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|
//! FIXME: write short doc here
use hir::Substs;
use crate::completion::{CompletionContext, Completions};
pub(super) fn complete_record_pattern(acc: &mut Completions, ctx: &CompletionContext) {
let (ty, variant) = match ctx.record_lit_pat.as_ref().and_then(|it| {
Some((
ctx.analyzer.type_of_pat(ctx.db, &it.clone().into())?,
ctx.analyzer.resolve_record_pattern(it)?,
))
}) {
Some(it) => it,
_ => return,
};
let substs = &ty.substs().unwrap_or_else(Substs::empty);
for field in variant.fields(ctx.db) {
acc.add_field(ctx, field, substs);
}
}
#[cfg(test)]
mod tests {
use crate::completion::{do_completion, CompletionItem, CompletionKind};
use insta::assert_debug_snapshot;
fn complete(code: &str) -> Vec<CompletionItem> {
do_completion(code, CompletionKind::Reference)
}
#[test]
fn test_record_pattern_field() {
let completions = complete(
r"
struct S { foo: u32 }
fn process(f: S) {
match f {
S { f<|>: 92 } => (),
}
}
",
);
assert_debug_snapshot!(completions, @r###"
⋮[
⋮ CompletionItem {
⋮ label: "foo",
⋮ source_range: [117; 118),
⋮ delete: [117; 118),
⋮ insert: "foo",
⋮ kind: Field,
⋮ detail: "u32",
⋮ },
⋮]
"###);
}
#[test]
fn test_record_pattern_enum_variant() {
let completions = complete(
r"
enum E {
S { foo: u32, bar: () }
}
fn process(e: E) {
match e {
E::S { <|> } => (),
}
}
",
);
assert_debug_snapshot!(completions, @r###"
⋮[
⋮ CompletionItem {
⋮ label: "bar",
⋮ source_range: [161; 161),
⋮ delete: [161; 161),
⋮ insert: "bar",
⋮ kind: Field,
⋮ detail: "()",
⋮ },
⋮ CompletionItem {
⋮ label: "foo",
⋮ source_range: [161; 161),
⋮ delete: [161; 161),
⋮ insert: "foo",
⋮ kind: Field,
⋮ detail: "u32",
⋮ },
⋮]
"###);
}
}
|
