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-rw-r--r--crates/ide_diagnostics/src/handlers/missing_unsafe.rs101
1 files changed, 101 insertions, 0 deletions
diff --git a/crates/ide_diagnostics/src/handlers/missing_unsafe.rs b/crates/ide_diagnostics/src/handlers/missing_unsafe.rs
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+++ b/crates/ide_diagnostics/src/handlers/missing_unsafe.rs
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1use crate::{Diagnostic, DiagnosticsContext};
2
3// Diagnostic: missing-unsafe
4//
5// This diagnostic is triggered if an operation marked as `unsafe` is used outside of an `unsafe` function or block.
6pub(crate) fn missing_unsafe(ctx: &DiagnosticsContext<'_>, d: &hir::MissingUnsafe) -> Diagnostic {
7 Diagnostic::new(
8 "missing-unsafe",
9 "this operation is unsafe and requires an unsafe function or block",
10 ctx.sema.diagnostics_display_range(d.expr.clone().map(|it| it.into())).range,
11 )
12}
13
14#[cfg(test)]
15mod tests {
16 use crate::tests::check_diagnostics;
17
18 #[test]
19 fn missing_unsafe_diagnostic_with_raw_ptr() {
20 check_diagnostics(
21 r#"
22fn main() {
23 let x = &5 as *const usize;
24 unsafe { let y = *x; }
25 let z = *x;
26} //^^ error: this operation is unsafe and requires an unsafe function or block
27"#,
28 )
29 }
30
31 #[test]
32 fn missing_unsafe_diagnostic_with_unsafe_call() {
33 check_diagnostics(
34 r#"
35struct HasUnsafe;
36
37impl HasUnsafe {
38 unsafe fn unsafe_fn(&self) {
39 let x = &5 as *const usize;
40 let y = *x;
41 }
42}
43
44unsafe fn unsafe_fn() {
45 let x = &5 as *const usize;
46 let y = *x;
47}
48
49fn main() {
50 unsafe_fn();
51 //^^^^^^^^^^^ error: this operation is unsafe and requires an unsafe function or block
52 HasUnsafe.unsafe_fn();
53 //^^^^^^^^^^^^^^^^^^^^^ error: this operation is unsafe and requires an unsafe function or block
54 unsafe {
55 unsafe_fn();
56 HasUnsafe.unsafe_fn();
57 }
58}
59"#,
60 );
61 }
62
63 #[test]
64 fn missing_unsafe_diagnostic_with_static_mut() {
65 check_diagnostics(
66 r#"
67struct Ty {
68 a: u8,
69}
70
71static mut STATIC_MUT: Ty = Ty { a: 0 };
72
73fn main() {
74 let x = STATIC_MUT.a;
75 //^^^^^^^^^^ error: this operation is unsafe and requires an unsafe function or block
76 unsafe {
77 let x = STATIC_MUT.a;
78 }
79}
80"#,
81 );
82 }
83
84 #[test]
85 fn no_missing_unsafe_diagnostic_with_safe_intrinsic() {
86 check_diagnostics(
87 r#"
88extern "rust-intrinsic" {
89 pub fn bitreverse(x: u32) -> u32; // Safe intrinsic
90 pub fn floorf32(x: f32) -> f32; // Unsafe intrinsic
91}
92
93fn main() {
94 let _ = bitreverse(12);
95 let _ = floorf32(12.0);
96 //^^^^^^^^^^^^^^ error: this operation is unsafe and requires an unsafe function or block
97}
98"#,
99 );
100 }
101}