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;
10 pub(crate) mod pattern;
11 pub(crate) mod postfix;
12 pub(crate) mod qualified_path;
13 pub(crate) mod record;
14 pub(crate) mod snippet;
15 pub(crate) mod trait_impl;
16 pub(crate) mod unqualified_path;
21 use ide_db::SymbolKind;
24 item::{Builder, CompletionKind},
27 enum_variant::render_variant,
28 function::{render_fn, render_method},
30 pattern::{render_struct_pat, render_variant_pat},
31 render_field, render_resolution, render_tuple_field,
32 type_alias::{render_type_alias, render_type_alias_with_eq},
35 CompletionContext, CompletionItem, CompletionItemKind,
38 /// Represents an in-progress set of completions being built.
39 #[derive(Debug, Default)]
40 pub struct Completions {
41 buf: Vec<CompletionItem>,
44 impl From<Completions> for Vec<CompletionItem> {
45 fn from(val: Completions) -> Self {
51 /// Convenience method, which allows to add a freshly created completion into accumulator
52 /// without binding it to the variable.
53 pub(crate) fn add_to(self, acc: &mut Completions) {
59 fn add(&mut self, item: CompletionItem) {
63 fn add_opt(&mut self, item: Option<CompletionItem>) {
64 if let Some(item) = item {
69 pub(crate) fn add_all<I>(&mut self, items: I)
72 I::Item: Into<CompletionItem>,
74 items.into_iter().for_each(|item| self.add(item.into()))
77 pub(crate) fn add_resolution(
79 ctx: &CompletionContext,
80 local_name: hir::Name,
81 resolution: &hir::ScopeDef,
83 self.add_opt(render_resolution(RenderContext::new(ctx), local_name, resolution));
86 pub(crate) fn add_macro(
88 ctx: &CompletionContext,
89 name: Option<hir::Name>,
90 macro_: hir::MacroDef,
92 let name = match name {
96 self.add_opt(render_macro(RenderContext::new(ctx), None, name, macro_));
99 pub(crate) fn add_function(
101 ctx: &CompletionContext,
103 local_name: Option<hir::Name>,
105 self.add_opt(render_fn(RenderContext::new(ctx), None, local_name, func));
108 pub(crate) fn add_method(
110 ctx: &CompletionContext,
112 receiver: Option<hir::Name>,
113 local_name: Option<hir::Name>,
115 self.add_opt(render_method(RenderContext::new(ctx), None, receiver, local_name, func));
118 pub(crate) fn add_const(&mut self, ctx: &CompletionContext, constant: hir::Const) {
119 self.add_opt(render_const(RenderContext::new(ctx), constant));
122 pub(crate) fn add_type_alias(&mut self, ctx: &CompletionContext, type_alias: hir::TypeAlias) {
123 self.add_opt(render_type_alias(RenderContext::new(ctx), type_alias));
126 pub(crate) fn add_type_alias_with_eq(
128 ctx: &CompletionContext,
129 type_alias: hir::TypeAlias,
131 self.add_opt(render_type_alias_with_eq(RenderContext::new(ctx), type_alias));
134 pub(crate) fn add_qualified_enum_variant(
136 ctx: &CompletionContext,
137 variant: hir::Variant,
140 let item = render_variant(RenderContext::new(ctx), None, None, variant, Some(path));
144 pub(crate) fn add_enum_variant(
146 ctx: &CompletionContext,
147 variant: hir::Variant,
148 local_name: Option<hir::Name>,
150 let item = render_variant(RenderContext::new(ctx), None, local_name, variant, None);
154 pub(crate) fn add_field(
156 ctx: &CompletionContext,
157 receiver: Option<hir::Name>,
161 let item = render_field(RenderContext::new(ctx), receiver, field, ty);
165 pub(crate) fn add_tuple_field(
167 ctx: &CompletionContext,
168 receiver: Option<hir::Name>,
172 let item = render_tuple_field(RenderContext::new(ctx), receiver, field, ty);
176 pub(crate) fn add_static_lifetime(&mut self, ctx: &CompletionContext) {
178 CompletionItem::new(CompletionKind::Reference, ctx.source_range(), "'static");
179 item.kind(CompletionItemKind::SymbolKind(SymbolKind::LifetimeParam));
180 self.add(item.build());
183 pub(crate) fn add_variant_pat(
185 ctx: &CompletionContext,
186 variant: hir::Variant,
187 local_name: Option<hir::Name>,
189 self.add_opt(render_variant_pat(RenderContext::new(ctx), variant, local_name, None));
192 pub(crate) fn add_qualified_variant_pat(
194 ctx: &CompletionContext,
195 variant: hir::Variant,
198 self.add_opt(render_variant_pat(RenderContext::new(ctx), variant, None, Some(path)));
201 pub(crate) fn add_struct_pat(
203 ctx: &CompletionContext,
205 local_name: Option<hir::Name>,
207 self.add_opt(render_struct_pat(RenderContext::new(ctx), strukt, local_name));
211 /// Calls the callback for each variant of the provided enum with the path to the variant.
212 /// Skips variants that are visible with single segment paths.
213 fn enum_variants_with_paths(
214 acc: &mut Completions,
215 ctx: &CompletionContext,
217 cb: impl Fn(&mut Completions, &CompletionContext, hir::Variant, hir::ModPath),
219 let variants = enum_.variants(ctx.db);
221 let module = if let Some(module) = ctx.scope.module() {
222 // Compute path from the completion site if available.
225 // Otherwise fall back to the enum's definition site.
229 if let Some(impl_) = ctx.impl_def.as_ref().and_then(|impl_| ctx.sema.to_def(impl_)) {
230 if impl_.self_ty(ctx.db).as_adt() == Some(hir::Adt::Enum(enum_)) {
231 for &variant in &variants {
232 let self_path = hir::ModPath::from_segments(
233 hir::PathKind::Plain,
234 iter::once(known::SELF_TYPE).chain(iter::once(variant.name(ctx.db))),
236 cb(acc, ctx, variant, self_path);
241 for variant in variants {
242 if let Some(path) = module.find_use_path(ctx.db, hir::ModuleDef::from(variant)) {
243 // Variants with trivial paths are already added by the existing completion logic,
244 // so we should avoid adding these twice
245 if path.segments().len() > 1 {
246 cb(acc, ctx, variant, path);