Allow assist edit for converting structs to appear also on struct keyword and on visibility

src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_named_struct_to_tuple_struct.rs

@@ -7,7 +7,7 @@ use syntax::{
     match_ast, ted,
 };
 
-use crate::{AssistContext, AssistId, Assists, assist_context::SourceChangeBuilder};
+use crate::{AssistContext, AssistId, Assists, assist_context::SourceChangeBuilder, utils::find_struct_definition_from_cursor};
 
 // Assist: convert_named_struct_to_tuple_struct
 //
@@ -56,8 +56,7 @@ pub(crate) fn convert_named_struct_to_tuple_struct(
     // XXX: We don't currently provide this assist for struct definitions inside macros, but if we
     // are to lift this limitation, don't forget to make `edit_struct_def()` consider macro files
     // too.
-    let name = ctx.find_node_at_offset::<ast::Name>()?;
-    let strukt = name.syntax().parent().and_then(<Either<ast::Struct, ast::Variant>>::cast)?;
+    let strukt = find_struct_definition_from_cursor(ctx)?;
     let field_list = strukt.as_ref().either(|s| s.field_list(), |v| v.field_list())?;
     let record_fields = match field_list {
         ast::FieldList::RecordFieldList(it) => it,
@@ -293,6 +292,89 @@ impl A {
         );
     }
 
+    #[test]
+    fn convert_simple_struct_cursor_on_struct_keyword() {
+        check_assist(
+            convert_named_struct_to_tuple_struct,
+            r#"
+struct Inner;
+struct$0 A { inner: Inner }
+
+impl A {
+    fn new(inner: Inner) -> A {
+        A { inner }
+    }
+
+    fn new_with_default() -> A {
+        A::new(Inner)
+    }
+
+    fn into_inner(self) -> Inner {
+        self.inner
+    }
+}"#,
+            r#"
+struct Inner;
+struct A(Inner);
+
+impl A {
+    fn new(inner: Inner) -> A {
+        A(inner)
+    }
+
+    fn new_with_default() -> A {
+        A::new(Inner)
+    }
+
+    fn into_inner(self) -> Inner {
+        self.0
+    }
+}"#,
+        );
+    }
+
+    #[test]
+    fn convert_simple_struct_cursor_on_visibility_keyword() {
+        check_assist(
+            convert_named_struct_to_tuple_struct,
+            r#"
+struct Inner;
+pub$0 struct A { inner: Inner }
+
+impl A {
+    fn new(inner: Inner) -> A {
+        A { inner }
+    }
+
+    fn new_with_default() -> A {
+        A::new(Inner)
+    }
+
+    fn into_inner(self) -> Inner {
+        self.inner
+    }
+}"#,
+            r#"
+struct Inner;
+struct A(Inner);
+
+impl A {
+    fn new(inner: Inner) -> A {
+        A(inner)
+    }
+
+    fn new_with_default() -> A {
+        A::new(Inner)
+    }
+
+    fn into_inner(self) -> Inner {
+        self.0
+    }
+}"#,
+        );
+    }
+
+
     #[test]
     fn convert_struct_referenced_via_self_kw() {
         check_assist(

src/tools/rust-analyzer/crates/ide-assists/src/handlers/convert_tuple_struct_to_named_struct.rs

@@ -6,7 +6,7 @@ use syntax::{
     match_ast, ted,
 };
 
-use crate::{AssistContext, AssistId, Assists, assist_context::SourceChangeBuilder};
+use crate::{AssistContext, AssistId, Assists, assist_context::SourceChangeBuilder, utils::find_struct_definition_from_cursor};
 
 // Assist: convert_tuple_struct_to_named_struct
 //
@@ -51,8 +51,7 @@ pub(crate) fn convert_tuple_struct_to_named_struct(
     acc: &mut Assists,
     ctx: &AssistContext<'_>,
 ) -> Option<()> {
-    let name = ctx.find_node_at_offset::<ast::Name>()?;
-    let strukt = name.syntax().parent().and_then(<Either<ast::Struct, ast::Variant>>::cast)?;
+    let strukt = find_struct_definition_from_cursor(ctx)?;
     let field_list = strukt.as_ref().either(|s| s.field_list(), |v| v.field_list())?;
     let tuple_fields = match field_list {
         ast::FieldList::TupleFieldList(it) => it,
@@ -300,6 +299,88 @@ impl A {
 struct Inner;
 struct A { field1: Inner }
 
+impl A {
+    fn new(inner: Inner) -> A {
+        A { field1: inner }
+    }
+
+    fn new_with_default() -> A {
+        A::new(Inner)
+    }
+
+    fn into_inner(self) -> Inner {
+        self.field1
+    }
+}"#,
+        );
+    }
+
+    #[test]
+    fn convert_simple_struct_cursor_on_struct_keyword() {
+        check_assist(
+            convert_tuple_struct_to_named_struct,
+            r#"
+struct Inner;
+struct$0 A(Inner);
+
+impl A {
+    fn new(inner: Inner) -> A {
+        A(inner)
+    }
+
+    fn new_with_default() -> A {
+        A::new(Inner)
+    }
+
+    fn into_inner(self) -> Inner {
+        self.0
+    }
+}"#,
+            r#"
+struct Inner;
+struct A { field1: Inner }
+
+impl A {
+    fn new(inner: Inner) -> A {
+        A { field1: inner }
+    }
+
+    fn new_with_default() -> A {
+        A::new(Inner)
+    }
+
+    fn into_inner(self) -> Inner {
+        self.field1
+    }
+}"#,
+        );
+    }
+
+        #[test]
+    fn convert_simple_struct_cursor_on_visibility_keyword() {
+        check_assist(
+            convert_tuple_struct_to_named_struct,
+            r#"
+struct Inner;
+pub$0 struct A(Inner);
+
+impl A {
+    fn new(inner: Inner) -> A {
+        A(inner)
+    }
+
+    fn new_with_default() -> A {
+        A::new(Inner)
+    }
+
+    fn into_inner(self) -> Inner {
+        self.0
+    }
+}"#,
+            r#"
+struct Inner;
+pub struct A { field1: Inner }
+
 impl A {
     fn new(inner: Inner) -> A {
         A { field1: inner }

src/tools/rust-analyzer/crates/ide-assists/src/utils.rs

@@ -1,5 +1,7 @@
 //! Assorted functions shared by several assists.
 
+use either::Either;
+
 pub(crate) use gen_trait_fn_body::gen_trait_fn_body;
 use hir::{
     DisplayTarget, HasAttrs as HirHasAttrs, HirDisplay, InFile, ModuleDef, PathResolution,
@@ -1146,3 +1148,24 @@ pub fn is_body_const(sema: &Semantics<'_, RootDatabase>, expr: &ast::Expr) -> bo
     });
     is_const
 }
+
+/// Gets the struct definition from a context
+pub(crate) fn find_struct_definition_from_cursor(ctx: &AssistContext<'_>)
+-> Option<Either<ast::Struct, ast::Variant>>
+{
+    ctx.find_node_at_offset::<ast::Name>().and_then(|name| name.syntax().parent())
+        .or(find_struct_keyword(ctx).and_then(|kw| kw.parent()))
+        .or(ctx.find_node_at_offset::<ast::Visibility>().and_then(|visibility| visibility.syntax().parent()))
+        .and_then(<Either<ast::Struct, ast::Variant>>::cast)
+}
+
+fn find_struct_keyword(ctx: &AssistContext<'_>) -> Option<SyntaxToken> {
+    // Attempt to find the token at the current cursor offset
+    ctx
+    .token_at_offset()
+    .find(|leaf| match leaf.kind() {
+        STRUCT_KW => true,
+        _ => false,
+    })
+}
+