Fix the cast expression detection logic to include few more expression locations that would be operator location

Fixes #450

TypeScript.YAML-tmLanguage

@@ -1485,7 +1485,7 @@ 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: \>

TypeScript.tmLanguage

@@ -4058,7 +4058,7 @@
             <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/Issue450.baseline.txt

@@ -0,0 +1,58 @@
+original file
+-----------------------------------
+// @onlyOwnGrammar - As this has type assertion
+let a = true ? <number>1 : <number>2;
+-----------------------------------
+
+Grammar: TypeScript.tmLanguage
+-----------------------------------
+>// @onlyOwnGrammar - As this has type assertion
+ ^^
+ source.ts comment.line.double-slash.ts punctuation.definition.comment.ts
+   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+   source.ts comment.line.double-slash.ts
+>let a = true ? <number>1 : <number>2;
+ ^^^
+ source.ts meta.var.expr.ts storage.type.ts
+    ^
+    source.ts meta.var.expr.ts
+     ^
+     source.ts meta.var.expr.ts meta.var-single-variable.expr.ts meta.definition.variable.ts variable.other.readwrite.ts
+      ^
+      source.ts meta.var.expr.ts meta.var-single-variable.expr.ts
+       ^
+       source.ts meta.var.expr.ts keyword.operator.assignment.ts
+        ^
+        source.ts meta.var.expr.ts
+         ^^^^
+         source.ts meta.var.expr.ts constant.language.boolean.true.ts
+             ^
+             source.ts meta.var.expr.ts
+              ^
+              source.ts meta.var.expr.ts keyword.operator.ternary.ts
+               ^
+               source.ts meta.var.expr.ts cast.expr.ts
+                ^
+                source.ts meta.var.expr.ts cast.expr.ts meta.brace.angle.ts
+                 ^^^^^^
+                 source.ts meta.var.expr.ts cast.expr.ts support.type.primitive.ts
+                       ^
+                       source.ts meta.var.expr.ts cast.expr.ts meta.brace.angle.ts
+                        ^
+                        source.ts meta.var.expr.ts constant.numeric.decimal.ts
+                         ^
+                         source.ts meta.var.expr.ts
+                          ^
+                          source.ts meta.var.expr.ts keyword.operator.ternary.ts
+                           ^
+                           source.ts meta.var.expr.ts cast.expr.ts
+                            ^
+                            source.ts meta.var.expr.ts cast.expr.ts meta.brace.angle.ts
+                             ^^^^^^
+                             source.ts meta.var.expr.ts cast.expr.ts support.type.primitive.ts
+                                   ^
+                                   source.ts meta.var.expr.ts cast.expr.ts meta.brace.angle.ts
+                                    ^
+                                    source.ts meta.var.expr.ts constant.numeric.decimal.ts
+                                     ^
+                                     source.ts punctuation.terminator.statement.ts

tests/cases/Issue450.ts

@@ -0,0 +1,2 @@
+// @onlyOwnGrammar - As this has type assertion
+let a = true ? <number>1 : <number>2;