Do not treat use expression followed by ++ as cast expression

Fixes #526

Author: sheetalkamat

TypeScript.YAML-tmLanguage

@@ -1089,7 +1089,7 @@ repository:
       # If '<' is preceeded by 'return', 'throw', 'yield', or 'await', it's most likely a type assertion
       # If '=', '(', ',', ':', or '>' are followed by a '<', it is also likely a type assertion as otherwise it would be a syntax error
       # '<=' and '<<=' are cannot be type assertions, as they are assignment operators.
-      begin: (?:(?<=return|throw|yield|await|default|[=(,:>+*?]))\s*(<)(?!<?\=)
+      begin: (?:(?<=return|throw|yield|await|default|[=(,:>*?]|[^+]\+))\s*(<)(?!<?\=)
       beginCaptures:
         '1': { name: meta.brace.angle.ts }
       end: (\>)\s*

TypeScript.tmLanguage

@@ -3417,7 +3417,7 @@
             <key>name</key>
             <string>cast.expr.ts</string>
             <key>begin</key>
-            <string>(?:(?&lt;=return|throw|yield|await|default|[=(,:&gt;+*?]))\s*(&lt;)(?!&lt;?\=)</string>
+            <string>(?:(?&lt;=return|throw|yield|await|default|[=(,:&gt;*?]|[^+]\+))\s*(&lt;)(?!&lt;?\=)</string>
             <key>beginCaptures</key>
             <dict>
               <key>1</key>

tests/baselines/Issue526.baseline.txt

@@ -0,0 +1,74 @@
+original file
+-----------------------------------
+if (a++ < b) {
+}
+
+export class A extends B {
+}
+-----------------------------------
+
+Grammar: TypeScript.tmLanguage
+-----------------------------------
+>if (a++ < b) {
+ ^^
+ source.ts keyword.control.conditional.ts
+   ^
+   source.ts
+    ^
+    source.ts meta.brace.round.ts
+     ^
+     source.ts variable.other.readwrite.ts
+      ^^
+      source.ts keyword.operator.increment.ts
+        ^
+        source.ts
+         ^
+         source.ts keyword.operator.relational.ts
+          ^
+          source.ts
+           ^
+           source.ts variable.other.readwrite.ts
+            ^
+            source.ts meta.brace.round.ts
+             ^
+             source.ts
+              ^
+              source.ts meta.block.ts punctuation.definition.block.ts
+               ^^
+               source.ts meta.block.ts
+>}
+ ^
+ source.ts meta.block.ts punctuation.definition.block.ts
+  ^^
+  source.ts
+>
+ ^^
+ source.ts
+>export class A extends B {
+ ^^^^^^
+ source.ts meta.class.ts keyword.control.export.ts
+       ^
+       source.ts meta.class.ts
+        ^^^^^
+        source.ts meta.class.ts storage.type.class.ts
+             ^
+             source.ts meta.class.ts
+              ^
+              source.ts meta.class.ts entity.name.type.class.ts
+               ^
+               source.ts meta.class.ts
+                ^^^^^^^
+                source.ts meta.class.ts storage.modifier.ts
+                       ^
+                       source.ts meta.class.ts
+                        ^
+                        source.ts meta.class.ts entity.other.inherited-class.ts
+                         ^
+                         source.ts meta.class.ts
+                          ^
+                          source.ts meta.class.ts punctuation.definition.block.ts
+                           ^^
+                           source.ts meta.class.ts
+>}
+ ^
+ source.ts meta.class.ts punctuation.definition.block.ts

tests/cases/Issue526.ts

@@ -0,0 +1,5 @@
+if (a++ < b) {
+}
+
+export class A extends B {
+}