Vendor dependencies for 0.3.0 release

vendor/x11-dl/src/error.rs

@@ -0,0 +1,69 @@
+// x11-rs: Rust bindings for X11 libraries
+// The X11 libraries are available under the MIT license.
+// These bindings are public domain.
+
+use std::error::Error;
+use std::fmt::{Display, Formatter};
+
+//
+// OpenError
+
+//
+
+#[derive(Clone, Debug)]
+pub struct OpenError {
+    kind: OpenErrorKind,
+    detail: String,
+}
+
+impl OpenError {
+    pub fn detail(&self) -> &str {
+        self.detail.as_ref()
+    }
+
+    pub fn kind(&self) -> OpenErrorKind {
+        self.kind
+    }
+
+    pub fn new(kind: OpenErrorKind, detail: String) -> OpenError {
+        OpenError { kind, detail }
+    }
+}
+
+impl Display for OpenError {
+    fn fmt(&self, f: &mut Formatter) -> Result<(), ::std::fmt::Error> {
+        //try!(f.write_str(self.kind.as_str())); TEST Erle July 2020 (on dev branch)
+        f.write_str(self.kind.as_str())?;
+        if !self.detail.is_empty() {
+            f.write_str(" (")?;
+            f.write_str(self.detail.as_ref())?;
+            f.write_str(")")?;
+        }
+        Ok(())
+    }
+}
+
+impl Error for OpenError {
+    fn description(&self) -> &str {
+        self.kind.as_str()
+    }
+}
+
+//
+// OpenErrorKind
+//
+
+#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
+pub enum OpenErrorKind {
+    Library,
+    Symbol,
+}
+
+impl OpenErrorKind {
+    pub fn as_str(self) -> &'static str {
+        match self {
+            OpenErrorKind::Library => "opening library failed",
+            OpenErrorKind::Symbol => "loading symbol failed",
+        }
+    }
+}