Refactor CallInfo function signatures to new FunctionSignature type

This is used by CallInfo to create a pretty printed function signature that can
be used with completions and other places as well.

1 files changed, 6 insertions, 0 deletions

diff --git a/crates/ra_hir/src/docs.rs b/crates/ra_hir/src/docs.rs
index 5db72c08a..e3a755b46 100644
--- a/crates/ra_hir/src/docs.rs
+++ b/crates/ra_hir/src/docs.rs
@@ -22,6 +22,12 @@ impl Into<String> for Documentation {
     }
 }
 
+impl<'a> Into<String> for &'a Documentation {
+    fn into(self) -> String {
+        self.contents().into()
+    }
+}
+
 pub trait Docs {
     fn docs(&self, db: &impl HirDatabase) -> Option<Documentation>;
 }