introduce hir::Name

1 files changed, 56 insertions, 0 deletions

diff --git a/crates/ra_hir/src/name.rs b/crates/ra_hir/src/name.rs
new file mode 100644
index 000000000..7f42c9f04
--- /dev/null
+++ b/crates/ra_hir/src/name.rs
@@ -0,0 +1,56 @@
+use std::fmt;
+
+use ra_syntax::{ast, SmolStr};
+
+/// `Name` is a wrapper around string, which is used in hir for both references
+/// and declarations. In theory, names should also carry hygene info, but we are
+/// not there yet!
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub struct Name {
+    text: SmolStr,
+}
+
+impl fmt::Display for Name {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        fmt::Display::fmt(&self.text, f)
+    }
+}
+
+impl Name {
+    // TODO: get rid of this?
+    pub(crate) fn as_str(&self) -> &str {
+        self.text.as_str()
+    }
+
+    #[cfg(not(test))]
+    fn new(text: SmolStr) -> Name {
+        Name { text }
+    }
+
+    #[cfg(test)]
+    pub(crate) fn new(text: SmolStr) -> Name {
+        Name { text }
+    }
+}
+
+pub(crate) trait AsName {
+    fn as_name(&self) -> Name;
+}
+
+impl AsName for ast::NameRef<'_> {
+    fn as_name(&self) -> Name {
+        Name::new(self.text())
+    }
+}
+
+impl AsName for ast::Name<'_> {
+    fn as_name(&self) -> Name {
+        Name::new(self.text())
+    }
+}
+
+impl AsName for ra_db::Dependency {
+    fn as_name(&self) -> Name {
+        Name::new(self.name.clone())
+    }
+}