1 //! `assists` crate provides a bunch of code assists, also known as code
2 //! actions (in LSP) or intentions (in IntelliJ).
4 //! An assist is a micro-refactoring, which is automatically activated in
5 //! certain context. For example, if the cursor is over `,`, a "swap `,`" assist
9 macro_rules! eprintln {
10 ($($tt:tt)*) => { stdx::eprintln!($($tt)*) };
18 pub mod ast_transform;
21 use ide_db::base_db::FileRange;
22 use ide_db::{label::Label, source_change::SourceChange, RootDatabase};
23 use syntax::TextRange;
25 pub(crate) use crate::assist_context::{AssistContext, Assists};
27 pub use assist_config::AssistConfig;
29 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
41 pub fn contains(self, other: AssistKind) -> bool {
47 AssistKind::None | AssistKind::Generate => return true,
48 AssistKind::Refactor => match other {
49 AssistKind::RefactorExtract
50 | AssistKind::RefactorInline
51 | AssistKind::RefactorRewrite => return true,
59 /// Unique identifier of the assist, should not be shown to the user
61 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
62 pub struct AssistId(pub &'static str, pub AssistKind);
64 #[derive(Clone, Debug)]
65 pub struct GroupLabel(pub String);
67 #[derive(Debug, Clone)]
70 /// Short description of the assist, as shown in the UI.
72 pub group: Option<GroupLabel>,
73 /// Target ranges are used to sort assists: the smaller the target range,
74 /// the more specific assist is, and so it should be sorted first.
75 pub target: TextRange,
76 /// Computing source change sometimes is much more costly then computing the
77 /// other fields. Additionally, the actual change is not required to show
78 /// the lightbulb UI, it only is needed when the user tries to apply an
79 /// assist. So, we compute it lazily: the API allow requesting assists with
80 /// or without source change. We could (and in fact, used to) distinguish
81 /// between resolved and unresolved assists at the type level, but this is
82 /// cumbersome, especially if you want to embed an assist into another data
83 /// structure, such as a diagnostic.
84 pub source_change: Option<SourceChange>,
88 /// Return all the assists applicable at the given position.
91 config: &AssistConfig,
95 let sema = Semantics::new(db);
96 let ctx = AssistContext::new(sema, config, range);
97 let mut acc = Assists::new(&ctx, resolve);
98 handlers::all().iter().for_each(|handler| {
99 handler(&mut acc, &ctx);
106 use crate::{AssistContext, Assists};
108 pub(crate) type Handler = fn(&mut Assists, &AssistContext) -> Option<()>;
110 mod add_explicit_type;
111 mod add_lifetime_to_type;
112 mod add_missing_impl_members;
116 mod change_visibility;
117 mod convert_for_to_iter_for_each;
118 mod convert_integer_literal;
120 mod expand_glob_import;
121 mod extract_function;
122 mod extract_struct_from_enum_variant;
123 mod extract_variable;
128 mod flip_trait_bound;
129 mod generate_default_from_enum_variant;
131 mod generate_enum_is_method;
132 mod generate_enum_projection_method;
133 mod generate_from_impl_for_enum;
134 mod generate_function;
136 mod generate_getter_mut;
140 mod infer_function_return_type;
142 mod inline_local_variable;
143 mod introduce_named_lifetime;
146 mod merge_match_arms;
149 mod move_module_to_file;
150 mod pull_assignment_up;
155 mod remove_unused_param;
158 mod replace_derive_with_manual_impl;
159 mod replace_if_let_with_match;
160 mod replace_impl_trait_with_generic;
161 mod replace_let_with_if_let;
162 mod replace_qualified_name_with_use;
163 mod replace_string_with_char;
164 mod replace_unwrap_with_match;
169 mod wrap_return_type_in_result;
171 pub(crate) fn all() -> &'static [Handler] {
173 // These are alphabetic for the foolish consistency
174 add_explicit_type::add_explicit_type,
175 add_lifetime_to_type::add_lifetime_to_type,
176 add_turbo_fish::add_turbo_fish,
177 apply_demorgan::apply_demorgan,
178 auto_import::auto_import,
179 change_visibility::change_visibility,
180 convert_for_to_iter_for_each::convert_for_to_iter_for_each,
181 convert_integer_literal::convert_integer_literal,
182 early_return::convert_to_guarded_return,
183 expand_glob_import::expand_glob_import,
184 move_module_to_file::move_module_to_file,
185 extract_struct_from_enum_variant::extract_struct_from_enum_variant,
186 fill_match_arms::fill_match_arms,
187 fix_visibility::fix_visibility,
188 flip_binexpr::flip_binexpr,
189 flip_comma::flip_comma,
190 flip_trait_bound::flip_trait_bound,
191 generate_default_from_enum_variant::generate_default_from_enum_variant,
192 generate_derive::generate_derive,
193 generate_enum_is_method::generate_enum_is_method,
194 generate_enum_projection_method::generate_enum_try_into_method,
195 generate_enum_projection_method::generate_enum_as_method,
196 generate_from_impl_for_enum::generate_from_impl_for_enum,
197 generate_function::generate_function,
198 generate_getter::generate_getter,
199 generate_getter_mut::generate_getter_mut,
200 generate_impl::generate_impl,
201 generate_new::generate_new,
202 generate_setter::generate_setter,
203 infer_function_return_type::infer_function_return_type,
204 inline_function::inline_function,
205 inline_local_variable::inline_local_variable,
206 introduce_named_lifetime::introduce_named_lifetime,
207 invert_if::invert_if,
208 merge_imports::merge_imports,
209 merge_match_arms::merge_match_arms,
210 move_bounds::move_bounds_to_where_clause,
211 move_guard::move_arm_cond_to_match_guard,
212 move_guard::move_guard_to_arm_body,
213 pull_assignment_up::pull_assignment_up,
214 qualify_path::qualify_path,
215 raw_string::add_hash,
216 raw_string::make_usual_string,
217 raw_string::remove_hash,
218 remove_dbg::remove_dbg,
219 remove_mut::remove_mut,
220 remove_unused_param::remove_unused_param,
221 reorder_fields::reorder_fields,
222 reorder_impl::reorder_impl,
223 replace_derive_with_manual_impl::replace_derive_with_manual_impl,
224 replace_if_let_with_match::replace_if_let_with_match,
225 replace_if_let_with_match::replace_match_with_if_let,
226 replace_impl_trait_with_generic::replace_impl_trait_with_generic,
227 replace_let_with_if_let::replace_let_with_if_let,
228 replace_qualified_name_with_use::replace_qualified_name_with_use,
229 replace_unwrap_with_match::replace_unwrap_with_match,
230 split_import::split_import,
231 toggle_ignore::toggle_ignore,
232 unmerge_use::unmerge_use,
233 unwrap_block::unwrap_block,
234 wrap_return_type_in_result::wrap_return_type_in_result,
235 // These are manually sorted for better priorities. By default,
236 // priority is determined by the size of the target range (smaller
237 // target wins). If the ranges are equal, position in this list is
238 // used as a tie-breaker.
239 add_missing_impl_members::add_missing_impl_members,
240 add_missing_impl_members::add_missing_default_members,
242 replace_string_with_char::replace_string_with_char,
243 raw_string::make_raw_string,
245 extract_variable::extract_variable,
246 extract_function::extract_function,
247 // Are you sure you want to add new assist here, and not to the
248 // sorted list above?