36 lines
1.1 KiB
Rust
36 lines
1.1 KiB
Rust
use clippy_utils::diagnostics::span_lint_and_help;
|
|
use clippy_utils::ty::is_type_diagnostic_item;
|
|
use rustc_hir as hir;
|
|
use rustc_lint::LateContext;
|
|
use rustc_span::sym;
|
|
|
|
use super::UNWRAP_USED;
|
|
|
|
/// lint use of `unwrap()` for `Option`s and `Result`s
|
|
pub(super) fn check(cx: &LateContext<'_>, expr: &hir::Expr<'_>, recv: &hir::Expr<'_>) {
|
|
let obj_ty = cx.typeck_results().expr_ty(recv).peel_refs();
|
|
|
|
let mess = if is_type_diagnostic_item(cx, obj_ty, sym::option_type) {
|
|
Some((UNWRAP_USED, "an Option", "None"))
|
|
} else if is_type_diagnostic_item(cx, obj_ty, sym::result_type) {
|
|
Some((UNWRAP_USED, "a Result", "Err"))
|
|
} else {
|
|
None
|
|
};
|
|
|
|
if let Some((lint, kind, none_value)) = mess {
|
|
span_lint_and_help(
|
|
cx,
|
|
lint,
|
|
expr.span,
|
|
&format!("used `unwrap()` on `{}` value", kind,),
|
|
None,
|
|
&format!(
|
|
"if you don't want to handle the `{}` case gracefully, consider \
|
|
using `expect()` to provide a better panic message",
|
|
none_value,
|
|
),
|
|
);
|
|
}
|
|
}
|