method_resolutions: FxHashMap<ExprId, Function>,
/// For each field access expr, records the field it resolves to.
field_resolutions: FxHashMap<ExprId, StructField>,
+ variant_resolutions: FxHashMap<ExprId, VariantDef>,
/// For each associated item record what it resolves to
assoc_resolutions: FxHashMap<ExprOrPatId, ImplItem>,
diagnostics: Vec<InferenceDiagnostic>,
pub fn field_resolution(&self, expr: ExprId) -> Option<StructField> {
self.field_resolutions.get(&expr).copied()
}
+ pub fn variant_resolution(&self, expr: ExprId) -> Option<VariantDef> {
+ self.variant_resolutions.get(&expr).copied()
+ }
pub fn assoc_resolutions_for_expr(&self, id: ExprId) -> Option<ImplItem> {
self.assoc_resolutions.get(&id.into()).copied()
}
obligations: Vec<Obligation>,
method_resolutions: FxHashMap<ExprId, Function>,
field_resolutions: FxHashMap<ExprId, StructField>,
+ variant_resolutions: FxHashMap<ExprId, VariantDef>,
assoc_resolutions: FxHashMap<ExprOrPatId, ImplItem>,
type_of_expr: ArenaMap<ExprId, Ty>,
type_of_pat: ArenaMap<PatId, Ty>,
InferenceContext {
method_resolutions: FxHashMap::default(),
field_resolutions: FxHashMap::default(),
+ variant_resolutions: FxHashMap::default(),
assoc_resolutions: FxHashMap::default(),
type_of_expr: ArenaMap::default(),
type_of_pat: ArenaMap::default(),
InferenceResult {
method_resolutions: self.method_resolutions,
field_resolutions: self.field_resolutions,
+ variant_resolutions: self.variant_resolutions,
assoc_resolutions: self.assoc_resolutions,
type_of_expr: expr_types,
type_of_pat: pat_types,
self.field_resolutions.insert(expr, field);
}
+ fn write_variant_resolution(&mut self, expr: ExprId, variant: VariantDef) {
+ self.variant_resolutions.insert(expr, variant);
+ }
+
fn write_assoc_resolution(&mut self, id: ExprOrPatId, item: ImplItem) {
self.assoc_resolutions.insert(id, item);
}
}
Expr::StructLit { path, fields, spread } => {
let (ty, def_id) = self.resolve_variant(path.as_ref());
+ if let Some(variant) = def_id {
+ self.write_variant_resolution(tgt_expr, variant);
+ }
+
let substs = ty.substs().unwrap_or_else(Substs::empty);
for (field_idx, field) in fields.iter().enumerate() {
let field_ty = def_id
-use hir::AdtDef;
+use hir::{Substs, Ty};
use crate::completion::{CompletionContext, Completions};
/// Complete fields in fields literals.
pub(super) fn complete_struct_literal(acc: &mut Completions, ctx: &CompletionContext) {
- let ty = match ctx.struct_lit_syntax.and_then(|it| ctx.analyzer.type_of(ctx.db, it.into())) {
+ let (ty, variant) = match ctx.struct_lit_syntax.and_then(|it| {
+ Some((ctx.analyzer.type_of(ctx.db, it.into())?, ctx.analyzer.resolve_variant(it)?))
+ }) {
Some(it) => it,
- None => return,
- };
- let (adt, substs) = match ty.as_adt() {
- Some(res) => res,
_ => return,
};
- match adt {
- AdtDef::Struct(s) => {
- for field in s.fields(ctx.db) {
- acc.add_field(ctx, field, substs);
- }
- }
- // FIXME unions
- AdtDef::Union(_) => (),
- AdtDef::Enum(_) => (),
+ let ty_substs = match ty {
+ Ty::Apply(it) => it.parameters,
+ _ => Substs::empty(),
};
+
+ for field in variant.fields(ctx.db) {
+ acc.add_field(ctx, field, &ty_substs);
+ }
}
#[cfg(test)]
⋮]
"###);
}
+
+ #[test]
+ fn test_struct_literal_enum_variant() {
+ let completions = complete(
+ r"
+ enum E {
+ A { a: u32 }
+ }
+ fn foo() {
+ let _ = E::A { <|> }
+ }
+ ",
+ );
+ assert_debug_snapshot_matches!(completions, @r###"
+ ⋮[
+ ⋮ CompletionItem {
+ ⋮ label: "a",
+ ⋮ source_range: [119; 119),
+ ⋮ delete: [119; 119),
+ ⋮ insert: "a",
+ ⋮ kind: Field,
+ ⋮ detail: "u32",
+ ⋮ },
+ ⋮]
+ "###);
+ }
+
+ #[test]
+ fn test_struct_literal_two_structs() {
+ let completions = complete(
+ r"
+ struct A { a: u32 }
+ struct B { b: u32 }
+
+ fn foo() {
+ let _: A = B { <|> }
+ }
+ ",
+ );
+ assert_debug_snapshot_matches!(completions, @r###"
+ ⋮[
+ ⋮ CompletionItem {
+ ⋮ label: "b",
+ ⋮ source_range: [119; 119),
+ ⋮ delete: [119; 119),
+ ⋮ insert: "b",
+ ⋮ kind: Field,
+ ⋮ detail: "u32",
+ ⋮ },
+ ⋮]
+ "###);
+ }
+
+ #[test]
+ fn test_struct_literal_generic_struct() {
+ let completions = complete(
+ r"
+ struct A<T> { a: T }
+
+ fn foo() {
+ let _: A<u32> = A { <|> }
+ }
+ ",
+ );
+ assert_debug_snapshot_matches!(completions, @r###"
+ ⋮[
+ ⋮ CompletionItem {
+ ⋮ label: "a",
+ ⋮ source_range: [93; 93),
+ ⋮ delete: [93; 93),
+ ⋮ insert: "a",
+ ⋮ kind: Field,
+ ⋮ detail: "u32",
+ ⋮ },
+ ⋮]
+ "###);
+ }
}