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|
use crate::{Diagnostic, DiagnosticsContext};
// Diagnostic: missing-unsafe
//
// This diagnostic is triggered if an operation marked as `unsafe` is used outside of an `unsafe` function or block.
pub(crate) fn missing_unsafe(ctx: &DiagnosticsContext<'_>, d: &hir::MissingUnsafe) -> Diagnostic {
Diagnostic::new(
"missing-unsafe",
"this operation is unsafe and requires an unsafe function or block",
ctx.sema.diagnostics_display_range(d.expr.clone().map(|it| it.into())).range,
)
}
#[cfg(test)]
mod tests {
use crate::tests::check_diagnostics;
#[test]
fn missing_unsafe_diagnostic_with_raw_ptr() {
check_diagnostics(
r#"
fn main() {
let x = &5 as *const usize;
unsafe { let y = *x; }
let z = *x;
} //^^ error: this operation is unsafe and requires an unsafe function or block
"#,
)
}
#[test]
fn missing_unsafe_diagnostic_with_unsafe_call() {
check_diagnostics(
r#"
struct HasUnsafe;
impl HasUnsafe {
unsafe fn unsafe_fn(&self) {
let x = &5 as *const usize;
let y = *x;
}
}
unsafe fn unsafe_fn() {
let x = &5 as *const usize;
let y = *x;
}
fn main() {
unsafe_fn();
//^^^^^^^^^^^ error: this operation is unsafe and requires an unsafe function or block
HasUnsafe.unsafe_fn();
//^^^^^^^^^^^^^^^^^^^^^ error: this operation is unsafe and requires an unsafe function or block
unsafe {
unsafe_fn();
HasUnsafe.unsafe_fn();
}
}
"#,
);
}
#[test]
fn missing_unsafe_diagnostic_with_static_mut() {
check_diagnostics(
r#"
struct Ty {
a: u8,
}
static mut STATIC_MUT: Ty = Ty { a: 0 };
fn main() {
let x = STATIC_MUT.a;
//^^^^^^^^^^ error: this operation is unsafe and requires an unsafe function or block
unsafe {
let x = STATIC_MUT.a;
}
}
"#,
);
}
#[test]
fn no_missing_unsafe_diagnostic_with_safe_intrinsic() {
check_diagnostics(
r#"
extern "rust-intrinsic" {
pub fn bitreverse(x: u32) -> u32; // Safe intrinsic
pub fn floorf32(x: f32) -> f32; // Unsafe intrinsic
}
fn main() {
let _ = bitreverse(12);
let _ = floorf32(12.0);
//^^^^^^^^^^^^^^ error: this operation is unsafe and requires an unsafe function or block
}
"#,
);
}
}
|
