1 files changed, 59 insertions, 0 deletions
diff --git a/src/librustdoc/error.rs b/src/librustdoc/error.rs
new file mode 100644
index 000000000..6ed7eab1a
--- /dev/null
+++ b/src/librustdoc/error.rs
@@ -0,0 +1,59 @@
+use std::error;
+use std::fmt::{self, Formatter};
+use std::path::{Path, PathBuf};
+
+use crate::docfs::PathError;
+
+#[derive(Debug)]
+pub(crate) struct Error {
+    pub(crate) file: PathBuf,
+    pub(crate) error: String,
+}
+
+impl error::Error for Error {}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        let file = self.file.display().to_string();
+        if file.is_empty() {
+            write!(f, "{}", self.error)
+        } else {
+            write!(f, "\"{}\": {}", self.file.display(), self.error)
+        }
+    }
+}
+
+impl PathError for Error {
+    fn new<S, P: AsRef<Path>>(e: S, path: P) -> Error
+    where
+        S: ToString + Sized,
+    {
+        Error { file: path.as_ref().to_path_buf(), error: e.to_string() }
+    }
+}
+
+#[macro_export]
+macro_rules! try_none {
+    ($e:expr, $file:expr) => {{
+        use std::io;
+        match $e {
+            Some(e) => e,
+            None => {
+                return Err(<crate::error::Error as crate::docfs::PathError>::new(
+                    io::Error::new(io::ErrorKind::Other, "not found"),
+                    $file,
+                ));
+            }
+        }
+    }};
+}
+
+#[macro_export]
+macro_rules! try_err {
+    ($e:expr, $file:expr) => {{
+        match $e {
+            Ok(e) => e,
+            Err(e) => return Err(Error::new(e, $file)),
+        }
+    }};
+}