Add Range::erase

[folly.git] / folly / Range.h

diff --git a/folly/Range.h b/folly/Range.h
index 2e994732f80f6b9c9aabf5b53cc07cfa515f35fe..6bece6da47007172036085a765837a5b5881ca92 100644 (file)
--- a/folly/Range.h
+++ b/folly/Range.h
@@ -594,6 +594,22 @@ public:
     return !empty() && back() == c;
   }
 
+  /**
+   * Remove the items in [b, e), as long as this subrange is at the beginning
+   * or end of the Range.
+   *
+   * Required for boost::algorithm::trim()
+   */
+  void erase(Iter b, Iter e) {
+    if (b == b_) {
+      b_ = e;
+    } else if (e == e_) {
+      e_ = b;
+    } else {
+      throw std::out_of_range("index out of range");
+    }
+  }
+
   /**
    * Remove the given prefix and return true if the range starts with the given
    * prefix; return false otherwise.