Merge #5698

5698: Display the value of a const on the hover r=jonas-schievink a=JmPotato

Signed-off-by: JmPotato <[email protected]>

Close #4051 

To display the value of a const, I modified the implementation of `ShortLabel` for `ast::Const`.

Co-authored-by: JmPotato <[email protected]>

1 files changed, 5 insertions, 1 deletions

diff --git a/crates/ra_ide/src/display/short_label.rs b/crates/ra_ide/src/display/short_label.rs
index b5ff9fa2d..010c34705 100644
--- a/crates/ra_ide/src/display/short_label.rs
+++ b/crates/ra_ide/src/display/short_label.rs
@@ -61,7 +61,11 @@ impl ShortLabel for ast::TypeAlias {
 
 impl ShortLabel for ast::Const {
     fn short_label(&self) -> Option<String> {
-        short_label_from_ty(self, self.ty(), "const ")
+        let mut new_buf = short_label_from_ty(self, self.ty(), "const ")?;
+        if let Some(expr) = self.body() {
+            format_to!(new_buf, " = {}", expr.syntax());
+        }
+        Some(new_buf)
     }
 }