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use hir::{Ty, AdtDef};
use crate::completion::{CompletionContext, Completions};
/// Complete fields in fields literals.
pub(super) fn complete_struct_literal(acc: &mut Completions, ctx: &CompletionContext) {
let (function, struct_lit) = match (&ctx.function, ctx.struct_lit_syntax) {
(Some(function), Some(struct_lit)) => (function, struct_lit),
_ => return,
};
let infer_result = function.infer(ctx.db);
let syntax_mapping = function.body_source_map(ctx.db);
let expr = match syntax_mapping.node_expr(struct_lit.into()) {
Some(expr) => expr,
None => return,
};
let ty = infer_result[expr].clone();
let (adt, substs) = match ty {
Ty::Adt { def_id, ref substs, .. } => (def_id, substs),
_ => return,
};
match adt {
AdtDef::Struct(s) => {
for field in s.fields(ctx.db) {
acc.add_field(ctx, field, substs);
}
}
// TODO unions
AdtDef::Enum(_) => (),
};
}
#[cfg(test)]
mod tests {
use insta::assert_debug_snapshot_matches;
use crate::completion::{CompletionItem, CompletionKind, do_completion};
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"
}
]"###);
}
}
|
