Handle return type of arrow in possibly multiline arrow of the object member

Fixes #751

Author: sheetalkamat

TypeScript.YAML-tmLanguage

@@ -67,7 +67,7 @@ variables:
   typeArgumentsInnerExpressionPart: '[^<>\(]|{{matchingParenthesis}}|(?<==)\>'
   typeArguments: '<\s*{{typeArgumentsStart}}({{typeArgumentsInnerExpressionPart}}|\<\s*{{typeArgumentsStart}}(({{typeArgumentsInnerExpressionPart}}|\<\s*{{typeArgumentsStart}}({{typeArgumentsInnerExpressionPart}})*(?<!=)\>))*(?<!=)\>)*(?<!=)>'
   functionCallLookup: \s*(\?\.\s*)?({{typeArguments}}\s*)?\(
-  returnTypeOfArrow: \s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+
+  returnTypeOfArrow: \s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+
   arrowLookup: |-
     # sure shot arrow functions even if => is on new line
     (
@@ -1411,6 +1411,7 @@ repository:
           '0': { name: meta.brace.round.ts }
         patterns:
         - include: '#expression-inside-possibly-arrow-parens'
+      - include: '#possibly-arrow-return-type'
       - include: '#expression'
     - include: '#punctuation-comma'
 

TypeScript.tmLanguage

@@ -641,7 +641,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -683,7 +683,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -803,7 +803,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -845,7 +845,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -1468,7 +1468,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -1510,7 +1510,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -1930,7 +1930,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -1972,7 +1972,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -2531,7 +2531,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   )
@@ -4363,7 +4363,7 @@
 (
   (<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<]|\<\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=<>]|=[^<])*\>)*\>)*>\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^<>\(\)\{\}]|\<[^<>]+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^<>\(\)\{\}]|\<([^<>]|\<[^<>]+\>)+\>|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=>                                                                                               # arrow operator
 )
   ))
@@ -4591,6 +4591,10 @@
                   </dict>
                 </array>
               </dict>
+              <dict>
+                <key>include</key>
+                <string>#possibly-arrow-return-type</string>
+              </dict>
               <dict>
                 <key>include</key>
                 <string>#expression</string>
@@ -4919,7 +4923,7 @@
 (
   (&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;]|\&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;]|\&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;])*\&gt;)*\&gt;)*&gt;\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^&lt;&gt;\(\)\{\}]|\&lt;[^&lt;&gt;]+\&gt;|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^&lt;&gt;\(\)\{\}]|\&lt;([^&lt;&gt;]|\&lt;[^&lt;&gt;]+\&gt;)+\&gt;|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=&gt;                                                                                               # arrow operator
 )
   ))
@@ -4961,7 +4965,7 @@
 (
   (&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;]|\&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;]|\&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;])*\&gt;)*\&gt;)*&gt;\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^&lt;&gt;\(\)\{\}]|\&lt;[^&lt;&gt;]+\&gt;|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^&lt;&gt;\(\)\{\}]|\&lt;([^&lt;&gt;]|\&lt;[^&lt;&gt;]+\&gt;)+\&gt;|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=&gt;                                                                                               # arrow operator
 )
   ))
@@ -6259,7 +6263,7 @@
 (
   (&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;]|\&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;]|\&lt;\s*([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\(([^\(\)]|(\([^\(\)]*\)))*\))|(\[([^\[\]]|(\[[^\[\]]*\]))*\]))([^=&lt;&gt;]|=[^&lt;])*\&gt;)*\&gt;)*&gt;\s*)?                                                                                 # typeparameters
   \(\s*(\/\*([^\*]|(\*[^\/]))*\*\/\s*)*(([_$[:alpha:]]|(\{([^\{\}]|(\{[^\{\}]*\}))*\})|(\[([^\[\]]|(\[[^\[\]]*\]))*\])|(\.\.\.\s*[_$[:alpha:]]))([^()]|(\(([^\(\)]|(\([^\(\)]*\)))*\)))*)?\)   # parameters
-  (\s*:\s*([^&lt;&gt;\(\)\{\}]|\&lt;[^&lt;&gt;]+\&gt;|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
+  (\s*:\s*([^&lt;&gt;\(\)\{\}]|\&lt;([^&lt;&gt;]|\&lt;[^&lt;&gt;]+\&gt;)+\&gt;|\([^\(\)]+\)|\{[^\{\}]+\})+)?                                                                        # return type
   \s*=&gt;                                                                                               # arrow operator
 )
   ))
@@ -6594,7 +6598,7 @@
       <key>possibly-arrow-return-type</key>
       <dict>
         <key>begin</key>
-        <string>(?&lt;=\)|^)\s*(:)(?=\s*([^&lt;&gt;\(\)\{\}]|\&lt;[^&lt;&gt;]+\&gt;|\([^\(\)]+\)|\{[^\{\}]+\})+\s*=&gt;)</string>
+        <string>(?&lt;=\)|^)\s*(:)(?=\s*([^&lt;&gt;\(\)\{\}]|\&lt;([^&lt;&gt;]|\&lt;[^&lt;&gt;]+\&gt;)+\&gt;|\([^\(\)]+\)|\{[^\{\}]+\})+\s*=&gt;)</string>
         <key>beginCaptures</key>
         <dict>
           <key>1</key>