1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
//! FIXME: write short doc here
mod completion_item;
mod completion_context;
mod presentation;
mod complete_dot;
mod complete_record_literal;
mod complete_record_pattern;
mod complete_pattern;
mod complete_fn_param;
mod complete_keyword;
mod complete_snippet;
mod complete_path;
mod complete_scope;
mod complete_postfix;
mod complete_macro_in_item_position;
use ra_db::SourceDatabase;
#[cfg(test)]
use crate::completion::completion_item::do_completion;
use crate::{
completion::{
completion_context::CompletionContext,
completion_item::{CompletionKind, Completions},
},
db, FilePosition,
};
pub use crate::completion::completion_item::{
CompletionItem, CompletionItemKind, InsertTextFormat,
};
/// Main entry point for completion. We run completion as a two-phase process.
///
/// First, we look at the position and collect a so-called `CompletionContext.
/// This is a somewhat messy process, because, during completion, syntax tree is
/// incomplete and can look really weird.
///
/// Once the context is collected, we run a series of completion routines which
/// look at the context and produce completion items. One subtlety about this
/// phase is that completion engine should not filter by the substring which is
/// already present, it should give all possible variants for the identifier at
/// the caret. In other words, for
///
/// ```no-run
/// fn f() {
/// let foo = 92;
/// let _ = bar<|>
/// }
/// ```
///
/// `foo` *should* be present among the completion variants. Filtering by
/// identifier prefix/fuzzy match should be done higher in the stack, together
/// with ordering of completions (currently this is done by the client).
pub(crate) fn completions(db: &db::RootDatabase, position: FilePosition) -> Option<Completions> {
let original_parse = db.parse(position.file_id);
let ctx = CompletionContext::new(db, &original_parse, position)?;
let mut acc = Completions::default();
complete_fn_param::complete_fn_param(&mut acc, &ctx);
complete_keyword::complete_expr_keyword(&mut acc, &ctx);
complete_keyword::complete_use_tree_keyword(&mut acc, &ctx);
complete_snippet::complete_expr_snippet(&mut acc, &ctx);
complete_snippet::complete_item_snippet(&mut acc, &ctx);
complete_path::complete_path(&mut acc, &ctx);
complete_scope::complete_scope(&mut acc, &ctx);
complete_dot::complete_dot(&mut acc, &ctx);
complete_record_literal::complete_record_literal(&mut acc, &ctx);
complete_record_pattern::complete_record_pattern(&mut acc, &ctx);
complete_pattern::complete_pattern(&mut acc, &ctx);
complete_postfix::complete_postfix(&mut acc, &ctx);
complete_macro_in_item_position::complete_macro_in_item_position(&mut acc, &ctx);
Some(acc)
}
|
