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
|
//! Renderer for `enum` variants.
use hir::{HasAttrs, HirDisplay, ModPath, StructKind};
use ide_db::SymbolKind;
use itertools::Itertools;
use crate::{
item::{CompletionItem, CompletionKind, ImportEdit},
render::{builder_ext::Params, RenderContext},
};
pub(crate) fn render_variant<'a>(
ctx: RenderContext<'a>,
import_to_add: Option<ImportEdit>,
local_name: Option<String>,
variant: hir::Variant,
path: Option<ModPath>,
) -> CompletionItem {
let _p = profile::span("render_enum_variant");
EnumRender::new(ctx, local_name, variant, path).render(import_to_add)
}
#[derive(Debug)]
struct EnumRender<'a> {
ctx: RenderContext<'a>,
name: String,
variant: hir::Variant,
path: Option<ModPath>,
qualified_name: String,
short_qualified_name: String,
variant_kind: StructKind,
}
impl<'a> EnumRender<'a> {
fn new(
ctx: RenderContext<'a>,
local_name: Option<String>,
variant: hir::Variant,
path: Option<ModPath>,
) -> EnumRender<'a> {
let name = local_name.unwrap_or_else(|| variant.name(ctx.db()).to_string());
let variant_kind = variant.kind(ctx.db());
let (qualified_name, short_qualified_name) = match &path {
Some(path) => {
let full = path.to_string();
let segments = path.segments();
let short = segments[segments.len().saturating_sub(2)..].iter().join("::");
(full, short)
}
None => (name.to_string(), name.to_string()),
};
EnumRender { ctx, name, variant, path, qualified_name, short_qualified_name, variant_kind }
}
fn render(self, import_to_add: Option<ImportEdit>) -> CompletionItem {
let mut item = CompletionItem::new(
CompletionKind::Reference,
self.ctx.source_range(),
self.qualified_name.clone(),
);
item.kind(SymbolKind::Variant)
.set_documentation(self.variant.docs(self.ctx.db()))
.set_deprecated(self.ctx.is_deprecated(self.variant))
.add_import(import_to_add)
.detail(self.detail());
if self.variant_kind == StructKind::Tuple {
cov_mark::hit!(inserts_parens_for_tuple_enums);
let params = Params::Anonymous(self.variant.fields(self.ctx.db()).len());
item.add_call_parens(self.ctx.completion, self.short_qualified_name, params);
} else if self.path.is_some() {
item.lookup_by(self.short_qualified_name);
}
item.build()
}
fn detail(&self) -> String {
let detail_types = self
.variant
.fields(self.ctx.db())
.into_iter()
.map(|field| (field.name(self.ctx.db()), field.signature_ty(self.ctx.db())));
match self.variant_kind {
StructKind::Tuple | StructKind::Unit => format!(
"({})",
detail_types.map(|(_, t)| t.display(self.ctx.db()).to_string()).format(", ")
),
StructKind::Record => format!(
"{{ {} }}",
detail_types
.map(|(n, t)| format!("{}: {}", n, t.display(self.ctx.db()).to_string()))
.format(", ")
),
}
}
}
#[cfg(test)]
mod tests {
use crate::test_utils::check_edit;
#[test]
fn inserts_parens_for_tuple_enums() {
cov_mark::check!(inserts_parens_for_tuple_enums);
check_edit(
"Some",
r#"
enum Option<T> { Some(T), None }
use Option::*;
fn main() -> Option<i32> {
Som$0
}
"#,
r#"
enum Option<T> { Some(T), None }
use Option::*;
fn main() -> Option<i32> {
Some($0)
}
"#,
);
}
}
|
