1 use stdx::{format_to, to_lower_snake_case};
2 use syntax::ast::{self, AstNode, NameOwner, VisibilityOwner};
5 utils::{find_impl_block_end, find_struct_impl, generate_impl_text},
6 AssistContext, AssistId, AssistKind, Assists, GroupLabel,
9 // Assist: generate_getter
11 // Generate a getter method.
25 // /// Get a reference to the person's name.
26 // fn $0name(&self) -> &String {
31 pub(crate) fn generate_getter(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
32 generate_getter_impl(acc, ctx, false)
35 // Assist: generate_getter_mut
37 // Generate a mut getter method.
51 // /// Get a mutable reference to the person's name.
52 // fn $0name_mut(&mut self) -> &mut String {
57 pub(crate) fn generate_getter_mut(acc: &mut Assists, ctx: &AssistContext) -> Option<()> {
58 generate_getter_impl(acc, ctx, true)
61 pub(crate) fn generate_getter_impl(
66 let strukt = ctx.find_node_at_offset::<ast::Struct>()?;
67 let field = ctx.find_node_at_offset::<ast::RecordField>()?;
69 let strukt_name = strukt.name()?;
70 let field_name = field.name()?;
71 let field_ty = field.ty()?;
73 // Return early if we've found an existing fn
74 let mut fn_name = to_lower_snake_case(&field_name.to_string());
76 format_to!(fn_name, "_mut");
78 let impl_def = find_struct_impl(&ctx, &ast::Adt::Struct(strukt.clone()), fn_name.as_str())?;
80 let (id, label) = if mutable {
81 ("generate_getter_mut", "Generate a mut getter method")
83 ("generate_getter", "Generate a getter method")
85 let target = field.syntax().text_range();
87 &GroupLabel("Generate getter/setter".to_owned()),
88 AssistId(id, AssistKind::Generate),
92 let mut buf = String::with_capacity(512);
94 if impl_def.is_some() {
98 let vis = strukt.visibility().map_or(String::new(), |v| format!("{} ", v));
101 " /// Get a {}reference to the {}'s {}.
102 {}fn {}(&{mut_}self) -> &{mut_}{} {{
105 mutable.then(|| "mutable ").unwrap_or_default(),
106 to_lower_snake_case(&strukt_name.to_string()).replace('_', " "),
107 fn_name.trim_end_matches("_mut").replace('_', " "),
112 mut_ = mutable.then(|| "mut ").unwrap_or_default(),
115 let start_offset = impl_def
116 .and_then(|impl_def| find_impl_block_end(impl_def, &mut buf))
118 buf = generate_impl_text(&ast::Adt::Struct(strukt.clone()), &buf);
119 strukt.syntax().text_range().end()
122 match ctx.config.snippet_cap {
124 builder.insert_snippet(cap, start_offset, buf.replacen("fn ", "fn $0", 1))
126 None => builder.insert(start_offset, buf),
134 use crate::tests::{check_assist, check_assist_not_applicable};
139 fn test_generate_getter_from_field() {
153 /// Get a reference to the context's data.
154 fn $0data(&self) -> &Data {
174 /// Get a mutable reference to the context's data.
175 fn $0data_mut(&mut self) -> &mut Data {
184 fn test_generate_getter_already_implemented() {
185 check_assist_not_applicable(
193 fn data(&self) -> &Data {
200 check_assist_not_applicable(
208 fn data_mut(&mut self) -> &mut Data {
217 fn test_generate_getter_from_field_with_visibility_marker() {
221 pub(crate) struct Context {
226 pub(crate) struct Context {
231 /// Get a reference to the context's data.
232 pub(crate) fn $0data(&self) -> &Data {
241 fn test_multiple_generate_getter() {
251 /// Get a reference to the context's data.
252 fn data(&self) -> &Data {
264 /// Get a reference to the context's data.
265 fn data(&self) -> &Data {
269 /// Get a reference to the context's count.
270 fn $0count(&self) -> &usize {