1 files changed, 16 insertions, 0 deletions
diff --git a/bolt.go b/bolt.go
index bb5a2de..f258731 100644
--- a/bolt.go
+++ b/bolt.go
@@ -1,6 +1,7 @@
 package bolt
 
 import (
+	"fmt"
 	"os"
 )
 
@@ -13,3 +14,18 @@ func Open(path string, mode os.FileMode) (*DB, error) {
 	}
 	return db, nil
 }
+
+// _assert will panic with a given formatted message if the given condition is false.
+func _assert(condition bool, msg string, v ...interface{}) {
+	if !condition {
+		panic(fmt.Sprintf("assertion failed: "+msg, v...))
+	}
+}
+
+func warn(v ...interface{}) {
+	fmt.Fprintln(os.Stderr, v...)
+}
+
+func warnf(msg string, v ...interface{}) {
+	fmt.Fprintf(os.Stderr, msg+"\n", v...)
+}