ide_completion/completions/attribute/
repr.rs

1//! Completion for representations.
2
3use ide_db::SymbolKind;
4use syntax::ast;
5
6use crate::{Completions, context::CompletionContext, item::CompletionItem};
7
8pub(super) fn complete_repr(
9    acc: &mut Completions,
10    ctx: &CompletionContext<'_, '_>,
11    existing_reprs: &[ast::Expr],
12) {
13    for &ReprCompletion { label, snippet, lookup, collides } in REPR_COMPLETIONS {
14        let repr_already_annotated = existing_reprs
15            .iter()
16            .filter_map(|expr| match expr {
17                ast::Expr::PathExpr(path) => path.path()?.as_single_name_ref(),
18                ast::Expr::CallExpr(call) => match call.expr()? {
19                    ast::Expr::PathExpr(path) => path.path()?.as_single_name_ref(),
20                    _ => None,
21                },
22                _ => None,
23            })
24            .any(|it| {
25                let text = it.text();
26                lookup.unwrap_or(label) == text || collides.contains(&text.as_str())
27            });
28        if repr_already_annotated {
29            continue;
30        }
31
32        let mut item =
33            CompletionItem::new(SymbolKind::BuiltinAttr, ctx.source_range(), label, ctx.edition);
34        if let Some(lookup) = lookup {
35            item.lookup_by(lookup);
36        }
37        if let Some((snippet, cap)) = snippet.zip(ctx.config.snippet_cap) {
38            item.insert_snippet(cap, snippet);
39        }
40        item.add_to(acc, ctx.db);
41    }
42}
43
44struct ReprCompletion {
45    label: &'static str,
46    snippet: Option<&'static str>,
47    lookup: Option<&'static str>,
48    collides: &'static [&'static str],
49}
50
51const fn attr(label: &'static str, collides: &'static [&'static str]) -> ReprCompletion {
52    ReprCompletion { label, snippet: None, lookup: None, collides }
53}
54
55#[rustfmt::skip]
56const REPR_COMPLETIONS: &[ReprCompletion] = &[
57    ReprCompletion { label: "align($0)", snippet: Some("align($0)"), lookup: Some("align"), collides: &["transparent", "packed"] },
58    attr("packed", &["transparent", "align"]),
59    attr("transparent", &["C", "u8", "u16", "u32", "u64", "u128", "usize", "i8", "i16", "i32", "i64", "i128", "isize"]),
60    attr("C", &["transparent"]),
61    attr("u8",     &["transparent", "u16", "u32", "u64", "u128", "usize", "i8", "i16", "i32", "i64", "i128", "isize"]),
62    attr("u16",    &["transparent", "u8", "u32", "u64", "u128", "usize", "i8", "i16", "i32", "i64", "i128", "isize"]),
63    attr("u32",    &["transparent", "u8", "u16", "u64", "u128", "usize", "i8", "i16", "i32", "i64", "i128", "isize"]),
64    attr("u64",    &["transparent", "u8", "u16", "u32", "u128", "usize", "i8", "i16", "i32", "i64", "i128", "isize"]),
65    attr("u128",   &["transparent", "u8", "u16", "u32", "u64", "usize", "i8", "i16", "i32", "i64", "i128", "isize"]),
66    attr("usize",  &["transparent", "u8", "u16", "u32", "u64", "u128", "i8", "i16", "i32", "i64", "i128", "isize"]),
67    attr("i8",     &["transparent", "u8", "u16", "u32", "u64", "u128", "usize", "i16", "i32", "i64", "i128", "isize"]),
68    attr("i16",    &["transparent", "u8", "u16", "u32", "u64", "u128", "usize", "i8", "i32", "i64", "i128", "isize"]),
69    attr("i32",    &["transparent", "u8", "u16", "u32", "u64", "u128", "usize", "i8", "i16", "i64", "i128", "isize"]),
70    attr("i64",    &["transparent", "u8", "u16", "u32", "u64", "u128", "usize", "i8", "i16", "i32", "i128", "isize"]),
71    attr("i28",    &["transparent", "u8", "u16", "u32", "u64", "u128", "usize", "i8", "i16", "i32", "i64", "isize"]),
72    attr("isize",  &["transparent", "u8", "u16", "u32", "u64", "u128", "usize", "i8", "i16", "i32", "i64", "i128"]),
73];
ide_completion/completions/attribute/repr.rs

ide_completion/completions/attribute/
repr.rs
