add logging macros for debug mode only printing

1 files changed, 24 insertions, 0 deletions

diff --git a/src/log.rs b/src/log.rs
new file mode 100644
index 0000000..5be30d3
--- /dev/null
+++ b/src/log.rs
@@ -0,0 +1,24 @@
+//! Helper macros for logging
+
+/// Log to standard error, only compiled when in debug mode.
+#[macro_export]
+macro_rules! debug {
+    ($($e:expr),*) => {
+        #[cfg(debug_assertions)]
+        {
+            eprintln!($($e),*);
+        }
+    };
+}
+
+/// Log a request / cookie when `debug_assertions` are on
+#[macro_export]
+macro_rules! debug_req {
+    ($req:ident) => {
+        crate::debug!("seq ?: {:?}", $req)
+    };
+    ($req:ident, $cookie:ident) => {
+        use xcb::Cookie;
+        crate::debug!("seq {}: {:?}", $cookie.sequence(), $req)
+    };
+}