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
|
use crate::{Diagnostic, DiagnosticsContext};
// Diagnostic: break-outside-of-loop
//
// This diagnostic is triggered if the `break` keyword is used outside of a loop.
pub(crate) fn break_outside_of_loop(
ctx: &DiagnosticsContext<'_>,
d: &hir::BreakOutsideOfLoop,
) -> Diagnostic {
let construct = if d.is_break { "break" } else { "continue" };
Diagnostic::new(
"break-outside-of-loop",
format!("{construct} outside of loop"),
ctx.sema.diagnostics_display_range(d.expr.clone().map(|it| it.into())).range,
)
}
#[cfg(test)]
mod tests {
use crate::tests::check_diagnostics;
#[test]
fn outside_of_loop() {
check_diagnostics(
r#"
fn foo() {
break;
//^^^^^ error: break outside of loop
break 'a;
//^^^^^^^^ error: break outside of loop
continue;
//^^^^^^^^ error: continue outside of loop
continue 'a;
//^^^^^^^^^^^ error: continue outside of loop
}
"#,
);
}
#[test]
fn async_blocks_are_borders() {
check_diagnostics(
r#"
fn foo() {
'a: loop {
async {
break;
//^^^^^ error: break outside of loop
break 'a;
//^^^^^^^^ error: break outside of loop
continue;
//^^^^^^^^ error: continue outside of loop
continue 'a;
//^^^^^^^^^^^ error: continue outside of loop
};
}
}
"#,
);
}
#[test]
fn closures_are_borders() {
check_diagnostics(
r#"
fn foo() {
'a: loop {
|| {
break;
//^^^^^ error: break outside of loop
break 'a;
//^^^^^^^^ error: break outside of loop
continue;
//^^^^^^^^ error: continue outside of loop
continue 'a;
//^^^^^^^^^^^ error: continue outside of loop
};
}
}
"#,
);
}
#[test]
fn blocks_pass_through() {
check_diagnostics(
r#"
fn foo() {
'a: loop {
{
break;
break 'a;
continue;
continue 'a;
}
}
}
"#,
);
}
#[test]
fn try_blocks_pass_through() {
check_diagnostics(
r#"
fn foo() {
'a: loop {
try {
break;
break 'a;
continue;
continue 'a;
};
}
}
"#,
);
}
#[test]
fn label_blocks() {
check_diagnostics(
r#"
fn foo() {
'a: {
break;
//^^^^^ error: break outside of loop
break 'a;
continue;
//^^^^^^^^ error: continue outside of loop
continue 'a;
//^^^^^^^^^^^ error: continue outside of loop
}
}
"#,
);
}
}
|