean' is not assignable to type 'i4'.
 tests/cases/compiler/intTypeCheck.ts(148,21): error TS1109: Expression expected.
-tests/cases/compiler/intTypeCheck.ts(148,22): error TS2304: Cannot find name 'i4'.
+tests/cases/compiler/intTypeCheck.ts(148,22): error TS2693: 'i4' only refers to a type, but is being used as a value here.
 tests/cases/compiler/intTypeCheck.ts(149,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(154,5): error TS2322: Type '{}' is not assignable to type 'i5'.
   Property 'p' is missing in type '{}'.
@@ -51,7 +51,7 @@ tests/cases/compiler/intTypeCheck.ts(159,5): error TS2322: Type '() => void' is
   Property 'p' is missing in type '() => void'.
 tests/cases/compiler/intTypeCheck.ts(162,5): error TS2322: Type 'boolean' is not assignable to type 'i5'.
 tests/cases/compiler/intTypeCheck.ts(162,21): error TS1109: Expression expected.
-tests/cases/compiler/intTypeCheck.ts(162,22): error TS2304: Cannot find name 'i5'.
+tests/cases/compiler/intTypeCheck.ts(162,22): error TS2693: 'i5' only refers to a type, but is being used as a value here.
 tests/cases/compiler/intTypeCheck.ts(163,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(168,5): error TS2322: Type '{}' is not assignable to type 'i6'.
   Type '{}' provides no match for the signature '(): any'
@@ -64,7 +64,7 @@ tests/cases/compiler/intTypeCheck.ts(173,5): error TS2322: Type '() => void' is
   Type 'void' is not assignable to type 'number'.
 tests/cases/compiler/intTypeCheck.ts(176,5): error TS2322: Type 'boolean' is not assignable to type 'i6'.
 tests/cases/compiler/intTypeCheck.ts(176,21): error TS1109: Expression expected.
-tests/cases/compiler/intTypeCheck.ts(176,22): error TS2304: Cannot find name 'i6'.
+tests/cases/compiler/intTypeCheck.ts(176,22): error TS2693: 'i6' only refers to a type, but is being used as a value here.
 tests/cases/compiler/intTypeCheck.ts(177,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(182,5): error TS2322: Type '{}' is not assignable to type 'i7'.
   Type '{}' provides no match for the signature 'new (): any'
@@ -76,12 +76,12 @@ tests/cases/compiler/intTypeCheck.ts(187,5): error TS2322: Type '() => void' is
   Type '() => void' provides no match for the signature 'new (): any'
 tests/cases/compiler/intTypeCheck.ts(190,5): error TS2322: Type 'boolean' is not assignable to type 'i7'.
 tests/cases/compiler/intTypeCheck.ts(190,21): error TS1109: Expression expected.
-tests/cases/compiler/intTypeCheck.ts(190,22): error TS2304: Cannot find name 'i7'.
+tests/cases/compiler/intTypeCheck.ts(190,22): error TS2693: 'i7' only refers to a type, but is being used as a value here.
 tests/cases/compiler/intTypeCheck.ts(191,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(198,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/intTypeCheck.ts(204,5): error TS2322: Type 'boolean' is not assignable to type 'i8'.
 tests/cases/compiler/intTypeCheck.ts(204,21): error TS1109: Expression expected.
-tests/cases/compiler/intTypeCheck.ts(204,22): error TS2304: Cannot find name 'i8'.
+tests/cases/compiler/intTypeCheck.ts(204,22): error TS2693: 'i8' only refers to a type, but is being used as a value here.
 tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 
 
@@ -214,7 +214,7 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
                        ~
 !!! error TS1109: Expression expected.
                         ~~
-!!! error TS2304: Cannot find name 'i1'.
+!!! error TS2693: 'i1' only refers to a type, but is being used as a value here.
     var obj10: i1 = new {};
                     ~~~~~~
 !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -247,7 +247,7 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
                         ~
 !!! error TS1109: Expression expected.
                          ~~
-!!! error TS2304: Cannot find name 'i2'.
+!!! error TS2693: 'i2' only refers to a type, but is being used as a value here.
     var obj21: i2 = new {};
                     ~~~~~~
 !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -281,7 +281,7 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
                         ~
 !!! error TS1109: Expression expected.
                          ~~
-!!! error TS2304: Cannot find name 'i3'.
+!!! error TS2693: 'i3' only refers to a type, but is being used as a value here.
     var obj32: i3 = new {};
                     ~~~~~~
 !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -305,7 +305,7 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
                         ~
 !!! error TS1109: Expression expected.
                          ~~
-!!! error TS2304: Cannot find name 'i4'.
+!!! error TS2693: 'i4' only refers to a type, but is being used as a value here.
     var obj43: i4 = new {};
                     ~~~~~~
 !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -341,7 +341,7 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
                         ~
 !!! error TS1109: Expression expected.
                          ~~
-!!! error TS2304: Cannot find name 'i5'.
+!!! error TS2693: 'i5' only refers to a type, but is being used as a value here.
     var obj54: i5 = new {};
                     ~~~~~~
 !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -377,7 +377,7 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
                         ~
 !!! error TS1109: Expression expected.
                          ~~
-!!! error TS2304: Cannot find name 'i6'.
+!!! error TS2693: 'i6' only refers to a type, but is being used as a value here.
     var obj65: i6 = new {};
                     ~~~~~~
 !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -411,7 +411,7 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
                         ~
 !!! error TS1109: Expression expected.
                          ~~
-!!! error TS2304: Cannot find name 'i7'.
+!!! error TS2693: 'i7' only refers to a type, but is being used as a value here.
     var obj76: i7 = new {};
                     ~~~~~~
 !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
@@ -435,7 +435,7 @@ tests/cases/compiler/intTypeCheck.ts(205,17): error TS2351: Cannot use 'new' wit
                         ~
 !!! error TS1109: Expression expected.
                          ~~
-!!! error TS2304: Cannot find name 'i8'.
+!!! error TS2693: 'i8' only refers to a type, but is being used as a value here.
     var obj87: i8 = new {};
                     ~~~~~~
 !!! error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.

tests/baselines/reference/interfaceNameAsIdentifier.errors.txt

@@ -1,4 +1,4 @@
-tests/cases/compiler/interfaceNameAsIdentifier.ts(4,1): error TS2304: Cannot find name 'C'.
+tests/cases/compiler/interfaceNameAsIdentifier.ts(4,1): error TS2693: 'C' only refers to a type, but is being used as a value here.
 tests/cases/compiler/interfaceNameAsIdentifier.ts(12,1): error TS2304: Cannot find name 'm2'.
 
 
@@ -8,7 +8,7 @@ tests/cases/compiler/interfaceNameAsIdentifier.ts(12,1): error TS2304: Cannot fi
     }
     C();
     ~
-!!! error TS2304: Cannot find name 'C'.
+!!! error TS2693: 'C' only refers to a type, but is being used as a value here.
     
     module m2 {
         export interface C {

tests/baselines/reference/interfaceNaming1.errors.txt

@@ -1,19 +1,19 @@
-tests/cases/compiler/interfaceNaming1.ts(1,1): error TS2304: Cannot find name 'interface'.
+tests/cases/compiler/interfaceNaming1.ts(1,1): error TS2693: 'interface' only refers to a type, but is being used as a value here.
 tests/cases/compiler/interfaceNaming1.ts(1,11): error TS1005: ';' expected.
-tests/cases/compiler/interfaceNaming1.ts(3,1): error TS2304: Cannot find name 'interface'.
+tests/cases/compiler/interfaceNaming1.ts(3,1): error TS2693: 'interface' only refers to a type, but is being used as a value here.
 tests/cases/compiler/interfaceNaming1.ts(3,13): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 
 
 ==== tests/cases/compiler/interfaceNaming1.ts (4 errors) ====
     interface { }
     ~~~~~~~~~
-!!! error TS2304: Cannot find name 'interface'.
+!!! error TS2693: 'interface' only refers to a type, but is being used as a value here.
               ~
 !!! error TS1005: ';' expected.
     interface interface{ }
     interface & { }
     ~~~~~~~~~
-!!! error TS2304: Cannot find name 'interface'.
+!!! error TS2693: 'interface' only refers to a type, but is being used as a value here.
                 ~~~
 !!! error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
     

tests/baselines/reference/invalidImportAliasIdentifiers.errors.txt

@@ -1,6 +1,6 @@
 tests/cases/conformance/internalModules/importDeclarations/invalidImportAliasIdentifiers.ts(5,12): error TS2503: Cannot find namespace 'V'.
 tests/cases/conformance/internalModules/importDeclarations/invalidImportAliasIdentifiers.ts(11,12): error TS2503: Cannot find namespace 'C'.
-tests/cases/conformance/internalModules/importDeclarations/invalidImportAliasIdentifiers.ts(23,12): error TS2503: Cannot find namespace 'I'.
+tests/cases/conformance/internalModules/importDeclarations/invalidImportAliasIdentifiers.ts(23,12): error TS2693: 'I' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/conformance/internalModules/importDeclarations/invalidImportAliasIdentifiers.ts (3 errors) ====
@@ -32,5 +32,5 @@ tests/cases/conformance/internalModules/importDeclarations/invalidImportAliasIde
     
     import i = I;
                ~
-!!! error TS2503: Cannot find namespace 'I'.
+!!! error TS2693: 'I' only refers to a type, but is being used as a value here.
     

tests/baselines/reference/invalidUndefinedAssignments.errors.txt

@@ -1,7 +1,7 @@
 tests/cases/conformance/types/primitives/undefined/invalidUndefinedAssignments.ts(4,1): error TS2364: Invalid left-hand side of assignment expression.
 tests/cases/conformance/types/primitives/undefined/invalidUndefinedAssignments.ts(5,1): error TS2450: Left-hand side of assignment expression cannot be a constant or a read-only property.
 tests/cases/conformance/types/primitives/undefined/invalidUndefinedAssignments.ts(9,1): error TS2364: Invalid left-hand side of assignment expression.
-tests/cases/conformance/types/primitives/undefined/invalidUndefinedAssignments.ts(14,1): error TS2304: Cannot find name 'I'.
+tests/cases/conformance/types/primitives/undefined/invalidUndefinedAssignments.ts(14,1): error TS2693: 'I' only refers to a type, but is being used as a value here.
 tests/cases/conformance/types/primitives/undefined/invalidUndefinedAssignments.ts(17,1): error TS2364: Invalid left-hand side of assignment expression.
 tests/cases/conformance/types/primitives/undefined/invalidUndefinedAssignments.ts(21,1): error TS2364: Invalid left-hand side of assignment expression.
 
@@ -28,7 +28,7 @@ tests/cases/conformance/types/primitives/undefined/invalidUndefinedAssignments.t
     g = x;
     I = x;
     ~
-!!! error TS2304: Cannot find name 'I'.
+!!! error TS2693: 'I' only refers to a type, but is being used as a value here.
     
     module M { export var x = 1; }
     M = x;

tests/baselines/reference/modularizeLibrary_ErrorFromUsingES6ArrayWithOnlyES6ArrayLib.errors.txt

@@ -1,7 +1,7 @@
 error TS2318: Cannot find global type 'Boolean'.
 error TS2318: Cannot find global type 'IArguments'.
 error TS2318: Cannot find global type 'Number'.
-tests/cases/compiler/modularizeLibrary_ErrorFromUsingES6ArrayWithOnlyES6ArrayLib.ts(4,12): error TS2304: Cannot find name 'Array'.
+tests/cases/compiler/modularizeLibrary_ErrorFromUsingES6ArrayWithOnlyES6ArrayLib.ts(4,12): error TS2693: 'Array' only refers to a type, but is being used as a value here.
 
 
 !!! error TS2318: Cannot find global type 'Boolean'.
@@ -13,7 +13,7 @@ tests/cases/compiler/modularizeLibrary_ErrorFromUsingES6ArrayWithOnlyES6ArrayLib
     function f(x: number, y: number, z: number) {
         return Array.from(arguments);
                ~~~~~
-!!! error TS2304: Cannot find name 'Array'.
+!!! error TS2693: 'Array' only refers to a type, but is being used as a value here.
     }
     
     f(1, 2, 3);

tests/baselines/reference/newOperator.errors.txt

@@ -1,4 +1,4 @@
-tests/cases/compiler/newOperator.ts(3,13): error TS2304: Cannot find name 'ifc'.
+tests/cases/compiler/newOperator.ts(3,13): error TS2693: 'ifc' only refers to a type, but is being used as a value here.
 tests/cases/compiler/newOperator.ts(10,10): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/newOperator.ts(11,10): error TS2351: Cannot use 'new' with an expression whose type lacks a call or construct signature.
 tests/cases/compiler/newOperator.ts(12,5): error TS2304: Cannot find name 'string'.
@@ -17,7 +17,7 @@ tests/cases/compiler/newOperator.ts(45,23): error TS1150: 'new T[]' cannot be us
     // Attempting to 'new' an interface yields poor error
     var i = new ifc();
                 ~~~
-!!! error TS2304: Cannot find name 'ifc'.
+!!! error TS2693: 'ifc' only refers to a type, but is being used as a value here.
     
     // Parens are optional
     var x = new Date;

tests/baselines/reference/reservedNamesInAliases.errors.txt

@@ -5,7 +5,7 @@ tests/cases/conformance/types/typeAliases/reservedNamesInAliases.ts(5,6): error
 tests/cases/conformance/types/typeAliases/reservedNamesInAliases.ts(6,1): error TS2304: Cannot find name 'type'.
 tests/cases/conformance/types/typeAliases/reservedNamesInAliases.ts(6,6): error TS1005: ';' expected.
 tests/cases/conformance/types/typeAliases/reservedNamesInAliases.ts(6,11): error TS1109: Expression expected.
-tests/cases/conformance/types/typeAliases/reservedNamesInAliases.ts(6,13): error TS2304: Cannot find name 'I'.
+tests/cases/conformance/types/typeAliases/reservedNamesInAliases.ts(6,13): error TS2693: 'I' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/conformance/types/typeAliases/reservedNamesInAliases.ts (8 errors) ====
@@ -30,4 +30,4 @@ tests/cases/conformance/types/typeAliases/reservedNamesInAliases.ts(6,13): error
               ~
 !!! error TS1109: Expression expected.
                 ~
-!!! error TS2304: Cannot find name 'I'.
+!!! error TS2693: 'I' only refers to a type, but is being used as a value here.

tests/baselines/reference/returnTypeParameter.errors.txt

@@ -1,5 +1,5 @@
 tests/cases/compiler/returnTypeParameter.ts(1,22): error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
-tests/cases/compiler/returnTypeParameter.ts(2,34): error TS2304: Cannot find name 'T'.
+tests/cases/compiler/returnTypeParameter.ts(2,34): error TS2693: 'T' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/compiler/returnTypeParameter.ts (2 errors) ====
@@ -8,4 +8,4 @@ tests/cases/compiler/returnTypeParameter.ts(2,34): error TS2304: Cannot find nam
 !!! error TS2355: A function whose declared type is neither 'void' nor 'any' must return a value.
     function f2<T>(a: T): T { return T; } // bug was that this satisfied the return statement requirement
                                      ~
-!!! error TS2304: Cannot find name 'T'.
+!!! error TS2693: 'T' only refers to a type, but is being used as a value here.

tests/baselines/reference/strictModeReservedWordInClassDeclaration.errors.txt

@@ -16,9 +16,9 @@ tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(21,9): error TS
 tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(21,17): error TS1213: Identifier expected. 'private' is a reserved word in strict mode. Class definitions are automatically in strict mode.
 tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(23,20): error TS1213: Identifier expected. 'public' is a reserved word in strict mode. Class definitions are automatically in strict mode.
 tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(25,20): error TS1213: Identifier expected. 'public' is a reserved word in strict mode. Class definitions are automatically in strict mode.
-tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(25,20): error TS2503: Cannot find namespace 'public'.
+tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(25,20): error TS2693: 'public' only refers to a type, but is being used as a value here.
 tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(26,21): error TS1213: Identifier expected. 'public' is a reserved word in strict mode. Class definitions are automatically in strict mode.
-tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(26,21): error TS2503: Cannot find namespace 'public'.
+tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(26,21): error TS2693: 'public' only refers to a type, but is being used as a value here.
 tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(27,17): error TS1213: Identifier expected. 'package' is a reserved word in strict mode. Class definitions are automatically in strict mode.
 tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(27,17): error TS2304: Cannot find name 'package'.
 tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(28,17): error TS1213: Identifier expected. 'package' is a reserved word in strict mode. Class definitions are automatically in strict mode.
@@ -88,12 +88,12 @@ tests/cases/compiler/strictModeReservedWordInClassDeclaration.ts(28,17): error T
                        ~~~~~~
 !!! error TS1213: Identifier expected. 'public' is a reserved word in strict mode. Class definitions are automatically in strict mode.
                        ~~~~~~
-!!! error TS2503: Cannot find namespace 'public'.
+!!! error TS2693: 'public' only refers to a type, but is being used as a value here.
     class F1 implements public.private.implements { }
                         ~~~~~~
 !!! error TS1213: Identifier expected. 'public' is a reserved word in strict mode. Class definitions are automatically in strict mode.
                         ~~~~~~
-!!! error TS2503: Cannot find namespace 'public'.
+!!! error TS2693: 'public' only refers to a type, but is being used as a value here.
     class G extends package { }
                     ~~~~~~~
 !!! error TS1213: Identifier expected. 'package' is a reserved word in strict mode. Class definitions are automatically in strict mode.

tests/baselines/reference/typeParameterAsBaseClass.errors.txt

@@ -1,11 +1,11 @@
-tests/cases/compiler/typeParameterAsBaseClass.ts(1,20): error TS2304: Cannot find name 'T'.
+tests/cases/compiler/typeParameterAsBaseClass.ts(1,20): error TS2693: 'T' only refers to a type, but is being used as a value here.
 tests/cases/compiler/typeParameterAsBaseClass.ts(2,24): error TS2422: A class may only implement another class or interface.
 
 
 ==== tests/cases/compiler/typeParameterAsBaseClass.ts (2 errors) ====
     class C<T> extends T {}
                        ~
-!!! error TS2304: Cannot find name 'T'.
+!!! error TS2693: 'T' only refers to a type, but is being used as a value here.
     class C2<T> implements T {}
                            ~
 !!! error TS2422: A class may only implement another class or interface.

tests/baselines/reference/typeParameterAsBaseType.errors.txt

@@ -1,5 +1,5 @@
-tests/cases/conformance/types/typeParameters/typeParameterAsBaseType.ts(4,20): error TS2304: Cannot find name 'T'.
-tests/cases/conformance/types/typeParameters/typeParameterAsBaseType.ts(5,24): error TS2304: Cannot find name 'U'.
+tests/cases/conformance/types/typeParameters/typeParameterAsBaseType.ts(4,20): error TS2693: 'T' only refers to a type, but is being used as a value here.
+tests/cases/conformance/types/typeParameters/typeParameterAsBaseType.ts(5,24): error TS2693: 'U' only refers to a type, but is being used as a value here.
 tests/cases/conformance/types/typeParameters/typeParameterAsBaseType.ts(7,24): error TS2312: An interface may only extend a class or another interface.
 tests/cases/conformance/types/typeParameters/typeParameterAsBaseType.ts(8,28): error TS2312: An interface may only extend a class or another interface.
 
@@ -10,10 +10,10 @@ tests/cases/conformance/types/typeParameters/typeParameterAsBaseType.ts(8,28): e
     
     class C<T> extends T { }
                        ~
-!!! error TS2304: Cannot find name 'T'.
+!!! error TS2693: 'T' only refers to a type, but is being used as a value here.
     class C2<T, U> extends U { }
                            ~
-!!! error TS2304: Cannot find name 'U'.
+!!! error TS2693: 'U' only refers to a type, but is being used as a value here.
     
     interface I<T> extends T { }
                            ~

tests/baselines/reference/typeUsedAsValueError.errors.txt

@@ -0,0 +1,50 @@
+tests/cases/compiler/typeUsedAsValueError.ts(16,11): error TS2693: 'Interface' only refers to a type, but is being used as a value here.
+tests/cases/compiler/typeUsedAsValueError.ts(17,11): error TS2304: Cannot find name 'InterfaceNotFound'.
+tests/cases/compiler/typeUsedAsValueError.ts(18,13): error TS2693: 'TypeAliasForSomeClass' only refers to a type, but is being used as a value here.
+tests/cases/compiler/typeUsedAsValueError.ts(19,16): error TS2693: 'TypeAliasForSomeClass' only refers to a type, but is being used as a value here.
+tests/cases/compiler/typeUsedAsValueError.ts(20,16): error TS2304: Cannot find name 'TypeAliasForSomeClassNotFound'.
+tests/cases/compiler/typeUsedAsValueError.ts(21,11): error TS2693: 'someType' only refers to a type, but is being used as a value here.
+tests/cases/compiler/typeUsedAsValueError.ts(22,17): error TS2693: 'someType' only refers to a type, but is being used as a value here.
+tests/cases/compiler/typeUsedAsValueError.ts(23,17): error TS2304: Cannot find name 'someTypeNotFound'.
+
+
+==== tests/cases/compiler/typeUsedAsValueError.ts (8 errors) ====
+    interface Interface {
+    
+    }
+    
+    class SomeClass {
+    
+    }
+    
+    type TypeAliasForSomeClass = SomeClass;
+    type someType = { x: number };
+    
+    function acceptsSomeType(a: someType) {
+    
+    }
+    
+    let one = Interface;
+              ~~~~~~~~~
+!!! error TS2693: 'Interface' only refers to a type, but is being used as a value here.
+    let two = InterfaceNotFound;
+              ~~~~~~~~~~~~~~~~~
+!!! error TS2304: Cannot find name 'InterfaceNotFound'.
+    let three = TypeAliasForSomeClass;
+                ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2693: 'TypeAliasForSomeClass' only refers to a type, but is being used as a value here.
+    let four = new TypeAliasForSomeClass();
+                   ~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2693: 'TypeAliasForSomeClass' only refers to a type, but is being used as a value here.
+    let five = new TypeAliasForSomeClassNotFound();
+                   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2304: Cannot find name 'TypeAliasForSomeClassNotFound'.
+    let six = someType;
+              ~~~~~~~~
+!!! error TS2693: 'someType' only refers to a type, but is being used as a value here.
+    acceptsSomeType(someType);
+                    ~~~~~~~~
+!!! error TS2693: 'someType' only refers to a type, but is being used as a value here.
+    acceptsSomeType(someTypeNotFound);
+                    ~~~~~~~~~~~~~~~~
+!!! error TS2304: Cannot find name 'someTypeNotFound'.

tests/baselines/reference/typeUsedAsValueError.js

@@ -0,0 +1,41 @@
+//// [typeUsedAsValueError.ts]
+interface Interface {
+
+}
+
+class SomeClass {
+
+}
+
+type TypeAliasForSomeClass = SomeClass;
+type someType = { x: number };
+
+function acceptsSomeType(a: someType) {
+
+}
+
+let one = Interface;
+let two = InterfaceNotFound;
+let three = TypeAliasForSomeClass;
+let four = new TypeAliasForSomeClass();
+let five = new TypeAliasForSomeClassNotFound();
+let six = someType;
+acceptsSomeType(someType);
+acceptsSomeType(someTypeNotFound);
+
+//// [typeUsedAsValueError.js]
+var SomeClass = (function () {
+    function SomeClass() {
+    }
+    return SomeClass;
+}());
+function acceptsSomeType(a) {
+}
+var one = Interface;
+var two = InterfaceNotFound;
+var three = TypeAliasForSomeClass;
+var four = new TypeAliasForSomeClass();
+var five = new TypeAliasForSomeClassNotFound();
+var six = someType;
+acceptsSomeType(someType);
+acceptsSomeType(someTypeNotFound);

tests/baselines/reference/typeUsedAsValueError2.errors.txt

@@ -0,0 +1,28 @@
+tests/cases/compiler/world.ts(4,1): error TS2693: 'HelloInterface' only refers to a type, but is being used as a value here.
+tests/cases/compiler/world.ts(5,1): error TS2304: Cannot find name 'HelloNamespace'.
+
+
+==== tests/cases/compiler/world.ts (2 errors) ====
+    import HelloInterface = require("helloInterface");
+    import HelloNamespace = require("helloNamespace");
+    
+    HelloInterface.world;
+    ~~~~~~~~~~~~~~
+!!! error TS2693: 'HelloInterface' only refers to a type, but is being used as a value here.
+    HelloNamespace.world;
+    ~~~~~~~~~~~~~~
+!!! error TS2304: Cannot find name 'HelloNamespace'.
+==== tests/cases/compiler/helloInterface.ts (0 errors) ====
+    interface HelloInterface {
+        world: any;
+    }
+    
+    export = HelloInterface;
+    
+==== tests/cases/compiler/helloNamespace.ts (0 errors) ====
+    namespace HelloNamespace {
+        export type world = any;
+    }
+    
+    export = HelloNamespace;
+    

tests/baselines/reference/typeUsedAsValueError2.js

@@ -0,0 +1,37 @@
+//// [tests/cases/compiler/typeUsedAsValueError2.ts] ////
+
+//// [helloInterface.ts]
+interface HelloInterface {
+    world: any;
+}
+
+export = HelloInterface;
+
+//// [helloNamespace.ts]
+namespace HelloNamespace {
+    export type world = any;
+}
+
+export = HelloNamespace;
+
+//// [world.ts]
+import HelloInterface = require("helloInterface");
+import HelloNamespace = require("helloNamespace");
+
+HelloInterface.world;
+HelloNamespace.world;
+
+//// [helloInterface.js]
+define(["require", "exports"], function (require, exports) {
+    "use strict";
+});
+//// [helloNamespace.js]
+define(["require", "exports"], function (require, exports) {
+    "use strict";
+});
+//// [world.js]
+define(["require", "exports"], function (require, exports) {
+    "use strict";
+    HelloInterface.world;
+    HelloNamespace.world;
+});

tests/baselines/reference/typeofSimple.errors.txt

@@ -1,5 +1,5 @@
 tests/cases/compiler/typeofSimple.ts(3,5): error TS2322: Type 'number' is not assignable to type 'string'.
-tests/cases/compiler/typeofSimple.ts(8,21): error TS2304: Cannot find name 'J'.
+tests/cases/compiler/typeofSimple.ts(8,21): error TS2693: 'J' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/compiler/typeofSimple.ts (2 errors) ====
@@ -14,7 +14,7 @@ tests/cases/compiler/typeofSimple.ts(8,21): error TS2304: Cannot find name 'J'.
     
     var numberJ: typeof J; //Error, cannot reference type in typeof
                         ~
-!!! error TS2304: Cannot find name 'J'.
+!!! error TS2693: 'J' only refers to a type, but is being used as a value here.
     var numberI: I<typeof v2>;
     
     var fun: () => I<number>;

tests/baselines/reference/typeofTypeParameter.errors.txt

@@ -1,4 +1,4 @@
-tests/cases/conformance/types/specifyingTypes/typeQueries/typeofTypeParameter.ts(3,19): error TS2304: Cannot find name 'T'.
+tests/cases/conformance/types/specifyingTypes/typeQueries/typeofTypeParameter.ts(3,19): error TS2693: 'T' only refers to a type, but is being used as a value here.
 
 
 ==== tests/cases/conformance/types/specifyingTypes/typeQueries/typeofTypeParameter.ts (1 errors) ====
@@ -6,6 +6,6 @@ tests/cases/conformance/types/specifyingTypes/typeQueries/typeofTypeParameter.ts
         var a: typeof x;
         var y: typeof T;
                       ~
-!!! error TS2304: Cannot find name 'T'.
+!!! error TS2693: 'T' only refers to a type, but is being used as a value here.
         return a;
     }

tests/baselines/reference/validNullAssignments.errors.txt

@@ -1,6 +1,6 @@
 tests/cases/conformance/types/primitives/null/validNullAssignments.ts(10,1): error TS2450: Left-hand side of assignment expression cannot be a constant or a read-only property.
 tests/cases/conformance/types/primitives/null/validNullAssignments.ts(15,1): error TS2364: Invalid left-hand side of assignment expression.
-tests/cases/conformance/types/primitives/null/validNullAssignments.ts(20,1): error TS2304: Cannot find name 'I'.
+tests/cases/conformance/types/primitives/null/validNullAssignments.ts(20,1): error TS2693: 'I' only refers to a type, but is being used as a value here.
 tests/cases/conformance/types/primitives/null/validNullAssignments.ts(23,1): error TS2364: Invalid left-hand side of assignment expression.
 tests/cases/conformance/types/primitives/null/validNullAssignments.ts(30,1): error TS2364: Invalid left-hand side of assignment expression.
 
@@ -31,7 +31,7 @@ tests/cases/conformance/types/primitives/null/validNullAssignments.ts(30,1): err
     g = null; // ok
     I = null; // error
     ~
-!!! error TS2304: Cannot find name 'I'.
+!!! error TS2693: 'I' only refers to a type, but is being used as a value here.
     
     module M { export var x = 1; }
     M = null; // error

tests/cases/compiler/typeUsedAsValueError.ts

@@ -0,0 +1,23 @@
+interface Interface {
+
+}
+
+class SomeClass {
+
+}
+
+type TypeAliasForSomeClass = SomeClass;
+type someType = { x: number };
+
+function acceptsSomeType(a: someType) {
+
+}
+
+let one = Interface;
+let two = InterfaceNotFound;
+let three = TypeAliasForSomeClass;
+let four = new TypeAliasForSomeClass();
+let five = new TypeAliasForSomeClassNotFound();
+let six = someType;
+acceptsSomeType(someType);
+acceptsSomeType(someTypeNotFound);

tests/cases/compiler/typeUsedAsValueError2.ts

@@ -0,0 +1,21 @@
+// @module: amd
+// @filename: helloInterface.ts
+interface HelloInterface {
+    world: any;
+}
+
+export = HelloInterface;
+
+// @filename: helloNamespace.ts
+namespace HelloNamespace {
+    export type world = any;
+}
+
+export = HelloNamespace;
+
+// @filename: world.ts
+import HelloInterface = require("helloInterface");
+import HelloNamespace = require("helloNamespace");
+
+HelloInterface.world;
+HelloNamespace.world;