rename completion -> ide_completion

We don't have completion-related PRs in flight, so lets do it

crates/ide_completion/src/render.rs

@@ -0,0 +1,945 @@
+//! `render` module provides utilities for rendering completion suggestions
+//! into code pieces that will be presented to user.
+
+pub(crate) mod macro_;
+pub(crate) mod function;
+pub(crate) mod enum_variant;
+pub(crate) mod const_;
+pub(crate) mod pattern;
+pub(crate) mod type_alias;
+
+mod builder_ext;
+
+use hir::{
+    AsAssocItem, Documentation, HasAttrs, HirDisplay, ModuleDef, Mutability, ScopeDef, Type,
+};
+use ide_db::{helpers::SnippetCap, RootDatabase, SymbolKind};
+use syntax::TextRange;
+use test_utils::mark;
+
+use crate::{
+    item::ImportEdit, CompletionContext, CompletionItem, CompletionItemKind, CompletionKind,
+    CompletionScore,
+};
+
+use crate::render::{enum_variant::render_variant, function::render_fn, macro_::render_macro};
+
+pub(crate) fn render_field<'a>(
+    ctx: RenderContext<'a>,
+    field: hir::Field,
+    ty: &Type,
+) -> CompletionItem {
+    Render::new(ctx).add_field(field, ty)
+}
+
+pub(crate) fn render_tuple_field<'a>(
+    ctx: RenderContext<'a>,
+    field: usize,
+    ty: &Type,
+) -> CompletionItem {
+    Render::new(ctx).add_tuple_field(field, ty)
+}
+
+pub(crate) fn render_resolution<'a>(
+    ctx: RenderContext<'a>,
+    local_name: String,
+    resolution: &ScopeDef,
+) -> Option<CompletionItem> {
+    Render::new(ctx).render_resolution(local_name, None, resolution)
+}
+
+pub(crate) fn render_resolution_with_import<'a>(
+    ctx: RenderContext<'a>,
+    import_edit: ImportEdit,
+    resolution: &ScopeDef,
+) -> Option<CompletionItem> {
+    let local_name = match resolution {
+        ScopeDef::ModuleDef(ModuleDef::Function(f)) => f.name(ctx.completion.db).to_string(),
+        ScopeDef::ModuleDef(ModuleDef::Const(c)) => c.name(ctx.completion.db)?.to_string(),
+        ScopeDef::ModuleDef(ModuleDef::TypeAlias(t)) => t.name(ctx.completion.db).to_string(),
+        _ => import_edit.import_path.segments().last()?.to_string(),
+    };
+    Render::new(ctx).render_resolution(local_name, Some(import_edit), resolution).map(|mut item| {
+        item.completion_kind = CompletionKind::Magic;
+        item
+    })
+}
+
+/// Interface for data and methods required for items rendering.
+#[derive(Debug)]
+pub(crate) struct RenderContext<'a> {
+    completion: &'a CompletionContext<'a>,
+}
+
+impl<'a> RenderContext<'a> {
+    pub(crate) fn new(completion: &'a CompletionContext<'a>) -> RenderContext<'a> {
+        RenderContext { completion }
+    }
+
+    fn snippet_cap(&self) -> Option<SnippetCap> {
+        self.completion.config.snippet_cap.clone()
+    }
+
+    fn db(&self) -> &'a RootDatabase {
+        &self.completion.db
+    }
+
+    fn source_range(&self) -> TextRange {
+        self.completion.source_range()
+    }
+
+    fn is_deprecated(&self, node: impl HasAttrs) -> bool {
+        let attrs = node.attrs(self.db());
+        attrs.by_key("deprecated").exists() || attrs.by_key("rustc_deprecated").exists()
+    }
+
+    fn is_deprecated_assoc_item(&self, as_assoc_item: impl AsAssocItem) -> bool {
+        let db = self.db();
+        let assoc = match as_assoc_item.as_assoc_item(db) {
+            Some(assoc) => assoc,
+            None => return false,
+        };
+
+        let is_assoc_deprecated = match assoc {
+            hir::AssocItem::Function(it) => self.is_deprecated(it),
+            hir::AssocItem::Const(it) => self.is_deprecated(it),
+            hir::AssocItem::TypeAlias(it) => self.is_deprecated(it),
+        };
+        is_assoc_deprecated
+            || assoc.containing_trait(db).map(|trait_| self.is_deprecated(trait_)).unwrap_or(false)
+    }
+
+    fn docs(&self, node: impl HasAttrs) -> Option<Documentation> {
+        node.docs(self.db())
+    }
+
+    fn active_name_and_type(&self) -> Option<(String, Type)> {
+        if let Some(record_field) = &self.completion.record_field_syntax {
+            mark::hit!(record_field_type_match);
+            let (struct_field, _local) = self.completion.sema.resolve_record_field(record_field)?;
+            Some((struct_field.name(self.db()).to_string(), struct_field.signature_ty(self.db())))
+        } else if let Some(active_parameter) = &self.completion.active_parameter {
+            mark::hit!(active_param_type_match);
+            Some((active_parameter.name.clone(), active_parameter.ty.clone()))
+        } else {
+            None
+        }
+    }
+}
+
+/// Generic renderer for completion items.
+#[derive(Debug)]
+struct Render<'a> {
+    ctx: RenderContext<'a>,
+}
+
+impl<'a> Render<'a> {
+    fn new(ctx: RenderContext<'a>) -> Render<'a> {
+        Render { ctx }
+    }
+
+    fn add_field(&mut self, field: hir::Field, ty: &Type) -> CompletionItem {
+        let is_deprecated = self.ctx.is_deprecated(field);
+        let name = field.name(self.ctx.db());
+        let mut item = CompletionItem::new(
+            CompletionKind::Reference,
+            self.ctx.source_range(),
+            name.to_string(),
+        )
+        .kind(SymbolKind::Field)
+        .detail(ty.display(self.ctx.db()).to_string())
+        .set_documentation(field.docs(self.ctx.db()))
+        .set_deprecated(is_deprecated);
+
+        if let Some(score) = compute_score(&self.ctx, &ty, &name.to_string()) {
+            item = item.set_score(score);
+        }
+
+        item.build()
+    }
+
+    fn add_tuple_field(&mut self, field: usize, ty: &Type) -> CompletionItem {
+        CompletionItem::new(CompletionKind::Reference, self.ctx.source_range(), field.to_string())
+            .kind(SymbolKind::Field)
+            .detail(ty.display(self.ctx.db()).to_string())
+            .build()
+    }
+
+    fn render_resolution(
+        self,
+        local_name: String,
+        import_to_add: Option<ImportEdit>,
+        resolution: &ScopeDef,
+    ) -> Option<CompletionItem> {
+        let _p = profile::span("render_resolution");
+        use hir::ModuleDef::*;
+
+        let completion_kind = match resolution {
+            ScopeDef::ModuleDef(BuiltinType(..)) => CompletionKind::BuiltinType,
+            _ => CompletionKind::Reference,
+        };
+
+        let kind = match resolution {
+            ScopeDef::ModuleDef(Function(func)) => {
+                return render_fn(self.ctx, import_to_add, Some(local_name), *func);
+            }
+            ScopeDef::ModuleDef(Variant(_))
+                if self.ctx.completion.is_pat_binding_or_const
+                    | self.ctx.completion.is_irrefutable_pat_binding =>
+            {
+                CompletionItemKind::SymbolKind(SymbolKind::Variant)
+            }
+            ScopeDef::ModuleDef(Variant(var)) => {
+                let item = render_variant(self.ctx, import_to_add, Some(local_name), *var, None);
+                return Some(item);
+            }
+            ScopeDef::MacroDef(mac) => {
+                let item = render_macro(self.ctx, import_to_add, local_name, *mac);
+                return item;
+            }
+
+            ScopeDef::ModuleDef(Module(..)) => CompletionItemKind::SymbolKind(SymbolKind::Module),
+            ScopeDef::ModuleDef(Adt(adt)) => CompletionItemKind::SymbolKind(match adt {
+                hir::Adt::Struct(_) => SymbolKind::Struct,
+                hir::Adt::Union(_) => SymbolKind::Union,
+                hir::Adt::Enum(_) => SymbolKind::Enum,
+            }),
+            ScopeDef::ModuleDef(Const(..)) => CompletionItemKind::SymbolKind(SymbolKind::Const),
+            ScopeDef::ModuleDef(Static(..)) => CompletionItemKind::SymbolKind(SymbolKind::Static),
+            ScopeDef::ModuleDef(Trait(..)) => CompletionItemKind::SymbolKind(SymbolKind::Trait),
+            ScopeDef::ModuleDef(TypeAlias(..)) => {
+                CompletionItemKind::SymbolKind(SymbolKind::TypeAlias)
+            }
+            ScopeDef::ModuleDef(BuiltinType(..)) => CompletionItemKind::BuiltinType,
+            ScopeDef::GenericParam(param) => CompletionItemKind::SymbolKind(match param {
+                hir::GenericParam::TypeParam(_) => SymbolKind::TypeParam,
+                hir::GenericParam::LifetimeParam(_) => SymbolKind::LifetimeParam,
+                hir::GenericParam::ConstParam(_) => SymbolKind::ConstParam,
+            }),
+            ScopeDef::Local(..) => CompletionItemKind::SymbolKind(SymbolKind::Local),
+            ScopeDef::AdtSelfType(..) | ScopeDef::ImplSelfType(..) => {
+                CompletionItemKind::SymbolKind(SymbolKind::SelfParam)
+            }
+            ScopeDef::Unknown => {
+                let item = CompletionItem::new(
+                    CompletionKind::Reference,
+                    self.ctx.source_range(),
+                    local_name,
+                )
+                .kind(CompletionItemKind::UnresolvedReference)
+                .add_import(import_to_add)
+                .build();
+                return Some(item);
+            }
+        };
+
+        let mut item =
+            CompletionItem::new(completion_kind, self.ctx.source_range(), local_name.clone());
+        if let ScopeDef::Local(local) = resolution {
+            let ty = local.ty(self.ctx.db());
+            if !ty.is_unknown() {
+                item = item.detail(ty.display(self.ctx.db()).to_string());
+            }
+        };
+
+        let mut ref_match = None;
+        if let ScopeDef::Local(local) = resolution {
+            if let Some((active_name, active_type)) = self.ctx.active_name_and_type() {
+                let ty = local.ty(self.ctx.db());
+                if let Some(score) =
+                    compute_score_from_active(&active_type, &active_name, &ty, &local_name)
+                {
+                    item = item.set_score(score);
+                }
+                ref_match = refed_type_matches(&active_type, &active_name, &ty, &local_name);
+            }
+        }
+
+        // Add `<>` for generic types
+        if self.ctx.completion.is_path_type
+            && !self.ctx.completion.has_type_args
+            && self.ctx.completion.config.add_call_parenthesis
+        {
+            if let Some(cap) = self.ctx.snippet_cap() {
+                let has_non_default_type_params = match resolution {
+                    ScopeDef::ModuleDef(Adt(it)) => it.has_non_default_type_params(self.ctx.db()),
+                    ScopeDef::ModuleDef(TypeAlias(it)) => {
+                        it.has_non_default_type_params(self.ctx.db())
+                    }
+                    _ => false,
+                };
+                if has_non_default_type_params {
+                    mark::hit!(inserts_angle_brackets_for_generics);
+                    item = item
+                        .lookup_by(local_name.clone())
+                        .label(format!("{}<…>", local_name))
+                        .insert_snippet(cap, format!("{}<$0>", local_name));
+                }
+            }
+        }
+
+        Some(
+            item.kind(kind)
+                .add_import(import_to_add)
+                .set_ref_match(ref_match)
+                .set_documentation(self.docs(resolution))
+                .set_deprecated(self.is_deprecated(resolution))
+                .build(),
+        )
+    }
+
+    fn docs(&self, resolution: &ScopeDef) -> Option<Documentation> {
+        use hir::ModuleDef::*;
+        match resolution {
+            ScopeDef::ModuleDef(Module(it)) => it.docs(self.ctx.db()),
+            ScopeDef::ModuleDef(Adt(it)) => it.docs(self.ctx.db()),
+            ScopeDef::ModuleDef(Variant(it)) => it.docs(self.ctx.db()),
+            ScopeDef::ModuleDef(Const(it)) => it.docs(self.ctx.db()),
+            ScopeDef::ModuleDef(Static(it)) => it.docs(self.ctx.db()),
+            ScopeDef::ModuleDef(Trait(it)) => it.docs(self.ctx.db()),
+            ScopeDef::ModuleDef(TypeAlias(it)) => it.docs(self.ctx.db()),
+            _ => None,
+        }
+    }
+
+    fn is_deprecated(&self, resolution: &ScopeDef) -> bool {
+        match resolution {
+            ScopeDef::ModuleDef(it) => self.ctx.is_deprecated_assoc_item(*it),
+            ScopeDef::MacroDef(it) => self.ctx.is_deprecated(*it),
+            ScopeDef::GenericParam(it) => self.ctx.is_deprecated(*it),
+            ScopeDef::AdtSelfType(it) => self.ctx.is_deprecated(*it),
+            _ => false,
+        }
+    }
+}
+
+fn compute_score_from_active(
+    active_type: &Type,
+    active_name: &str,
+    ty: &Type,
+    name: &str,
+) -> Option<CompletionScore> {
+    // Compute score
+    // For the same type
+    if active_type != ty {
+        return None;
+    }
+
+    let mut res = CompletionScore::TypeMatch;
+
+    // If same type + same name then go top position
+    if active_name == name {
+        res = CompletionScore::TypeAndNameMatch
+    }
+
+    Some(res)
+}
+fn refed_type_matches(
+    active_type: &Type,
+    active_name: &str,
+    ty: &Type,
+    name: &str,
+) -> Option<(Mutability, CompletionScore)> {
+    let derefed_active = active_type.remove_ref()?;
+    let score = compute_score_from_active(&derefed_active, &active_name, &ty, &name)?;
+    Some((
+        if active_type.is_mutable_reference() { Mutability::Mut } else { Mutability::Shared },
+        score,
+    ))
+}
+
+fn compute_score(ctx: &RenderContext, ty: &Type, name: &str) -> Option<CompletionScore> {
+    let (active_name, active_type) = ctx.active_name_and_type()?;
+    compute_score_from_active(&active_type, &active_name, ty, name)
+}
+
+#[cfg(test)]
+mod tests {
+    use std::cmp::Reverse;
+
+    use expect_test::{expect, Expect};
+    use test_utils::mark;
+
+    use crate::{
+        test_utils::{check_edit, do_completion, get_all_items, TEST_CONFIG},
+        CompletionKind, CompletionScore,
+    };
+
+    fn check(ra_fixture: &str, expect: Expect) {
+        let actual = do_completion(ra_fixture, CompletionKind::Reference);
+        expect.assert_debug_eq(&actual);
+    }
+
+    fn check_scores(ra_fixture: &str, expect: Expect) {
+        fn display_score(score: Option<CompletionScore>) -> &'static str {
+            match score {
+                Some(CompletionScore::TypeMatch) => "[type]",
+                Some(CompletionScore::TypeAndNameMatch) => "[type+name]",
+                None => "[]".into(),
+            }
+        }
+
+        let mut completions = get_all_items(TEST_CONFIG, ra_fixture);
+        completions.sort_by_key(|it| (Reverse(it.score()), it.label().to_string()));
+        let actual = completions
+            .into_iter()
+            .filter(|it| it.completion_kind == CompletionKind::Reference)
+            .map(|it| {
+                let tag = it.kind().unwrap().tag();
+                let score = display_score(it.score());
+                format!("{} {} {}\n", tag, it.label(), score)
+            })
+            .collect::<String>();
+        expect.assert_eq(&actual);
+    }
+
+    #[test]
+    fn enum_detail_includes_record_fields() {
+        check(
+            r#"
+enum Foo { Foo { x: i32, y: i32 } }
+
+fn main() { Foo::Fo$0 }
+"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "Foo",
+                        source_range: 54..56,
+                        delete: 54..56,
+                        insert: "Foo",
+                        kind: SymbolKind(
+                            Variant,
+                        ),
+                        detail: "{ x: i32, y: i32 }",
+                    },
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn enum_detail_doesnt_include_tuple_fields() {
+        check(
+            r#"
+enum Foo { Foo (i32, i32) }
+
+fn main() { Foo::Fo$0 }
+"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "Foo(…)",
+                        source_range: 46..48,
+                        delete: 46..48,
+                        insert: "Foo($0)",
+                        kind: SymbolKind(
+                            Variant,
+                        ),
+                        lookup: "Foo",
+                        detail: "(i32, i32)",
+                        trigger_call_info: true,
+                    },
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn enum_detail_just_parentheses_for_unit() {
+        check(
+            r#"
+enum Foo { Foo }
+
+fn main() { Foo::Fo$0 }
+"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "Foo",
+                        source_range: 35..37,
+                        delete: 35..37,
+                        insert: "Foo",
+                        kind: SymbolKind(
+                            Variant,
+                        ),
+                        detail: "()",
+                    },
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn lookup_enums_by_two_qualifiers() {
+        check(
+            r#"
+mod m {
+    pub enum Spam { Foo, Bar(i32) }
+}
+fn main() { let _: m::Spam = S$0 }
+"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "Spam::Bar(…)",
+                        source_range: 75..76,
+                        delete: 75..76,
+                        insert: "Spam::Bar($0)",
+                        kind: SymbolKind(
+                            Variant,
+                        ),
+                        lookup: "Spam::Bar",
+                        detail: "(i32)",
+                        trigger_call_info: true,
+                    },
+                    CompletionItem {
+                        label: "m",
+                        source_range: 75..76,
+                        delete: 75..76,
+                        insert: "m",
+                        kind: SymbolKind(
+                            Module,
+                        ),
+                    },
+                    CompletionItem {
+                        label: "m::Spam::Foo",
+                        source_range: 75..76,
+                        delete: 75..76,
+                        insert: "m::Spam::Foo",
+                        kind: SymbolKind(
+                            Variant,
+                        ),
+                        lookup: "Spam::Foo",
+                        detail: "()",
+                    },
+                    CompletionItem {
+                        label: "main()",
+                        source_range: 75..76,
+                        delete: 75..76,
+                        insert: "main()$0",
+                        kind: SymbolKind(
+                            Function,
+                        ),
+                        lookup: "main",
+                        detail: "-> ()",
+                    },
+                ]
+            "#]],
+        )
+    }
+
+    #[test]
+    fn sets_deprecated_flag_in_items() {
+        check(
+            r#"
+#[deprecated]
+fn something_deprecated() {}
+#[rustc_deprecated(since = "1.0.0")]
+fn something_else_deprecated() {}
+
+fn main() { som$0 }
+"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "main()",
+                        source_range: 127..130,
+                        delete: 127..130,
+                        insert: "main()$0",
+                        kind: SymbolKind(
+                            Function,
+                        ),
+                        lookup: "main",
+                        detail: "-> ()",
+                    },
+                    CompletionItem {
+                        label: "something_deprecated()",
+                        source_range: 127..130,
+                        delete: 127..130,
+                        insert: "something_deprecated()$0",
+                        kind: SymbolKind(
+                            Function,
+                        ),
+                        lookup: "something_deprecated",
+                        detail: "-> ()",
+                        deprecated: true,
+                    },
+                    CompletionItem {
+                        label: "something_else_deprecated()",
+                        source_range: 127..130,
+                        delete: 127..130,
+                        insert: "something_else_deprecated()$0",
+                        kind: SymbolKind(
+                            Function,
+                        ),
+                        lookup: "something_else_deprecated",
+                        detail: "-> ()",
+                        deprecated: true,
+                    },
+                ]
+            "#]],
+        );
+
+        check(
+            r#"
+struct A { #[deprecated] the_field: u32 }
+fn foo() { A { the$0 } }
+"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "the_field",
+                        source_range: 57..60,
+                        delete: 57..60,
+                        insert: "the_field",
+                        kind: SymbolKind(
+                            Field,
+                        ),
+                        detail: "u32",
+                        deprecated: true,
+                    },
+                ]
+            "#]],
+        );
+    }
+
+    #[test]
+    fn renders_docs() {
+        check(
+            r#"
+struct S {
+    /// Field docs
+    foo:
+}
+impl S {
+    /// Method docs
+    fn bar(self) { self.$0 }
+}"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "bar()",
+                        source_range: 94..94,
+                        delete: 94..94,
+                        insert: "bar()$0",
+                        kind: Method,
+                        lookup: "bar",
+                        detail: "-> ()",
+                        documentation: Documentation(
+                            "Method docs",
+                        ),
+                    },
+                    CompletionItem {
+                        label: "foo",
+                        source_range: 94..94,
+                        delete: 94..94,
+                        insert: "foo",
+                        kind: SymbolKind(
+                            Field,
+                        ),
+                        detail: "{unknown}",
+                        documentation: Documentation(
+                            "Field docs",
+                        ),
+                    },
+                ]
+            "#]],
+        );
+
+        check(
+            r#"
+use self::my$0;
+
+/// mod docs
+mod my { }
+
+/// enum docs
+enum E {
+    /// variant docs
+    V
+}
+use self::E::*;
+"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "E",
+                        source_range: 10..12,
+                        delete: 10..12,
+                        insert: "E",
+                        kind: SymbolKind(
+                            Enum,
+                        ),
+                        documentation: Documentation(
+                            "enum docs",
+                        ),
+                    },
+                    CompletionItem {
+                        label: "V",
+                        source_range: 10..12,
+                        delete: 10..12,
+                        insert: "V",
+                        kind: SymbolKind(
+                            Variant,
+                        ),
+                        detail: "()",
+                        documentation: Documentation(
+                            "variant docs",
+                        ),
+                    },
+                    CompletionItem {
+                        label: "my",
+                        source_range: 10..12,
+                        delete: 10..12,
+                        insert: "my",
+                        kind: SymbolKind(
+                            Module,
+                        ),
+                        documentation: Documentation(
+                            "mod docs",
+                        ),
+                    },
+                ]
+            "#]],
+        )
+    }
+
+    #[test]
+    fn dont_render_attrs() {
+        check(
+            r#"
+struct S;
+impl S {
+    #[inline]
+    fn the_method(&self) { }
+}
+fn foo(s: S) { s.$0 }
+"#,
+            expect![[r#"
+                [
+                    CompletionItem {
+                        label: "the_method()",
+                        source_range: 81..81,
+                        delete: 81..81,
+                        insert: "the_method()$0",
+                        kind: Method,
+                        lookup: "the_method",
+                        detail: "-> ()",
+                    },
+                ]
+            "#]],
+        )
+    }
+
+    #[test]
+    fn no_call_parens_if_fn_ptr_needed() {
+        mark::check!(no_call_parens_if_fn_ptr_needed);
+        check_edit(
+            "foo",
+            r#"
+fn foo(foo: u8, bar: u8) {}
+struct ManualVtable { f: fn(u8, u8) }
+
+fn main() -> ManualVtable {
+    ManualVtable { f: f$0 }
+}
+"#,
+            r#"
+fn foo(foo: u8, bar: u8) {}
+struct ManualVtable { f: fn(u8, u8) }
+
+fn main() -> ManualVtable {
+    ManualVtable { f: foo }
+}
+"#,
+        );
+    }
+
+    #[test]
+    fn no_parens_in_use_item() {
+        mark::check!(no_parens_in_use_item);
+        check_edit(
+            "foo",
+            r#"
+mod m { pub fn foo() {} }
+use crate::m::f$0;
+"#,
+            r#"
+mod m { pub fn foo() {} }
+use crate::m::foo;
+"#,
+        );
+    }
+
+    #[test]
+    fn no_parens_in_call() {
+        check_edit(
+            "foo",
+            r#"
+fn foo(x: i32) {}
+fn main() { f$0(); }
+"#,
+            r#"
+fn foo(x: i32) {}
+fn main() { foo(); }
+"#,
+        );
+        check_edit(
+            "foo",
+            r#"
+struct Foo;
+impl Foo { fn foo(&self){} }
+fn f(foo: &Foo) { foo.f$0(); }
+"#,
+            r#"
+struct Foo;
+impl Foo { fn foo(&self){} }
+fn f(foo: &Foo) { foo.foo(); }
+"#,
+        );
+    }
+
+    #[test]
+    fn inserts_angle_brackets_for_generics() {
+        mark::check!(inserts_angle_brackets_for_generics);
+        check_edit(
+            "Vec",
+            r#"
+struct Vec<T> {}
+fn foo(xs: Ve$0)
+"#,
+            r#"
+struct Vec<T> {}
+fn foo(xs: Vec<$0>)
+"#,
+        );
+        check_edit(
+            "Vec",
+            r#"
+type Vec<T> = (T,);
+fn foo(xs: Ve$0)
+"#,
+            r#"
+type Vec<T> = (T,);
+fn foo(xs: Vec<$0>)
+"#,
+        );
+        check_edit(
+            "Vec",
+            r#"
+struct Vec<T = i128> {}
+fn foo(xs: Ve$0)
+"#,
+            r#"
+struct Vec<T = i128> {}
+fn foo(xs: Vec)
+"#,
+        );
+        check_edit(
+            "Vec",
+            r#"
+struct Vec<T> {}
+fn foo(xs: Ve$0<i128>)
+"#,
+            r#"
+struct Vec<T> {}
+fn foo(xs: Vec<i128>)
+"#,
+        );
+    }
+
+    #[test]
+    fn active_param_score() {
+        mark::check!(active_param_type_match);
+        check_scores(
+            r#"
+struct S { foo: i64, bar: u32, baz: u32 }
+fn test(bar: u32) { }
+fn foo(s: S) { test(s.$0) }
+"#,
+            expect![[r#"
+                fd bar [type+name]
+                fd baz [type]
+                fd foo []
+            "#]],
+        );
+    }
+
+    #[test]
+    fn record_field_scores() {
+        mark::check!(record_field_type_match);
+        check_scores(
+            r#"
+struct A { foo: i64, bar: u32, baz: u32 }
+struct B { x: (), y: f32, bar: u32 }
+fn foo(a: A) { B { bar: a.$0 }; }
+"#,
+            expect![[r#"
+                fd bar [type+name]
+                fd baz [type]
+                fd foo []
+            "#]],
+        )
+    }
+
+    #[test]
+    fn record_field_and_call_scores() {
+        check_scores(
+            r#"
+struct A { foo: i64, bar: u32, baz: u32 }
+struct B { x: (), y: f32, bar: u32 }
+fn f(foo: i64) {  }
+fn foo(a: A) { B { bar: f(a.$0) }; }
+"#,
+            expect![[r#"
+                fd foo [type+name]
+                fd bar []
+                fd baz []
+            "#]],
+        );
+        check_scores(
+            r#"
+struct A { foo: i64, bar: u32, baz: u32 }
+struct B { x: (), y: f32, bar: u32 }
+fn f(foo: i64) {  }
+fn foo(a: A) { f(B { bar: a.$0 }); }
+"#,
+            expect![[r#"
+                fd bar [type+name]
+                fd baz [type]
+                fd foo []
+            "#]],
+        );
+    }
+
+    #[test]
+    fn prioritize_exact_ref_match() {
+        check_scores(
+            r#"
+struct WorldSnapshot { _f: () };
+fn go(world: &WorldSnapshot) { go(w$0) }
+"#,
+            expect![[r#"
+                lc world [type+name]
+                st WorldSnapshot []
+                fn go(…) []
+            "#]],
+        );
+    }
+
+    #[test]
+    fn too_many_arguments() {
+        check_scores(
+            r#"
+struct Foo;
+fn f(foo: &Foo) { f(foo, w$0) }
+"#,
+            expect![[r#"
+                st Foo []
+                fn f(…) []
+                lc foo []
+            "#]],
+        );
+    }
+}