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|
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, 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,
_ => return,
};
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)]
mod tests {
use crate::completion::{do_completion, CompletionItem, CompletionKind};
use insta::assert_debug_snapshot_matches;
fn complete(code: &str) -> Vec<CompletionItem> {
do_completion(code, CompletionKind::Reference)
}
#[test]
fn test_struct_literal_field() {
let completions = complete(
r"
struct A { the_field: u32 }
fn foo() {
A { the<|> }
}
",
);
assert_debug_snapshot_matches!(completions, @r###"
⋮[
⋮ CompletionItem {
⋮ label: "the_field",
⋮ source_range: [83; 86),
⋮ delete: [83; 86),
⋮ insert: "the_field",
⋮ kind: Field,
⋮ detail: "u32",
⋮ },
⋮]
"###);
}
#[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",
⋮ },
⋮]
"###);
}
}
|
