import operators from Base explicitly

src/seq/seq.jl

@@ -3,9 +3,11 @@ module Seq
 using Compat
 using Base.Intrinsics
 
-import Base: convert, complement, getindex, show, length, start, next, done,
-             copy, reverse, show, endof, isless, clipboard, parse, repeat,
-             unsafe_copy!, read, read!, ==, *, |, &
+import Base: convert, complement, show, length, start, next, done, copy,
+             reverse, show, endof, isless, clipboard, parse, repeat,
+             unsafe_copy!, read, read!,
+             # operators
+             getindex, setindex!, ==, *, ^, |, &
 
 import Bio: FileFormat