1 files changed, 15 insertions, 0 deletions
diff --git a/scalatexApi/src/main/scala/scalaparser/syntax/Basic.scala b/scalatexApi/src/main/scala/scalaparser/syntax/Basic.scala
index bd142a1..157b0bb 100644
--- a/scalatexApi/src/main/scala/scalaparser/syntax/Basic.scala
+++ b/scalatexApi/src/main/scala/scalaparser/syntax/Basic.scala
@@ -33,4 +33,19 @@ trait Basic { self: Parser =>
     def Lower = rule { "a" - "z" | "$" | "_" | CharPredicate.from(_.isLower) }
     def Upper = rule { "A" - "Z" | CharPredicate.from(_.isUpper) }
   }
+  /**
+   * Most keywords don't just require the correct characters to match,
+   * they have to ensure that subsequent characters *don't* match in
+   * order for it to be a keyword. This enforces that rule for key-words
+   * (W) and key-operators (O) which have different non-match criteria.
+   */
+  object Key {
+    def W(s: String) = rule {
+      str(s) ~ !(Basic.Letter | Basic.Digit)
+    }
+
+    def O(s: String) = rule {
+      str(s) ~ !Basic.OperatorChar
+    }
+  }
 }