Added pygments lexer

exercises/vsl.py

@@ -0,0 +1,20 @@
+from pygments.lexer import RegexLexer
+from pygments.token import Whitespace, Comment, Keyword, Operator, Number, Name, String, Generic
+
+class VSLLexer(RegexLexer):
+    name        = "VSL"
+    aliases     = ["vsl"]
+    filenames   = ["*.vsl"]
+
+    tokens = {
+        "root": [
+            (r"[\ \t\v\r\n]+", Whitespace),
+            (r"\/\/[^\n]+", Comment),
+            (r"func|print|return|continue|if|then|else|while|do|begin|end|var", Keyword),
+            (r"\^|\||:|=|\+|-|\*|\/|<|>|&", Operator),
+            (r"[0-9]+", Number.Integer),
+            (r"[A-Za-z_][0-9A-Za-z_]*", Name),
+            (r"\"([^\"\n]|\\\")*\"", String),
+            (r".", Generic),
+        ]
+    }