clippy::redudant_borrow

3 files changed, 5 insertions, 5 deletions

diff --git a/crates/hir_expand/src/builtin_macro.rs b/crates/hir_expand/src/builtin_macro.rs
index 0b310ba2f..51572226e 100644
--- a/crates/hir_expand/src/builtin_macro.rs
+++ b/crates/hir_expand/src/builtin_macro.rs
@@ -354,7 +354,7 @@ fn concat_expand(
                 // concat works with string and char literals, so remove any quotes.
                 // It also works with integer, float and boolean literals, so just use the rest
                 // as-is.
-                let component = unquote_str(&it).unwrap_or_else(|| it.text.to_string());
+                let component = unquote_str(it).unwrap_or_else(|| it.text.to_string());
                 text.push_str(&component);
             }
             // handle boolean literals
@@ -417,7 +417,7 @@ fn parse_string(tt: &tt::Subtree) -> Result<String, mbe::ExpandError> {
     tt.token_trees
         .get(0)
         .and_then(|tt| match tt {
-            tt::TokenTree::Leaf(tt::Leaf::Literal(it)) => unquote_str(&it),
+            tt::TokenTree::Leaf(tt::Leaf::Literal(it)) => unquote_str(it),
             _ => None,
         })
         .ok_or_else(|| mbe::ExpandError::ConversionError)
@@ -561,7 +561,7 @@ mod tests {
     use syntax::ast::NameOwner;
 
     fn expand_builtin_macro(ra_fixture: &str) -> String {
-        let (db, file_id) = TestDB::with_single_file(&ra_fixture);
+        let (db, file_id) = TestDB::with_single_file(ra_fixture);
         let parsed = db.parse(file_id);
         let mut macro_rules: Vec<_> =
             parsed.syntax_node().descendants().filter_map(ast::MacroRules::cast).collect();
diff --git a/crates/hir_expand/src/input.rs b/crates/hir_expand/src/input.rs
index 82dc7f326..bc3ecc593 100644
--- a/crates/hir_expand/src/input.rs
+++ b/crates/hir_expand/src/input.rs
@@ -78,7 +78,7 @@ mod tests {
     use super::*;
 
     fn test_remove_derives_up_to(attr: usize, ra_fixture: &str, expect: Expect) {
-        let (db, file_id) = TestDB::with_single_file(&ra_fixture);
+        let (db, file_id) = TestDB::with_single_file(ra_fixture);
         let parsed = db.parse(file_id);
 
         let mut items: Vec<_> =
diff --git a/crates/hir_expand/src/proc_macro.rs b/crates/hir_expand/src/proc_macro.rs
index dbe1b446e..3ad2d3bf7 100644
--- a/crates/hir_expand/src/proc_macro.rs
+++ b/crates/hir_expand/src/proc_macro.rs
@@ -51,7 +51,7 @@ impl ProcMacroExpander {
                 // Proc macros have access to the environment variables of the invoking crate.
                 let env = &krate_graph[calling_crate].env;
 
-                proc_macro.expander.expand(&tt, attr_arg, &env).map_err(mbe::ExpandError::from)
+                proc_macro.expander.expand(tt, attr_arg, env).map_err(mbe::ExpandError::from)
             }
             None => Err(mbe::ExpandError::UnresolvedProcMacro),
         }