From 8d4be829e09dae4af7b4a82b379fdb8700b0929f Mon Sep 17 00:00:00 2001 From: unexge Date: Sun, 4 Apr 2021 00:04:31 +0300 Subject: Add convert tuple struct to named struct assist --- .../convert_tuple_struct_to_named_struct.rs | 345 +++++++++++++++++++++ 1 file changed, 345 insertions(+) create mode 100644 crates/ide_assists/src/handlers/convert_tuple_struct_to_named_struct.rs (limited to 'crates/ide_assists/src/handlers') diff --git a/crates/ide_assists/src/handlers/convert_tuple_struct_to_named_struct.rs b/crates/ide_assists/src/handlers/convert_tuple_struct_to_named_struct.rs new file mode 100644 index 000000000..b2f7be011 --- /dev/null +++ b/crates/ide_assists/src/handlers/convert_tuple_struct_to_named_struct.rs @@ -0,0 +1,345 @@ +use hir::{Adt, ModuleDef}; +use ide_db::defs::Definition; +use syntax::{ + ast::{self, AstNode, GenericParamsOwner, VisibilityOwner}, + match_ast, +}; + +use crate::{assist_context::AssistBuilder, AssistContext, AssistId, AssistKind, Assists}; + +// Assist: convert_tuple_struct_to_named_struct +// +// Converts tuple struct to struct with named fields. +// +// ``` +// struct Inner; +// struct A$0(Inner); +// ``` +// -> +// ``` +// struct Inner; +// struct A { field1: Inner } +// ``` +pub(crate) fn convert_tuple_struct_to_named_struct( + acc: &mut Assists, + ctx: &AssistContext, +) -> Option<()> { + let strukt = ctx.find_node_at_offset::()?; + let tuple_fields = match strukt.field_list()? { + ast::FieldList::TupleFieldList(it) => it, + ast::FieldList::RecordFieldList(_) => return None, + }; + + let target = strukt.syntax().text_range(); + acc.add( + AssistId("convert_tuple_struct_to_named_struct", AssistKind::RefactorRewrite), + "Convert to named struct", + target, + |edit| { + let names = generate_names(tuple_fields.fields()); + edit_field_references(ctx, edit, tuple_fields.fields(), &names); + edit_struct_references(ctx, edit, &strukt, &names); + edit_struct_def(ctx, edit, &strukt, tuple_fields, names); + }, + ) +} + +fn edit_struct_def( + ctx: &AssistContext, + edit: &mut AssistBuilder, + strukt: &ast::Struct, + tuple_fields: ast::TupleFieldList, + names: Vec, +) { + let record_fields = tuple_fields + .fields() + .zip(names) + .map(|(f, name)| ast::make::record_field(f.visibility(), name, f.ty().unwrap())); + let record_fields = ast::make::record_field_list(record_fields); + let tuple_fields_text_range = tuple_fields.syntax().text_range(); + + edit.edit_file(ctx.frange.file_id); + + if let Some(w) = strukt.where_clause() { + edit.delete(w.syntax().text_range()); + edit.insert(tuple_fields_text_range.start(), ast::make::tokens::single_newline().text()); + edit.insert(tuple_fields_text_range.start(), w.syntax().text()); + edit.insert(tuple_fields_text_range.start(), ","); + edit.insert(tuple_fields_text_range.start(), ast::make::tokens::single_newline().text()); + } else { + edit.insert(tuple_fields_text_range.start(), ast::make::tokens::single_space().text()); + } + + edit.replace(tuple_fields_text_range, record_fields.to_string()); + strukt.semicolon_token().map(|t| edit.delete(t.text_range())); +} + +fn edit_struct_references( + ctx: &AssistContext, + edit: &mut AssistBuilder, + strukt: &ast::Struct, + names: &[ast::Name], +) { + let strukt_def = ctx.sema.to_def(strukt).unwrap(); + let usages = Definition::ModuleDef(ModuleDef::Adt(Adt::Struct(strukt_def))) + .usages(&ctx.sema) + .include_self_kw_refs(true) + .all(); + + for (file_id, refs) in usages { + edit.edit_file(file_id); + for r in refs { + for node in r.name.syntax().ancestors() { + match_ast! { + match node { + ast::TupleStructPat(tuple_struct_pat) => { + edit.replace( + tuple_struct_pat.syntax().text_range(), + ast::make::record_pat_with_fields( + tuple_struct_pat.path().unwrap(), + ast::make::record_pat_field_list(tuple_struct_pat.fields().zip(names).map( + |(pat, name)| { + ast::make::record_pat_field( + ast::make::name_ref(&name.to_string()), + pat, + ) + }, + )), + ) + .to_string(), + ); + }, + // for tuple struct creations like: Foo(42) + ast::CallExpr(call_expr) => { + let path = call_expr.syntax().descendants().find_map(ast::PathExpr::cast).unwrap(); + let arg_list = + call_expr.syntax().descendants().find_map(ast::ArgList::cast).unwrap(); + + edit.replace( + call_expr.syntax().text_range(), + ast::make::record_expr( + path.path().unwrap(), + ast::make::record_expr_field_list(arg_list.args().zip(names).map( + |(expr, name)| { + ast::make::record_expr_field( + ast::make::name_ref(&name.to_string()), + Some(expr), + ) + }, + )), + ) + .to_string(), + ); + }, + _ => () + } + } + } + } + } +} + +fn edit_field_references( + ctx: &AssistContext, + edit: &mut AssistBuilder, + fields: impl Iterator, + names: &[ast::Name], +) { + for (field, name) in fields.zip(names) { + let field = match ctx.sema.to_def(&field) { + Some(it) => it, + None => continue, + }; + let def = Definition::Field(field); + let usages = def.usages(&ctx.sema).all(); + for (file_id, refs) in usages { + edit.edit_file(file_id); + for r in refs { + if let Some(name_ref) = r.name.as_name_ref() { + edit.replace(name_ref.syntax().text_range(), name.text()); + } + } + } + } +} + +fn generate_names(fields: impl Iterator) -> Vec { + fields.enumerate().map(|(i, _)| ast::make::name(&format!("field{}", i + 1))).collect() +} + +#[cfg(test)] +mod tests { + use crate::tests::{check_assist, check_assist_not_applicable}; + + use super::*; + + #[test] + fn not_applicable_other_than_tuple_struct() { + check_assist_not_applicable( + convert_tuple_struct_to_named_struct, + r#"struct Foo$0 { bar: u32 };"#, + ); + check_assist_not_applicable(convert_tuple_struct_to_named_struct, r#"struct Foo$0;"#); + } + + #[test] + fn convert_simple_struct() { + check_assist( + convert_tuple_struct_to_named_struct, + r#" +struct Inner; +struct A$0(Inner); + +impl A { + fn new() -> A { + A(Inner) + } + + fn into_inner(self) -> Inner { + self.0 + } +}"#, + r#" +struct Inner; +struct A { field1: Inner } + +impl A { + fn new() -> A { + A { field1: Inner } + } + + fn into_inner(self) -> Inner { + self.field1 + } +}"#, + ); + } + + #[test] + fn convert_struct_referenced_via_self_kw() { + check_assist( + convert_tuple_struct_to_named_struct, + r#" +struct Inner; +struct A$0(Inner); + +impl A { + fn new() -> Self { + Self(Inner) + } + + fn into_inner(self) -> Inner { + self.0 + } +}"#, + r#" +struct Inner; +struct A { field1: Inner } + +impl A { + fn new() -> Self { + Self { field1: Inner } + } + + fn into_inner(self) -> Inner { + self.field1 + } +}"#, + ); + } + + #[test] + fn convert_destructured_struct() { + check_assist( + convert_tuple_struct_to_named_struct, + r#" +struct Inner; +struct A$0(Inner); + +impl A { + fn into_inner(self) -> Inner { + let A(first) = self; + first + } + + fn into_inner_via_self(self) -> Inner { + let Self(first) = self; + first + } +}"#, + r#" +struct Inner; +struct A { field1: Inner } + +impl A { + fn into_inner(self) -> Inner { + let A { field1: first } = self; + first + } + + fn into_inner_via_self(self) -> Inner { + let Self { field1: first } = self; + first + } +}"#, + ); + } + + #[test] + fn convert_struct_with_visibility() { + check_assist( + convert_tuple_struct_to_named_struct, + r#" +struct A$0(pub u32, pub(crate) u64); + +impl A { + fn new() -> A { + A(42, 42) + } + + fn into_first(self) -> u32 { + self.0 + } + + fn into_second(self) -> u64 { + self.1 + } +}"#, + r#" +struct A { pub field1: u32, pub(crate) field2: u64 } + +impl A { + fn new() -> A { + A { field1: 42, field2: 42 } + } + + fn into_first(self) -> u32 { + self.field1 + } + + fn into_second(self) -> u64 { + self.field2 + } +}"#, + ); + } + + #[test] + fn convert_struct_with_where_clause() { + check_assist( + convert_tuple_struct_to_named_struct, + r#" +struct Wrap$0(T) +where + T: Display; +"#, + r#" +struct Wrap +where + T: Display, +{ field1: T } + +"#, + ); + } +} -- cgit v1.2.3