rust-analyzer - Unnamed repository; edit this file 'description' to name the repository.


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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166

//! Completes `where` and `for` keywords.

use syntax::ast::{self, Item};

use crate::{CompletionContext, Completions};

pub(crate) fn complete_for_and_where(
    acc: &mut Completions,
    ctx: &CompletionContext,
    keyword_item: &ast::Item,
) {
    let mut add_keyword = |kw, snippet| acc.add_keyword_snippet(ctx, kw, snippet);

    match keyword_item {
        Item::Impl(it) => {
            if it.for_token().is_none() && it.trait_().is_none() && it.self_ty().is_some() {
                add_keyword("for", "for");
            }
            add_keyword("where", "where");
        }
        Item::Enum(_)
        | Item::Fn(_)
        | Item::Struct(_)
        | Item::Trait(_)
        | Item::TypeAlias(_)
        | Item::Union(_) => {
            add_keyword("where", "where");
        }
        _ => (),
    }
}

#[cfg(test)]
mod tests {
    use expect_test::{expect, Expect};

    use crate::tests::{check_edit, completion_list};

    fn check(ra_fixture: &str, expect: Expect) {
        let actual = completion_list(ra_fixture);
        expect.assert_eq(&actual)
    }

    #[test]
    fn test_else_edit_after_if() {
        check_edit(
            "else",
            r#"fn quux() { if true { () } $0 }"#,
            r#"fn quux() { if true { () } else {
    $0
} }"#,
        );
    }

    #[test]
    fn test_keywords_after_unsafe_in_block_expr() {
        check(
            r"fn my_fn() { unsafe $0 }",
            expect![[r#"
                kw fn
                kw impl
                kw trait
            "#]],
        );
    }

    #[test]
    fn test_completion_await_impls_future() {
        check(
            r#"
//- minicore: future
use core::future::*;
struct A {}
impl Future for A {}
fn foo(a: A) { a.$0 }
"#,
            expect![[r#"
                kw await expr.await
                sn box   Box::new(expr)
                sn call  function(expr)
                sn dbg   dbg!(expr)
                sn dbgr  dbg!(&expr)
                sn let   let
                sn letm  let mut
                sn match match expr {}
                sn ref   &expr
                sn refm  &mut expr
            "#]],
        );

        check(
            r#"
//- minicore: future
use std::future::*;
fn foo() {
    let a = async {};
    a.$0
}
"#,
            expect![[r#"
                kw await expr.await
                sn box   Box::new(expr)
                sn call  function(expr)
                sn dbg   dbg!(expr)
                sn dbgr  dbg!(&expr)
                sn let   let
                sn letm  let mut
                sn match match expr {}
                sn ref   &expr
                sn refm  &mut expr
            "#]],
        )
    }

    #[test]
    fn let_semi() {
        cov_mark::check!(let_semi);
        check_edit(
            "match",
            r#"
fn main() { let x = $0 }
"#,
            r#"
fn main() { let x = match $1 {
    $0
}; }
"#,
        );

        check_edit(
            "if",
            r#"
fn main() {
    let x = $0
    let y = 92;
}
"#,
            r#"
fn main() {
    let x = if $1 {
    $0
};
    let y = 92;
}
"#,
        );

        check_edit(
            "loop",
            r#"
fn main() {
    let x = $0
    bar();
}
"#,
            r#"
fn main() {
    let x = loop {
    $0
};
    bar();
}
"#,
        );
    }
}