1 //! This module defines an accumulator for completions which are going to be presented to user.
3 pub(crate) mod attribute;
5 pub(crate) mod flyimport;
6 pub(crate) mod fn_param;
7 pub(crate) mod keyword;
8 pub(crate) mod lifetime;
9 pub(crate) mod macro_in_item_position;
11 pub(crate) mod pattern;
12 pub(crate) mod postfix;
13 pub(crate) mod qualified_path;
14 pub(crate) mod record;
15 pub(crate) mod snippet;
16 pub(crate) mod trait_impl;
17 pub(crate) mod unqualified_path;
22 use hir::{known, HasVisibility};
23 use ide_db::SymbolKind;
24 use rustc_hash::FxHashSet;
27 item::{Builder, CompletionKind},
30 enum_variant::render_variant,
31 function::{render_fn, render_method},
33 pattern::{render_struct_pat, render_variant_pat},
34 render_field, render_resolution, render_tuple_field,
35 type_alias::render_type_alias,
38 CompletionContext, CompletionItem, CompletionItemKind,
41 /// Represents an in-progress set of completions being built.
42 #[derive(Debug, Default)]
43 pub struct Completions {
44 buf: Vec<CompletionItem>,
47 impl Into<Vec<CompletionItem>> for Completions {
48 fn into(self) -> Vec<CompletionItem> {
54 /// Convenience method, which allows to add a freshly created completion into accumulator
55 /// without binding it to the variable.
56 pub(crate) fn add_to(self, acc: &mut Completions) {
62 pub(crate) fn add(&mut self, item: CompletionItem) {
66 pub(crate) fn add_all<I>(&mut self, items: I)
69 I::Item: Into<CompletionItem>,
71 items.into_iter().for_each(|item| self.add(item.into()))
74 pub(crate) fn add_field(
76 ctx: &CompletionContext,
77 receiver: Option<hir::Name>,
81 let item = render_field(RenderContext::new(ctx), receiver, field, ty);
85 pub(crate) fn add_tuple_field(
87 ctx: &CompletionContext,
88 receiver: Option<hir::Name>,
92 let item = render_tuple_field(RenderContext::new(ctx), receiver, field, ty);
96 pub(crate) fn add_static_lifetime(&mut self, ctx: &CompletionContext) {
98 CompletionItem::new(CompletionKind::Reference, ctx.source_range(), "'static");
99 item.kind(CompletionItemKind::SymbolKind(SymbolKind::LifetimeParam));
100 self.add(item.build());
103 pub(crate) fn add_resolution(
105 ctx: &CompletionContext,
106 local_name: hir::Name,
107 resolution: &hir::ScopeDef,
109 if let Some(item) = render_resolution(RenderContext::new(ctx), local_name, resolution) {
114 pub(crate) fn add_macro(
116 ctx: &CompletionContext,
117 name: Option<hir::Name>,
118 macro_: hir::MacroDef,
120 let name = match name {
124 if let Some(item) = render_macro(RenderContext::new(ctx), None, name, macro_) {
129 pub(crate) fn add_function(
131 ctx: &CompletionContext,
133 local_name: Option<hir::Name>,
135 if let Some(item) = render_fn(RenderContext::new(ctx), None, local_name, func) {
140 pub(crate) fn add_method(
142 ctx: &CompletionContext,
144 receiver: Option<hir::Name>,
145 local_name: Option<hir::Name>,
147 if let Some(item) = render_method(RenderContext::new(ctx), None, receiver, local_name, func)
153 pub(crate) fn add_variant_pat(
155 ctx: &CompletionContext,
156 variant: hir::Variant,
157 local_name: Option<hir::Name>,
159 if let Some(item) = render_variant_pat(RenderContext::new(ctx), variant, local_name, None) {
164 pub(crate) fn add_qualified_variant_pat(
166 ctx: &CompletionContext,
167 variant: hir::Variant,
170 if let Some(item) = render_variant_pat(RenderContext::new(ctx), variant, None, Some(path)) {
175 pub(crate) fn add_struct_pat(
177 ctx: &CompletionContext,
179 local_name: Option<hir::Name>,
181 if let Some(item) = render_struct_pat(RenderContext::new(ctx), strukt, local_name) {
186 pub(crate) fn add_const(&mut self, ctx: &CompletionContext, constant: hir::Const) {
187 if let Some(item) = render_const(RenderContext::new(ctx), constant) {
192 pub(crate) fn add_type_alias(&mut self, ctx: &CompletionContext, type_alias: hir::TypeAlias) {
193 if let Some(item) = render_type_alias(RenderContext::new(ctx), type_alias) {
198 pub(crate) fn add_qualified_enum_variant(
200 ctx: &CompletionContext,
201 variant: hir::Variant,
204 let item = render_variant(RenderContext::new(ctx), None, None, variant, Some(path));
208 pub(crate) fn add_enum_variant(
210 ctx: &CompletionContext,
211 variant: hir::Variant,
212 local_name: Option<hir::Name>,
214 let item = render_variant(RenderContext::new(ctx), None, local_name, variant, None);
219 fn complete_enum_variants(
220 acc: &mut Completions,
221 ctx: &CompletionContext,
222 enum_data: hir::Enum,
223 cb: impl Fn(&mut Completions, &CompletionContext, hir::Variant, hir::ModPath),
225 let variants = enum_data.variants(ctx.db);
227 let module = if let Some(module) = ctx.scope.module() {
228 // Compute path from the completion site if available.
231 // Otherwise fall back to the enum's definition site.
232 enum_data.module(ctx.db)
235 if let Some(impl_) = ctx.impl_def.as_ref().and_then(|impl_| ctx.sema.to_def(impl_)) {
236 if impl_.self_ty(ctx.db).as_adt() == Some(hir::Adt::Enum(enum_data)) {
237 for &variant in &variants {
238 let self_path = hir::ModPath::from_segments(
239 hir::PathKind::Plain,
240 iter::once(known::SELF_TYPE).chain(iter::once(variant.name(ctx.db))),
242 cb(acc, ctx, variant, self_path);
247 for variant in variants {
248 if let Some(path) = module.find_use_path(ctx.db, hir::ModuleDef::from(variant)) {
249 // Variants with trivial paths are already added by the existing completion logic,
250 // so we should avoid adding these twice
251 if path.segments().len() > 1 {
252 cb(acc, ctx, variant, path);
259 ctx: &CompletionContext,
260 receiver: &hir::Type,
261 mut f: impl FnMut(Either<hir::Field, usize>, hir::Type),
263 for receiver in receiver.autoderef(ctx.db) {
264 for (field, ty) in receiver.fields(ctx.db) {
265 if ctx.scope.module().map_or(false, |m| !field.is_visible_from(ctx.db, m)) {
266 // Skip private field. FIXME: If the definition location of the
267 // field is editable, we should show the completion
270 f(Either::Left(field), ty);
272 for (i, ty) in receiver.tuple_fields(ctx.db).into_iter().enumerate() {
273 // FIXME: Handle visibility
274 f(Either::Right(i), ty);
280 ctx: &CompletionContext,
281 receiver: &hir::Type,
282 mut f: impl FnMut(hir::Function),
284 if let Some(krate) = ctx.krate {
285 let mut seen_methods = FxHashSet::default();
286 let traits_in_scope = ctx.scope.traits_in_scope();
287 receiver.iterate_method_candidates(ctx.db, krate, &traits_in_scope, None, |_ty, func| {
288 if func.self_param(ctx.db).is_some()
289 && ctx.scope.module().map_or(true, |m| func.is_visible_from(ctx.db, m))
290 && seen_methods.insert(func.name(ctx.db))