Add Rem statement support + tests (#83)

Author: DecimalTurn

syntaxes/tests/vba/comments.bas

@@ -0,0 +1,42 @@
+' SYNTAX TEST "source.vba" "test comment variations"
+
+  ' Some comment
+' ^^^^^^^^^^^^^^ comment.line.quote
+
+10 ' Some comment with line number
+' <-- constant.numeric.decimal
+'  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ comment.line.quote
+
+Label1: ' Some comment with label
+'       ^^^^^^^^^^^^^^^^^^^^^^^^^ comment.line.quote
+
+Dim x as Long 'Some comment at the end of a line
+'             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ comment.line.quote
+
+Dim x As Long: 'Test comment with colon
+'              ^^^^^^^^^^^^^^^^^^^^^^^^ comment.line.quote
+
+  Rem Some comment
+' ^^^^^^^^^^^^^^^^ comment.line.rem
+
+10 Rem Some comment with line number
+' <-- constant.numeric.decimal
+'  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ comment.line.rem
+
+Label1: Rem Some comment with label
+'       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ comment.line.rem
+
+Dim x as Long Rem Some comment at the end of a line
+'             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ - comment.line.rem
+
+Dim x As Long: Rem Test comment with colon
+'              ^^^^^^^^^^^^^^^^^^^^^^^^^^^ comment.line.rem
+
+' multi line _
+  comment
+' ^^^^^^^ comment.line.continuation
+
+Rem multi line _
+  comment
+' ^^^^^^^ comment.line.continuation
+  

syntaxes/tests/vba/other.bas

@@ -3,9 +3,6 @@
 Attribute VB_Name = "SyntaxTest"
 ' <--------- keyword.other.vba
 
-  ' Some comment
-' ^^^^^^^^^^^^^^ comment.line.quote
-
 Public Const FOO As Integer = 1
 '      ^^^^^ keyword.other.vba
 '                ^^ keyword.control.vba

syntaxes/vba.tmGrammar.yml

@@ -22,9 +22,18 @@ patterns:
 
 repository:
   comments:
-    name: comment.line.quote
-    begin: "'"
-    end: $
+    begin: "(?=')|(?:^(?:|(\\d*)\\s*|[a-zA-Z][a-zA-Z0-9]{0,254}:\\s*)|:\\s*)(?=(?i:Rem ))"
+    beginCaptures:
+      '1':
+        name: constant.numeric.decimal
+    end: "(?<!\\s_)$\n"
+    patterns:
+    - name: comment.line.quote
+      match: "'.*"
+    - name: comment.line.rem
+      match: Rem .*
+    - name: comment.line.continuation
+      match: "^.*"
 
   keywords:
     patterns: