1 files changed, 537 insertions, 395 deletions

diff --git a/crates/ide/src/references/rename.rs b/crates/ide/src/references/rename.rs
index 4df189c98..22ddeeae3 100644
--- a/crates/ide/src/references/rename.rs
+++ b/crates/ide/src/references/rename.rs
@@ -1,25 +1,23 @@
 //! FIXME: write short doc here
 use std::fmt::{self, Display};
 
-use hir::{Module, ModuleDef, ModuleSource, Semantics};
+use either::Either;
+use hir::{HasSource, InFile, Module, ModuleDef, ModuleSource, Semantics};
 use ide_db::{
-    base_db::{AnchoredPathBuf, FileId, FileRange},
+    base_db::{AnchoredPathBuf, FileId},
     defs::{Definition, NameClass, NameRefClass},
     search::FileReference,
     RootDatabase,
 };
+use stdx::never;
 use syntax::{
-    algo::find_node_at_offset,
     ast::{self, NameOwner},
-    lex_single_syntax_kind, match_ast, AstNode, SyntaxKind, SyntaxNode, T,
+    lex_single_syntax_kind, AstNode, SyntaxKind, SyntaxNode, T,
 };
 use test_utils::mark;
 use text_edit::TextEdit;
 
-use crate::{
-    FilePosition, FileSystemEdit, RangeInfo, ReferenceKind, ReferenceSearchResult, SourceChange,
-    TextRange,
-};
+use crate::{display::TryToNav, FilePosition, FileSystemEdit, RangeInfo, SourceChange, TextRange};
 
 type RenameResult<T> = Result<T, RenameError>;
 #[derive(Debug)]
@@ -40,6 +38,8 @@ macro_rules! bail {
     ($($tokens:tt)*) => {return Err(format_err!($($tokens)*))}
 }
 
+/// Prepares a rename. The sole job of this function is to return the TextRange of the thing that is
+/// being targeted for a rename.
 pub(crate) fn prepare_rename(
     db: &RootDatabase,
     position: FilePosition,
@@ -47,20 +47,32 @@ pub(crate) fn prepare_rename(
     let sema = Semantics::new(db);
     let source_file = sema.parse(position.file_id);
     let syntax = source_file.syntax();
-    if let Some(module) = find_module_at_offset(&sema, position, syntax) {
-        rename_mod(&sema, position, module, "dummy")
-    } else {
-        let RangeInfo { range, .. } = find_all_refs(&sema, position)?;
-        Ok(RangeInfo::new(range, SourceChange::default()))
-    }
-    .map(|info| RangeInfo::new(info.range, ()))
-}
-
+    let range = match &sema
+        .find_node_at_offset_with_descend(&syntax, position.offset)
+        .ok_or_else(|| format_err!("No references found at position"))?
+    {
+        ast::NameLike::Name(it) => it.syntax(),
+        ast::NameLike::NameRef(it) => it.syntax(),
+        ast::NameLike::Lifetime(it) => it.syntax(),
+    }
+    .text_range();
+    Ok(RangeInfo::new(range, ()))
+}
+
+// Feature: Rename
+//
+// Renames the item below the cursor and all of its references
+//
+// |===
+// | Editor  | Shortcut
+//
+// | VS Code | kbd:[F2]
+// |===
 pub(crate) fn rename(
     db: &RootDatabase,
     position: FilePosition,
     new_name: &str,
-) -> RenameResult<RangeInfo<SourceChange>> {
+) -> RenameResult<SourceChange> {
     let sema = Semantics::new(db);
     rename_with_semantics(&sema, position, new_name)
 }
@@ -69,14 +81,14 @@ pub(crate) fn rename_with_semantics(
     sema: &Semantics<RootDatabase>,
     position: FilePosition,
     new_name: &str,
-) -> RenameResult<RangeInfo<SourceChange>> {
+) -> RenameResult<SourceChange> {
     let source_file = sema.parse(position.file_id);
     let syntax = source_file.syntax();
 
-    if let Some(module) = find_module_at_offset(&sema, position, syntax) {
-        rename_mod(&sema, position, module, new_name)
-    } else {
-        rename_reference(&sema, position, new_name)
+    let def = find_definition(sema, syntax, position)?;
+    match def {
+        Definition::ModuleDef(ModuleDef::Module(module)) => rename_mod(&sema, module, new_name),
+        def => rename_reference(sema, def, new_name),
     }
 }
 
@@ -87,12 +99,7 @@ pub(crate) fn will_rename_file(
 ) -> Option<SourceChange> {
     let sema = Semantics::new(db);
     let module = sema.to_module_def(file_id)?;
-
-    let decl = module.declaration_source(db)?;
-    let range = decl.value.name()?.syntax().text_range();
-
-    let position = FilePosition { file_id: decl.file_id.original_file(db), offset: range.start() };
-    let mut change = rename_mod(&sema, position, module, new_name_stem).ok()?.info;
+    let mut change = rename_mod(&sema, module, new_name_stem).ok()?;
     change.file_system_edits.clear();
     Some(change)
 }
@@ -124,179 +131,232 @@ fn check_identifier(new_name: &str) -> RenameResult<IdentifierKind> {
     }
 }
 
-fn find_module_at_offset(
+fn find_definition(
     sema: &Semantics<RootDatabase>,
-    position: FilePosition,
     syntax: &SyntaxNode,
-) -> Option<Module> {
-    let ident = syntax.token_at_offset(position.offset).find(|t| t.kind() == SyntaxKind::IDENT)?;
-
-    let module = match_ast! {
-        match (ident.parent()) {
-            ast::NameRef(name_ref) => {
-                match NameRefClass::classify(sema, &name_ref)? {
-                    NameRefClass::Definition(Definition::ModuleDef(ModuleDef::Module(module))) => module,
-                    _ => return None,
-                }
-            },
-            ast::Name(name) => {
-                match NameClass::classify(&sema, &name)? {
-                    NameClass::Definition(Definition::ModuleDef(ModuleDef::Module(module))) => module,
-                    _ => return None,
-                }
-            },
-            _ => return None,
-        }
-    };
-
-    Some(module)
-}
-
-fn find_all_refs(
-    sema: &Semantics<RootDatabase>,
     position: FilePosition,
-) -> RenameResult<RangeInfo<ReferenceSearchResult>> {
-    crate::references::find_all_refs(sema, position, None)
-        .ok_or_else(|| format_err!("No references found at position"))
+) -> RenameResult<Definition> {
+    match sema
+        .find_node_at_offset_with_descend(syntax, position.offset)
+        .ok_or_else(|| format_err!("No references found at position"))?
+    {
+        // renaming aliases would rename the item being aliased as the HIR doesn't track aliases yet
+        ast::NameLike::Name(name)
+            if name.syntax().parent().map_or(false, |it| ast::Rename::can_cast(it.kind())) =>
+        {
+            bail!("Renaming aliases is currently unsupported")
+        }
+        ast::NameLike::Name(name) => {
+            NameClass::classify(sema, &name).map(|class| class.referenced_or_defined(sema.db))
+        }
+        ast::NameLike::NameRef(name_ref) => {
+            NameRefClass::classify(sema, &name_ref).map(|class| class.referenced(sema.db))
+        }
+        ast::NameLike::Lifetime(lifetime) => NameRefClass::classify_lifetime(sema, &lifetime)
+            .map(|class| NameRefClass::referenced(class, sema.db))
+            .or_else(|| {
+                NameClass::classify_lifetime(sema, &lifetime)
+                    .map(|it| it.referenced_or_defined(sema.db))
+            }),
+    }
+    .ok_or_else(|| format_err!("No references found at position"))
 }
 
 fn source_edit_from_references(
-    sema: &Semantics<RootDatabase>,
+    _sema: &Semantics<RootDatabase>,
     file_id: FileId,
     references: &[FileReference],
+    def: Definition,
     new_name: &str,
 ) -> (FileId, TextEdit) {
     let mut edit = TextEdit::builder();
     for reference in references {
-        let mut replacement_text = String::new();
-        let range = match reference.kind {
-            ReferenceKind::FieldShorthandForField => {
-                mark::hit!(test_rename_struct_field_for_shorthand);
-                replacement_text.push_str(new_name);
-                replacement_text.push_str(": ");
-                TextRange::new(reference.range.start(), reference.range.start())
-            }
-            ReferenceKind::FieldShorthandForLocal => {
-                mark::hit!(test_rename_local_for_field_shorthand);
-                replacement_text.push_str(": ");
-                replacement_text.push_str(new_name);
-                TextRange::new(reference.range.end(), reference.range.end())
+        let (range, replacement) = match &reference.name {
+            // if the ranges differ then the node is inside a macro call, we can't really attempt
+            // to make special rewrites like shorthand syntax and such, so just rename the node in
+            // the macro input
+            ast::NameLike::NameRef(name_ref)
+                if name_ref.syntax().text_range() == reference.range =>
+            {
+                source_edit_from_name_ref(name_ref, new_name, def)
             }
-            ReferenceKind::RecordFieldExprOrPat => {
-                mark::hit!(test_rename_field_expr_pat);
-                replacement_text.push_str(new_name);
-                edit_text_range_for_record_field_expr_or_pat(
-                    sema,
-                    FileRange { file_id, range: reference.range },
-                    new_name,
-                )
+            ast::NameLike::Name(name) if name.syntax().text_range() == reference.range => {
+                source_edit_from_name(name, new_name)
             }
-            _ => {
-                replacement_text.push_str(new_name);
-                reference.range
-            }
-        };
-        edit.replace(range, replacement_text);
+            _ => None,
+        }
+        .unwrap_or_else(|| (reference.range, new_name.to_string()));
+        edit.replace(range, replacement);
     }
     (file_id, edit.finish())
 }
 
-fn edit_text_range_for_record_field_expr_or_pat(
-    sema: &Semantics<RootDatabase>,
-    file_range: FileRange,
+fn source_edit_from_name(name: &ast::Name, new_name: &str) -> Option<(TextRange, String)> {
+    if let Some(_) = ast::RecordPatField::for_field_name(name) {
+        if let Some(ident_pat) = name.syntax().parent().and_then(ast::IdentPat::cast) {
+            return Some((
+                TextRange::empty(ident_pat.syntax().text_range().start()),
+                format!("{}: ", new_name),
+            ));
+        }
+    }
+    None
+}
+
+fn source_edit_from_name_ref(
+    name_ref: &ast::NameRef,
     new_name: &str,
-) -> TextRange {
-    let source_file = sema.parse(file_range.file_id);
-    let file_syntax = source_file.syntax();
-    let original_range = file_range.range;
-
-    syntax::algo::find_node_at_range::<ast::RecordExprField>(file_syntax, original_range)
-        .and_then(|field_expr| match field_expr.expr().and_then(|e| e.name_ref()) {
-            Some(name) if &name.to_string() == new_name => Some(field_expr.syntax().text_range()),
-            _ => None,
-        })
-        .or_else(|| {
-            syntax::algo::find_node_at_range::<ast::RecordPatField>(file_syntax, original_range)
-                .and_then(|field_pat| match field_pat.pat() {
-                    Some(ast::Pat::IdentPat(pat))
-                        if pat.name().map(|n| n.to_string()).as_deref() == Some(new_name) =>
-                    {
-                        Some(field_pat.syntax().text_range())
+    def: Definition,
+) -> Option<(TextRange, String)> {
+    if let Some(record_field) = ast::RecordExprField::for_name_ref(name_ref) {
+        let rcf_name_ref = record_field.name_ref();
+        let rcf_expr = record_field.expr();
+        match (rcf_name_ref, rcf_expr.and_then(|it| it.name_ref())) {
+            // field: init-expr, check if we can use a field init shorthand
+            (Some(field_name), Some(init)) => {
+                if field_name == *name_ref {
+                    if init.text() == new_name {
+                        mark::hit!(test_rename_field_put_init_shorthand);
+                        // same names, we can use a shorthand here instead.
+                        // we do not want to erase attributes hence this range start
+                        let s = field_name.syntax().text_range().start();
+                        let e = record_field.syntax().text_range().end();
+                        return Some((TextRange::new(s, e), new_name.to_owned()));
                     }
-                    _ => None,
-                })
-        })
-        .unwrap_or(original_range)
+                } else if init == *name_ref {
+                    if field_name.text() == new_name {
+                        mark::hit!(test_rename_local_put_init_shorthand);
+                        // same names, we can use a shorthand here instead.
+                        // we do not want to erase attributes hence this range start
+                        let s = field_name.syntax().text_range().start();
+                        let e = record_field.syntax().text_range().end();
+                        return Some((TextRange::new(s, e), new_name.to_owned()));
+                    }
+                }
+                None
+            }
+            // init shorthand
+            // FIXME: instead of splitting the shorthand, recursively trigger a rename of the
+            // other name https://github.com/rust-analyzer/rust-analyzer/issues/6547
+            (None, Some(_)) if matches!(def, Definition::Field(_)) => {
+                mark::hit!(test_rename_field_in_field_shorthand);
+                let s = name_ref.syntax().text_range().start();
+                Some((TextRange::empty(s), format!("{}: ", new_name)))
+            }
+            (None, Some(_)) if matches!(def, Definition::Local(_)) => {
+                mark::hit!(test_rename_local_in_field_shorthand);
+                let s = name_ref.syntax().text_range().end();
+                Some((TextRange::empty(s), format!(": {}", new_name)))
+            }
+            _ => None,
+        }
+    } else if let Some(record_field) = ast::RecordPatField::for_field_name_ref(name_ref) {
+        let rcf_name_ref = record_field.name_ref();
+        let rcf_pat = record_field.pat();
+        match (rcf_name_ref, rcf_pat) {
+            // field: rename
+            (Some(field_name), Some(ast::Pat::IdentPat(pat))) if field_name == *name_ref => {
+                // field name is being renamed
+                if pat.name().map_or(false, |it| it.text() == new_name) {
+                    mark::hit!(test_rename_field_put_init_shorthand_pat);
+                    // same names, we can use a shorthand here instead/
+                    // we do not want to erase attributes hence this range start
+                    let s = field_name.syntax().text_range().start();
+                    let e = record_field.syntax().text_range().end();
+                    Some((TextRange::new(s, e), pat.to_string()))
+                } else {
+                    None
+                }
+            }
+            _ => None,
+        }
+    } else {
+        None
+    }
 }
 
 fn rename_mod(
     sema: &Semantics<RootDatabase>,
-    position: FilePosition,
     module: Module,
     new_name: &str,
-) -> RenameResult<RangeInfo<SourceChange>> {
+) -> RenameResult<SourceChange> {
     if IdentifierKind::Ident != check_identifier(new_name)? {
         bail!("Invalid name `{0}`: cannot rename module to {0}", new_name);
     }
 
     let mut source_change = SourceChange::default();
 
-    let src = module.definition_source(sema.db);
-    let file_id = src.file_id.original_file(sema.db);
-    match src.value {
-        ModuleSource::SourceFile(..) => {
-            // mod is defined in path/to/dir/mod.rs
-            let path = if module.is_mod_rs(sema.db) {
-                format!("../{}/mod.rs", new_name)
-            } else {
-                format!("{}.rs", new_name)
-            };
-            let dst = AnchoredPathBuf { anchor: file_id, path };
-            let move_file = FileSystemEdit::MoveFile { src: file_id, dst };
-            source_change.push_file_system_edit(move_file);
-        }
-        ModuleSource::Module(..) => {}
-    }
-
-    if let Some(src) = module.declaration_source(sema.db) {
-        let file_id = src.file_id.original_file(sema.db);
-        let name = src.value.name().unwrap();
-        source_change.insert_source_edit(
-            file_id,
-            TextEdit::replace(name.syntax().text_range(), new_name.into()),
-        );
+    let InFile { file_id, value: def_source } = module.definition_source(sema.db);
+    let file_id = file_id.original_file(sema.db);
+    if let ModuleSource::SourceFile(..) = def_source {
+        // mod is defined in path/to/dir/mod.rs
+        let path = if module.is_mod_rs(sema.db) {
+            format!("../{}/mod.rs", new_name)
+        } else {
+            format!("{}.rs", new_name)
+        };
+        let dst = AnchoredPathBuf { anchor: file_id, path };
+        let move_file = FileSystemEdit::MoveFile { src: file_id, dst };
+        source_change.push_file_system_edit(move_file);
+    }
+
+    if let Some(InFile { file_id, value: decl_source }) = module.declaration_source(sema.db) {
+        let file_id = file_id.original_file(sema.db);
+        match decl_source.name() {
+            Some(name) => source_change.insert_source_edit(
+                file_id,
+                TextEdit::replace(name.syntax().text_range(), new_name.to_string()),
+            ),
+            _ => unreachable!(),
+        };
     }
-
-    let RangeInfo { range, info: refs } = find_all_refs(sema, position)?;
-    let ref_edits = refs.references().iter().map(|(&file_id, references)| {
-        source_edit_from_references(sema, file_id, references, new_name)
+    let def = Definition::ModuleDef(ModuleDef::Module(module));
+    let usages = def.usages(sema).all();
+    let ref_edits = usages.iter().map(|(&file_id, references)| {
+        source_edit_from_references(sema, file_id, references, def, new_name)
     });
     source_change.extend(ref_edits);
 
-    Ok(RangeInfo::new(range, source_change))
+    Ok(source_change)
 }
 
-fn rename_to_self(
-    sema: &Semantics<RootDatabase>,
-    position: FilePosition,
-) -> Result<RangeInfo<SourceChange>, RenameError> {
-    let source_file = sema.parse(position.file_id);
-    let syn = source_file.syntax();
+fn rename_to_self(sema: &Semantics<RootDatabase>, local: hir::Local) -> RenameResult<SourceChange> {
+    if never!(local.is_self(sema.db)) {
+        bail!("rename_to_self invoked on self");
+    }
+
+    let fn_def = match local.parent(sema.db) {
+        hir::DefWithBody::Function(func) => func,
+        _ => bail!("Cannot rename non-param local to self"),
+    };
 
-    let (fn_def, fn_ast) = find_node_at_offset::<ast::Fn>(syn, position.offset)
-        .and_then(|fn_ast| sema.to_def(&fn_ast).zip(Some(fn_ast)))
-        .ok_or_else(|| format_err!("No surrounding method declaration found"))?;
-    let param_range = fn_ast
+    // FIXME: reimplement this on the hir instead
+    // as of the time of this writing params in hir don't keep their names
+    let fn_ast = fn_def
+        .source(sema.db)
+        .ok_or_else(|| format_err!("Cannot rename non-param local to self"))?
+        .value;
+
+    let first_param_range = fn_ast
         .param_list()
         .and_then(|p| p.params().next())
         .ok_or_else(|| format_err!("Method has no parameters"))?
         .syntax()
         .text_range();
-    if !param_range.contains(position.offset) {
-        bail!("Only the first parameter can be self");
+    let InFile { file_id, value: local_source } = local.source(sema.db);
+    match local_source {
+        either::Either::Left(pat)
+            if !first_param_range.contains_range(pat.syntax().text_range()) =>
+        {
+            bail!("Only the first parameter can be self");
+        }
+        _ => (),
     }
 
-    let impl_block = find_node_at_offset::<ast::Impl>(syn, position.offset)
+    let impl_block = fn_ast
+        .syntax()
+        .ancestors()
+        .find_map(|node| ast::Impl::cast(node))
         .and_then(|def| sema.to_def(&def))
         .ok_or_else(|| format_err!("No impl block found for function"))?;
     if fn_def.self_param(sema.db).is_some() {
@@ -320,25 +380,21 @@ fn rename_to_self(
         bail!("Parameter type differs from impl block type");
     }
 
-    let RangeInfo { range, info: refs } = find_all_refs(sema, position)?;
-
+    let def = Definition::Local(local);
+    let usages = def.usages(sema).all();
     let mut source_change = SourceChange::default();
-    source_change.extend(refs.references().iter().map(|(&file_id, references)| {
-        source_edit_from_references(sema, file_id, references, "self")
+    source_change.extend(usages.iter().map(|(&file_id, references)| {
+        source_edit_from_references(sema, file_id, references, def, "self")
     }));
     source_change.insert_source_edit(
-        position.file_id,
-        TextEdit::replace(param_range, String::from(self_param)),
+        file_id.original_file(sema.db),
+        TextEdit::replace(first_param_range, String::from(self_param)),
     );
 
-    Ok(RangeInfo::new(range, source_change))
+    Ok(source_change)
 }
 
-fn text_edit_from_self_param(
-    syn: &SyntaxNode,
-    self_param: &ast::SelfParam,
-    new_name: &str,
-) -> Option<TextEdit> {
+fn text_edit_from_self_param(self_param: &ast::SelfParam, new_name: &str) -> Option<TextEdit> {
     fn target_type_name(impl_def: &ast::Impl) -> Option<String> {
         if let Some(ast::Type::PathType(p)) = impl_def.self_ty() {
             return Some(p.path()?.segment()?.name_ref()?.text().to_string());
@@ -346,7 +402,7 @@ fn text_edit_from_self_param(
         None
     }
 
-    let impl_def = find_node_at_offset::<ast::Impl>(syn, self_param.syntax().text_range().start())?;
+    let impl_def = self_param.syntax().ancestors().find_map(|it| ast::Impl::cast(it))?;
     let type_name = target_type_name(&impl_def)?;
 
     let mut replacement_text = String::from(new_name);
@@ -363,94 +419,119 @@ fn text_edit_from_self_param(
 
 fn rename_self_to_param(
     sema: &Semantics<RootDatabase>,
-    position: FilePosition,
+    local: hir::Local,
     new_name: &str,
-    ident_kind: IdentifierKind,
-    range: TextRange,
-    refs: ReferenceSearchResult,
-) -> Result<RangeInfo<SourceChange>, RenameError> {
-    match ident_kind {
-        IdentifierKind::Lifetime => bail!("Invalid name `{}`: not an identifier", new_name),
-        IdentifierKind::ToSelf => {
-            // no-op
-            mark::hit!(rename_self_to_self);
-            return Ok(RangeInfo::new(range, SourceChange::default()));
+    identifier_kind: IdentifierKind,
+) -> RenameResult<SourceChange> {
+    let (file_id, self_param) = match local.source(sema.db) {
+        InFile { file_id, value: Either::Right(self_param) } => (file_id, self_param),
+        _ => {
+            never!(true, "rename_self_to_param invoked on a non-self local");
+            bail!("rename_self_to_param invoked on a non-self local");
         }
-        _ => (),
-    }
-    let source_file = sema.parse(position.file_id);
-    let syn = source_file.syntax();
-
-    let fn_def = find_node_at_offset::<ast::Fn>(syn, position.offset)
-        .ok_or_else(|| format_err!("No surrounding method declaration found"))?;
-
-    let mut source_change = SourceChange::default();
-    if let Some(self_param) = fn_def.param_list().and_then(|it| it.self_param()) {
-        if self_param
-            .syntax()
-            .text_range()
-            .contains_range(refs.declaration().nav.focus_or_full_range())
-        {
-            let edit = text_edit_from_self_param(syn, &self_param, new_name)
-                .ok_or_else(|| format_err!("No target type found"))?;
-            source_change.insert_source_edit(position.file_id, edit);
-
-            source_change.extend(refs.references().iter().map(|(&file_id, references)| {
-                source_edit_from_references(sema, file_id, &references, new_name)
-            }));
-
-            if source_change.source_file_edits.len() > 1 && ident_kind == IdentifierKind::Underscore
-            {
-                bail!("Cannot rename reference to `_` as it is being referenced multiple times");
-            }
+    };
 
-            return Ok(RangeInfo::new(range, source_change));
-        }
+    let def = Definition::Local(local);
+    let usages = def.usages(sema).all();
+    let edit = text_edit_from_self_param(&self_param, new_name)
+        .ok_or_else(|| format_err!("No target type found"))?;
+    if usages.len() > 1 && identifier_kind == IdentifierKind::Underscore {
+        bail!("Cannot rename reference to `_` as it is being referenced multiple times");
     }
-    Err(format_err!("Method has no self param"))
+    let mut source_change = SourceChange::default();
+    source_change.insert_source_edit(file_id.original_file(sema.db), edit);
+    source_change.extend(usages.iter().map(|(&file_id, references)| {
+        source_edit_from_references(sema, file_id, &references, def, new_name)
+    }));
+    Ok(source_change)
 }
 
 fn rename_reference(
     sema: &Semantics<RootDatabase>,
-    position: FilePosition,
+    def: Definition,
     new_name: &str,
-) -> Result<RangeInfo<SourceChange>, RenameError> {
+) -> RenameResult<SourceChange> {
     let ident_kind = check_identifier(new_name)?;
-    let RangeInfo { range, info: refs } = find_all_refs(sema, position)?;
 
-    match (ident_kind, &refs.declaration.kind) {
-        (IdentifierKind::ToSelf, ReferenceKind::Lifetime)
-        | (IdentifierKind::Underscore, ReferenceKind::Lifetime)
-        | (IdentifierKind::Ident, ReferenceKind::Lifetime) => {
+    let def_is_lbl_or_lt = matches!(
+        def,
+        Definition::GenericParam(hir::GenericParam::LifetimeParam(_)) | Definition::Label(_)
+    );
+    match (ident_kind, def) {
+        (IdentifierKind::ToSelf, _)
+        | (IdentifierKind::Underscore, _)
+        | (IdentifierKind::Ident, _)
+            if def_is_lbl_or_lt =>
+        {
             mark::hit!(rename_not_a_lifetime_ident_ref);
             bail!("Invalid name `{}`: not a lifetime identifier", new_name)
         }
-        (IdentifierKind::Lifetime, ReferenceKind::Lifetime) => mark::hit!(rename_lifetime),
+        (IdentifierKind::Lifetime, _) if def_is_lbl_or_lt => mark::hit!(rename_lifetime),
         (IdentifierKind::Lifetime, _) => {
             mark::hit!(rename_not_an_ident_ref);
             bail!("Invalid name `{}`: not an identifier", new_name)
         }
-        (_, ReferenceKind::SelfParam) => {
+        (IdentifierKind::ToSelf, Definition::Local(local)) if local.is_self(sema.db) => {
+            // no-op
+            mark::hit!(rename_self_to_self);
+            return Ok(SourceChange::default());
+        }
+        (ident_kind, Definition::Local(local)) if local.is_self(sema.db) => {
             mark::hit!(rename_self_to_param);
-            return rename_self_to_param(sema, position, new_name, ident_kind, range, refs);
+            return rename_self_to_param(sema, local, new_name, ident_kind);
         }
-        (IdentifierKind::ToSelf, _) => {
+        (IdentifierKind::ToSelf, Definition::Local(local)) => {
             mark::hit!(rename_to_self);
-            return rename_to_self(sema, position);
-        }
-        (IdentifierKind::Underscore, _) if !refs.references.is_empty() => {
-            mark::hit!(rename_underscore_multiple);
-            bail!("Cannot rename reference to `_` as it is being referenced multiple times")
+            return rename_to_self(sema, local);
         }
+        (IdentifierKind::ToSelf, _) => bail!("Invalid name `{}`: not an identifier", new_name),
         (IdentifierKind::Ident, _) | (IdentifierKind::Underscore, _) => mark::hit!(rename_ident),
     }
 
+    let usages = def.usages(sema).all();
+    if !usages.is_empty() && ident_kind == IdentifierKind::Underscore {
+        mark::hit!(rename_underscore_multiple);
+        bail!("Cannot rename reference to `_` as it is being referenced multiple times");
+    }
     let mut source_change = SourceChange::default();
-    source_change.extend(refs.into_iter().map(|(file_id, references)| {
-        source_edit_from_references(sema, file_id, &references, new_name)
+    source_change.extend(usages.iter().map(|(&file_id, references)| {
+        source_edit_from_references(sema, file_id, &references, def, new_name)
     }));
 
-    Ok(RangeInfo::new(range, source_change))
+    let (file_id, edit) = source_edit_from_def(sema, def, new_name)?;
+    source_change.insert_source_edit(file_id, edit);
+    Ok(source_change)
+}
+
+fn source_edit_from_def(
+    sema: &Semantics<RootDatabase>,
+    def: Definition,
+    new_name: &str,
+) -> RenameResult<(FileId, TextEdit)> {
+    let nav = def.try_to_nav(sema.db).unwrap();
+
+    let mut replacement_text = String::new();
+    let mut repl_range = nav.focus_or_full_range();
+    if let Definition::Local(local) = def {
+        if let Either::Left(pat) = local.source(sema.db).value {
+            if matches!(
+                pat.syntax().parent().and_then(ast::RecordPatField::cast),
+                Some(pat_field) if pat_field.name_ref().is_none()
+            ) {
+                replacement_text.push_str(": ");
+                replacement_text.push_str(new_name);
+                repl_range = TextRange::new(
+                    pat.syntax().text_range().end(),
+                    pat.syntax().text_range().end(),
+                );
+            }
+        }
+    }
+    if replacement_text.is_empty() {
+        replacement_text.push_str(new_name);
+    }
+    let edit = TextEdit::replace(repl_range, replacement_text);
+    Ok((nav.file_id, edit))
 }
 
 #[cfg(test)]
@@ -472,7 +553,7 @@ mod tests {
             Ok(source_change) => {
                 let mut text_edit_builder = TextEdit::builder();
                 let mut file_id: Option<FileId> = None;
-                for edit in source_change.info.source_file_edits {
+                for edit in source_change.source_file_edits {
                     file_id = Some(edit.0);
                     for indel in edit.1.into_iter() {
                         text_edit_builder.replace(indel.delete, indel.insert);
@@ -502,10 +583,8 @@ mod tests {
 
     fn check_expect(new_name: &str, ra_fixture: &str, expect: Expect) {
         let (analysis, position) = fixture::position(ra_fixture);
-        let source_change = analysis
-            .rename(position, new_name)
-            .unwrap()
-            .expect("Expect returned RangeInfo to be Some, but was None");
+        let source_change =
+            analysis.rename(position, new_name).unwrap().expect("Expect returned a RenameError");
         expect.assert_debug_eq(&source_change)
     }
 
@@ -749,8 +828,8 @@ impl Foo {
     }
 
     #[test]
-    fn test_rename_struct_field_for_shorthand() {
-        mark::check!(test_rename_struct_field_for_shorthand);
+    fn test_rename_field_in_field_shorthand() {
+        mark::check!(test_rename_field_in_field_shorthand);
         check(
             "j",
             r#"
@@ -775,8 +854,8 @@ impl Foo {
     }
 
     #[test]
-    fn test_rename_local_for_field_shorthand() {
-        mark::check!(test_rename_local_for_field_shorthand);
+    fn test_rename_local_in_field_shorthand() {
+        mark::check!(test_rename_local_in_field_shorthand);
         check(
             "j",
             r#"
@@ -871,36 +950,33 @@ mod foo$0;
 // empty
 "#,
             expect![[r#"
-                RangeInfo {
-                    range: 4..7,
-                    info: SourceChange {
-                        source_file_edits: {
-                            FileId(
-                                1,
-                            ): TextEdit {
-                                indels: [
-                                    Indel {
-                                        insert: "foo2",
-                                        delete: 4..7,
-                                    },
-                                ],
-                            },
+                SourceChange {
+                    source_file_edits: {
+                        FileId(
+                            1,
+                        ): TextEdit {
+                            indels: [
+                                Indel {
+                                    insert: "foo2",
+                                    delete: 4..7,
+                                },
+                            ],
                         },
-                        file_system_edits: [
-                            MoveFile {
-                                src: FileId(
+                    },
+                    file_system_edits: [
+                        MoveFile {
+                            src: FileId(
+                                2,
+                            ),
+                            dst: AnchoredPathBuf {
+                                anchor: FileId(
                                     2,
                                 ),
-                                dst: AnchoredPathBuf {
-                                    anchor: FileId(
-                                        2,
-                                    ),
-                                    path: "foo2.rs",
-                                },
+                                path: "foo2.rs",
                             },
-                        ],
-                        is_snippet: false,
-                    },
+                        },
+                    ],
+                    is_snippet: false,
                 }
             "#]],
         );
@@ -923,46 +999,43 @@ pub struct FooContent;
 use crate::foo$0::FooContent;
 "#,
             expect![[r#"
-                RangeInfo {
-                    range: 11..14,
-                    info: SourceChange {
-                        source_file_edits: {
-                            FileId(
-                                0,
-                            ): TextEdit {
-                                indels: [
-                                    Indel {
-                                        insert: "quux",
-                                        delete: 8..11,
-                                    },
-                                ],
-                            },
-                            FileId(
-                                2,
-                            ): TextEdit {
-                                indels: [
-                                    Indel {
-                                        insert: "quux",
-                                        delete: 11..14,
-                                    },
-                                ],
-                            },
+                SourceChange {
+                    source_file_edits: {
+                        FileId(
+                            0,
+                        ): TextEdit {
+                            indels: [
+                                Indel {
+                                    insert: "quux",
+                                    delete: 8..11,
+                                },
+                            ],
                         },
-                        file_system_edits: [
-                            MoveFile {
-                                src: FileId(
+                        FileId(
+                            2,
+                        ): TextEdit {
+                            indels: [
+                                Indel {
+                                    insert: "quux",
+                                    delete: 11..14,
+                                },
+                            ],
+                        },
+                    },
+                    file_system_edits: [
+                        MoveFile {
+                            src: FileId(
+                                1,
+                            ),
+                            dst: AnchoredPathBuf {
+                                anchor: FileId(
                                     1,
                                 ),
-                                dst: AnchoredPathBuf {
-                                    anchor: FileId(
-                                        1,
-                                    ),
-                                    path: "quux.rs",
-                                },
+                                path: "quux.rs",
                             },
-                        ],
-                        is_snippet: false,
-                    },
+                        },
+                    ],
+                    is_snippet: false,
                 }
             "#]],
         );
@@ -979,36 +1052,33 @@ mod fo$0o;
 // empty
 "#,
             expect![[r#"
-                RangeInfo {
-                    range: 4..7,
-                    info: SourceChange {
-                        source_file_edits: {
-                            FileId(
-                                0,
-                            ): TextEdit {
-                                indels: [
-                                    Indel {
-                                        insert: "foo2",
-                                        delete: 4..7,
-                                    },
-                                ],
-                            },
+                SourceChange {
+                    source_file_edits: {
+                        FileId(
+                            0,
+                        ): TextEdit {
+                            indels: [
+                                Indel {
+                                    insert: "foo2",
+                                    delete: 4..7,
+                                },
+                            ],
                         },
-                        file_system_edits: [
-                            MoveFile {
-                                src: FileId(
+                    },
+                    file_system_edits: [
+                        MoveFile {
+                            src: FileId(
+                                1,
+                            ),
+                            dst: AnchoredPathBuf {
+                                anchor: FileId(
                                     1,
                                 ),
-                                dst: AnchoredPathBuf {
-                                    anchor: FileId(
-                                        1,
-                                    ),
-                                    path: "../foo2/mod.rs",
-                                },
+                                path: "../foo2/mod.rs",
                             },
-                        ],
-                        is_snippet: false,
-                    },
+                        },
+                    ],
+                    is_snippet: false,
                 }
             "#]],
         );
@@ -1026,36 +1096,33 @@ mod outer { mod fo$0o; }
 // empty
 "#,
             expect![[r#"
-                RangeInfo {
-                    range: 16..19,
-                    info: SourceChange {
-                        source_file_edits: {
-                            FileId(
-                                0,
-                            ): TextEdit {
-                                indels: [
-                                    Indel {
-                                        insert: "bar",
-                                        delete: 16..19,
-                                    },
-                                ],
-                            },
+                SourceChange {
+                    source_file_edits: {
+                        FileId(
+                            0,
+                        ): TextEdit {
+                            indels: [
+                                Indel {
+                                    insert: "bar",
+                                    delete: 16..19,
+                                },
+                            ],
                         },
-                        file_system_edits: [
-                            MoveFile {
-                                src: FileId(
+                    },
+                    file_system_edits: [
+                        MoveFile {
+                            src: FileId(
+                                1,
+                            ),
+                            dst: AnchoredPathBuf {
+                                anchor: FileId(
                                     1,
                                 ),
-                                dst: AnchoredPathBuf {
-                                    anchor: FileId(
-                                        1,
-                                    ),
-                                    path: "bar.rs",
-                                },
+                                path: "bar.rs",
                             },
-                        ],
-                        is_snippet: false,
-                    },
+                        },
+                    ],
+                    is_snippet: false,
                 }
             "#]],
         );
@@ -1096,46 +1163,43 @@ pub mod foo$0;
 // pub fn fun() {}
 "#,
             expect![[r#"
-                RangeInfo {
-                    range: 8..11,
-                    info: SourceChange {
-                        source_file_edits: {
-                            FileId(
-                                0,
-                            ): TextEdit {
-                                indels: [
-                                    Indel {
-                                        insert: "foo2",
-                                        delete: 27..30,
-                                    },
-                                ],
-                            },
-                            FileId(
-                                1,
-                            ): TextEdit {
-                                indels: [
-                                    Indel {
-                                        insert: "foo2",
-                                        delete: 8..11,
-                                    },
-                                ],
-                            },
+                SourceChange {
+                    source_file_edits: {
+                        FileId(
+                            0,
+                        ): TextEdit {
+                            indels: [
+                                Indel {
+                                    insert: "foo2",
+                                    delete: 27..30,
+                                },
+                            ],
+                        },
+                        FileId(
+                            1,
+                        ): TextEdit {
+                            indels: [
+                                Indel {
+                                    insert: "foo2",
+                                    delete: 8..11,
+                                },
+                            ],
                         },
-                        file_system_edits: [
-                            MoveFile {
-                                src: FileId(
+                    },
+                    file_system_edits: [
+                        MoveFile {
+                            src: FileId(
+                                2,
+                            ),
+                            dst: AnchoredPathBuf {
+                                anchor: FileId(
                                     2,
                                 ),
-                                dst: AnchoredPathBuf {
-                                    anchor: FileId(
-                                        2,
-                                    ),
-                                    path: "foo2.rs",
-                                },
+                                path: "foo2.rs",
                             },
-                        ],
-                        is_snippet: false,
-                    },
+                        },
+                    ],
+                    is_snippet: false,
                 }
             "#]],
         );
@@ -1389,8 +1453,8 @@ impl Foo {
     }
 
     #[test]
-    fn test_initializer_use_field_init_shorthand() {
-        mark::check!(test_rename_field_expr_pat);
+    fn test_rename_field_put_init_shorthand() {
+        mark::check!(test_rename_field_put_init_shorthand);
         check(
             "bar",
             r#"
@@ -1411,23 +1475,46 @@ fn foo(bar: i32) -> Foo {
     }
 
     #[test]
-    fn test_struct_field_destructure_into_shorthand() {
+    fn test_rename_local_put_init_shorthand() {
+        mark::check!(test_rename_local_put_init_shorthand);
+        check(
+            "i",
+            r#"
+struct Foo { i: i32 }
+
+fn foo(bar$0: i32) -> Foo {
+    Foo { i: bar }
+}
+"#,
+            r#"
+struct Foo { i: i32 }
+
+fn foo(i: i32) -> Foo {
+    Foo { i }
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn test_struct_field_pat_into_shorthand() {
+        mark::check!(test_rename_field_put_init_shorthand_pat);
         check(
             "baz",
             r#"
 struct Foo { i$0: i32 }
 
 fn foo(foo: Foo) {
-    let Foo { i: baz } = foo;
-    let _ = baz;
+    let Foo { i: ref baz @ qux } = foo;
+    let _ = qux;
 }
 "#,
             r#"
 struct Foo { baz: i32 }
 
 fn foo(foo: Foo) {
-    let Foo { baz } = foo;
-    let _ = baz;
+    let Foo { ref baz @ qux } = foo;
+    let _ = qux;
 }
 "#,
         );
@@ -1501,6 +1588,27 @@ fn foo(Foo { i: bar }: foo) -> i32 {
     }
 
     #[test]
+    fn test_struct_field_complex_ident_pat() {
+        check(
+            "baz",
+            r#"
+struct Foo { i$0: i32 }
+
+fn foo(foo: Foo) {
+    let Foo { ref i } = foo;
+}
+"#,
+            r#"
+struct Foo { baz: i32 }
+
+fn foo(foo: Foo) {
+    let Foo { baz: ref i } = foo;
+}
+"#,
+        );
+    }
+
+    #[test]
     fn test_rename_lifetimes() {
         mark::check!(rename_lifetime);
         check(
@@ -1607,4 +1715,38 @@ impl Foo {
 "#,
         )
     }
+
+    #[test]
+    fn test_rename_field_in_pat_in_macro_doesnt_shorthand() {
+        // ideally we would be able to make this emit a short hand, but I doubt this is easily possible
+        check(
+            "baz",
+            r#"
+macro_rules! foo {
+    ($pattern:pat) => {
+        let $pattern = loop {};
+    };
+}
+struct Foo {
+    bar$0: u32,
+}
+fn foo() {
+    foo!(Foo { bar: baz });
+}
+"#,
+            r#"
+macro_rules! foo {
+    ($pattern:pat) => {
+        let $pattern = loop {};
+    };
+}
+struct Foo {
+    baz: u32,
+}
+fn foo() {
+    foo!(Foo { baz: baz });
+}
+"#,
+        )
+    }
 }