Merge #8191

8191: syntax: return owned string instead of leaking string r=cynecx a=cynecx

Quick hack? to alleviate https://github.com/rust-analyzer/rust-analyzer/issues/8181#issuecomment-806019126. I haven't run any tests but this should affect performance since we are deallocating more.

r? @matklad 

Co-authored-by: cynecx <me@cynecx.net>

crates/hir/src/semantics.rs

@@ -445,7 +445,7 @@ fn resolve_lifetime_param(&self, lifetime: &ast::Lifetime) -> Option<LifetimePar
                 }
             };
             gpl.lifetime_params()
-                .find(|tp| tp.lifetime().as_ref().map(|lt| lt.text()) == Some(text))
+                .find(|tp| tp.lifetime().as_ref().map(|lt| lt.text()).as_ref() == Some(&text))
         })?;
         let src = self.find_file(lifetime_param.syntax().clone()).with_value(lifetime_param);
         ToDef::to_def(self, src)

crates/hir_expand/src/name.rs

@@ -75,14 +75,14 @@ impl AsName for ast::NameRef {
     fn as_name(&self) -> Name {
         match self.as_tuple_field() {
             Some(idx) => Name::new_tuple_field(idx),
-            None => Name::resolve(self.text()),
+            None => Name::resolve(&self.text()),
         }
     }
 }
 
 impl AsName for ast::Name {
     fn as_name(&self) -> Name {
-        Name::resolve(self.text())
+        Name::resolve(&self.text())
     }
 }
 

crates/ide/src/diagnostics/fixes.rs

@@ -210,7 +210,7 @@ fn missing_record_expr_field_fix(
     }
     let new_field = make::record_field(
         None,
-        make::name(record_expr_field.field_name()?.text()),
+        make::name(&record_expr_field.field_name()?.text()),
         make::ty(&new_field_type.display_source_code(sema.db, module.into()).ok()?),
     );
 

crates/ide/src/inlay_hints.rs

@@ -416,7 +416,7 @@ fn get_string_representation(expr: &ast::Expr) -> Option<String> {
     match expr {
         ast::Expr::MethodCallExpr(method_call_expr) => {
             let name_ref = method_call_expr.name_ref()?;
-            match name_ref.text() {
+            match name_ref.text().as_str() {
                 "clone" => method_call_expr.receiver().map(|rec| rec.to_string()),
                 name_ref => Some(name_ref.to_owned()),
             }

crates/ide/src/syntax_highlighting/format.rs

@@ -31,7 +31,7 @@ fn is_format_string(string: &ast::String) -> Option<()> {
     let parent = string.syntax().parent()?;
 
     let name = parent.parent().and_then(ast::MacroCall::cast)?.path()?.segment()?.name_ref()?;
-    if !matches!(name.text(), "format_args" | "format_args_nl") {
+    if !matches!(name.text().as_str(), "format_args" | "format_args_nl") {
         return None;
     }
 

crates/ide_assists/src/handlers/extract_struct_from_enum_variant.rs

@@ -195,7 +195,7 @@ fn extract_struct_def(
 
 fn update_variant(rewriter: &mut SyntaxRewriter, variant: &ast::Variant) -> Option<()> {
     let name = variant.name()?;
-    let tuple_field = make::tuple_field(None, make::ty(name.text()));
+    let tuple_field = make::tuple_field(None, make::ty(&name.text()));
     let replacement = make::variant(
         name,
         Some(ast::FieldList::TupleFieldList(make::tuple_field_list(iter::once(tuple_field)))),

crates/ide_assists/src/handlers/generate_enum_is_method.rs

@@ -44,7 +44,7 @@ pub(crate) fn generate_enum_is_method(acc: &mut Assists, ctx: &AssistContext) ->
     };
 
     let enum_lowercase_name = to_lower_snake_case(&parent_enum.name()?.to_string());
-    let fn_name = format!("is_{}", &to_lower_snake_case(variant_name.text()));
+    let fn_name = format!("is_{}", &to_lower_snake_case(&variant_name.text()));
 
     // Return early if we've found an existing new fn
     let impl_def = find_struct_impl(&ctx, &parent_enum, &fn_name)?;

crates/ide_assists/src/handlers/generate_enum_projection_method.rs

@@ -132,7 +132,8 @@ fn generate_enum_projection_method(
         ast::StructKind::Unit => return None,
     };
 
-    let fn_name = format!("{}_{}", props.fn_name_prefix, &to_lower_snake_case(variant_name.text()));
+    let fn_name =
+        format!("{}_{}", props.fn_name_prefix, &to_lower_snake_case(&variant_name.text()));
 
     // Return early if we've found an existing new fn
     let impl_def = find_struct_impl(&ctx, &parent_enum, &fn_name)?;

crates/ide_assists/src/handlers/replace_derive_with_manual_impl.rs

@@ -165,7 +165,7 @@ fn impl_def_from_trait(
     }
     let impl_def = make::impl_trait(
         trait_path.clone(),
-        make::path_unqualified(make::path_segment(make::name_ref(annotated_name.text()))),
+        make::path_unqualified(make::path_segment(make::name_ref(&annotated_name.text()))),
     );
     let (impl_def, first_assoc_item) =
         add_trait_assoc_items_to_impl(sema, trait_items, trait_, impl_def, target_scope);
@@ -178,12 +178,13 @@ fn update_attribute(
     trait_name: &ast::NameRef,
     attr: &ast::Attr,
 ) {
+    let trait_name = trait_name.text();
     let new_attr_input = input
         .syntax()
         .descendants_with_tokens()
         .filter(|t| t.kind() == IDENT)
         .filter_map(|t| t.into_token().map(|t| t.text().to_string()))
-        .filter(|t| t != trait_name.text())
+        .filter(|t| t != &trait_name)
         .collect::<Vec<_>>();
     let has_more_derives = !new_attr_input.is_empty();
 

crates/ide_assists/src/utils.rs

@@ -246,7 +246,7 @@ fn invert_special_case(sema: &Semantics<RootDatabase>, expr: &ast::Expr) -> Opti
             let method = mce.name_ref()?;
             let arg_list = mce.arg_list()?;
 
-            let method = match method.text() {
+            let method = match method.text().as_str() {
                 "is_some" => "is_none",
                 "is_none" => "is_some",
                 "is_ok" => "is_err",
@@ -442,7 +442,7 @@ fn generate_impl_text_inner(adt: &ast::Adt, trait_text: Option<&str>, code: &str
         buf.push_str(trait_text);
         buf.push_str(" for ");
     }
-    buf.push_str(adt.name().unwrap().text());
+    buf.push_str(&adt.name().unwrap().text());
     if let Some(generic_params) = generic_params {
         let lifetime_params = generic_params
             .lifetime_params()

crates/ide_db/src/defs.rs

@@ -343,7 +343,7 @@ pub fn classify(
                         hir::AssocItem::TypeAlias(it) => Some(*it),
                         _ => None,
                     })
-                    .find(|alias| &alias.name(sema.db).to_string() == name_ref.text())
+                    .find(|alias| &alias.name(sema.db).to_string() == &name_ref.text())
                 {
                     return Some(NameRefClass::Definition(Definition::ModuleDef(
                         ModuleDef::TypeAlias(ty),

crates/ide_db/src/helpers/import_assets.rs

@@ -288,7 +288,7 @@ fn path_applicable_imports(
                 import_for_item(
                     sema.db,
                     mod_path,
-                    unresolved_first_segment,
+                    &unresolved_first_segment,
                     &unresolved_qualifier,
                     item,
                 )

crates/ide_db/src/helpers/insert_use.rs

@@ -509,7 +509,7 @@ fn new(path: &ast::Path) -> ImportGroup {
             PathSegmentKind::SelfKw => ImportGroup::ThisModule,
             PathSegmentKind::SuperKw => ImportGroup::SuperModule,
             PathSegmentKind::CrateKw => ImportGroup::ThisCrate,
-            PathSegmentKind::Name(name) => match name.text() {
+            PathSegmentKind::Name(name) => match name.text().as_str() {
                 "std" => ImportGroup::Std,
                 "core" => ImportGroup::Std,
                 _ => ImportGroup::ExternCrate,

crates/ide_ssr/src/resolving.rs

@@ -150,7 +150,7 @@ fn resolve(
     fn path_contains_placeholder(&self, path: &ast::Path) -> bool {
         if let Some(segment) = path.segment() {
             if let Some(name_ref) = segment.name_ref() {
-                if self.placeholders_by_stand_in.contains_key(name_ref.text()) {
+                if self.placeholders_by_stand_in.contains_key(name_ref.text().as_str()) {
                     return true;
                 }
             }

crates/syntax/src/ast/make.rs

@@ -268,14 +268,14 @@ pub fn arg_list(args: impl IntoIterator<Item = ast::Expr>) -> ast::ArgList {
 }
 
 pub fn ident_pat(name: ast::Name) -> ast::IdentPat {
-    return from_text(name.text());
+    return from_text(&name.text());
 
     fn from_text(text: &str) -> ast::IdentPat {
         ast_from_text(&format!("fn f({}: ())", text))
     }
 }
 pub fn ident_mut_pat(name: ast::Name) -> ast::IdentPat {
-    return from_text(name.text());
+    return from_text(&name.text());
 
     fn from_text(text: &str) -> ast::IdentPat {
         ast_from_text(&format!("fn f(mut {}: ())", text))

crates/syntax/src/ast/node_ext.rs

@@ -12,19 +12,19 @@
 };
 
 impl ast::Lifetime {
-    pub fn text(&self) -> &str {
+    pub fn text(&self) -> SmolStr {
         text_of_first_token(self.syntax())
     }
 }
 
 impl ast::Name {
-    pub fn text(&self) -> &str {
+    pub fn text(&self) -> SmolStr {
         text_of_first_token(self.syntax())
     }
 }
 
 impl ast::NameRef {
-    pub fn text(&self) -> &str {
+    pub fn text(&self) -> SmolStr {
         text_of_first_token(self.syntax())
     }
 
@@ -33,10 +33,8 @@ pub fn as_tuple_field(&self) -> Option<usize> {
     }
 }
 
-fn text_of_first_token(node: &SyntaxNode) -> &str {
-    let t =
-        node.green().children().next().and_then(|it| it.into_token()).unwrap().text().to_string();
-    Box::leak(Box::new(t))
+fn text_of_first_token(node: &SyntaxNode) -> SmolStr {
+    node.green().children().next().and_then(|it| it.into_token()).unwrap().text().into()
 }
 
 pub enum Macro {
@@ -378,7 +376,7 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
 }
 
 impl NameOrNameRef {
-    pub fn text(&self) -> &str {
+    pub fn text(&self) -> SmolStr {
         match self {
             NameOrNameRef::Name(name) => name.text(),
             NameOrNameRef::NameRef(name_ref) => name_ref.text(),