query: implement add_tag_exclude

1 files changed, 7 insertions, 0 deletions

diff --git a/src/query.rs b/src/query.rs
index 127a9ab..f9afed5 100644
--- a/src/query.rs
+++ b/src/query.rs
@@ -1,5 +1,6 @@
 use std::ops::Drop;
 use std::ptr;
+use std::ffi::{CStr, CString};
 
 use supercow::{Phantomcow, Supercow};
 
@@ -78,6 +79,12 @@ impl<'d> Query<'d> {
 
         Ok(cnt)
     }
+
+    pub fn add_tag_exclude(self: &Self, tag: &str) -> Result<()>
+    {
+        let tag_str = CString::new(tag).unwrap();
+        unsafe { ffi::notmuch_query_add_tag_exclude(self.ptr, tag_str.as_ptr()) }.as_result()
+    }
 }
 
 pub trait QueryExt<'d> {