Improve error recovery after a dot

Author: JsonFreeman

src/compiler/parser.ts

@@ -1807,7 +1807,7 @@ module ts {
             // the code would be implicitly: "name.keyword; identifierNameOrKeyword".
             // In the first case though, ASI will not take effect because there is not a
             // line terminator after the keyword.
-            if (scanner.hasPrecedingLineBreak() && scanner.isReservedWord()) {
+            if (scanner.hasPrecedingLineBreak() && isIdentifierOrKeyword()) {
                 let matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
 
                 if (matchesPattern) {

tests/baselines/reference/errorRecoveryWithDotFollowedByNamespaceKeyword.errors.txt

@@ -0,0 +1,18 @@
+tests/cases/compiler/errorRecoveryWithDotFollowedByNamespaceKeyword.ts(4,15): error TS1003: Identifier expected.
+tests/cases/compiler/errorRecoveryWithDotFollowedByNamespaceKeyword.ts(9,2): error TS1005: '}' expected.
+
+
+==== tests/cases/compiler/errorRecoveryWithDotFollowedByNamespaceKeyword.ts (2 errors) ====
+    namespace A {
+        function foo() {
+            if (true) {
+                B.
+                  
+!!! error TS1003: Identifier expected.
+                
+    
+            namespace B {
+                export function baz() { }
+    }
+     
+!!! error TS1005: '}' expected.

tests/baselines/reference/errorRecoveryWithDotFollowedByNamespaceKeyword.js

@@ -0,0 +1,26 @@
+//// [errorRecoveryWithDotFollowedByNamespaceKeyword.ts]
+namespace A {
+    function foo() {
+        if (true) {
+            B.
+            
+
+        namespace B {
+            export function baz() { }
+}
+
+//// [errorRecoveryWithDotFollowedByNamespaceKeyword.js]
+var A;
+(function (A) {
+    function foo() {
+        if (true) {
+            B.
+            ;
+            var B;
+            (function (B) {
+                function baz() { }
+                B.baz = baz;
+            })(B || (B = {}));
+        }
+    }
+})(A || (A = {}));

tests/cases/compiler/errorRecoveryWithDotFollowedByNamespaceKeyword.ts

@@ -0,0 +1,9 @@
+namespace A {
+    function foo() {
+        if (true) {
+            B.
+            
+
+        namespace B {
+            export function baz() { }
+}

tests/cases/fourslash/completionWithDotFollowedByNamespaceKeyword.ts

@@ -0,0 +1,12 @@
+/// <reference path='fourslash.ts'/>
+
+////namespace A {
+////    function foo() {
+////        if (true) {
+////            B./**/
+////        namespace B {
+////            export function baz() { }
+////}
+
+goTo.marker();
+verify.completionListContains("baz", "function B.baz(): void");