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
|
//! Lint for `c.is_digit(10)`
use super::IS_DIGIT_ASCII_RADIX;
use clippy_utils::{
consts::constant_full_int, consts::FullInt, diagnostics::span_lint_and_sugg, meets_msrv, msrvs,
source::snippet_with_applicability,
};
use rustc_errors::Applicability;
use rustc_hir::Expr;
use rustc_lint::LateContext;
use rustc_semver::RustcVersion;
pub(super) fn check<'tcx>(
cx: &LateContext<'tcx>,
expr: &'tcx Expr<'_>,
self_arg: &'tcx Expr<'_>,
radix: &'tcx Expr<'_>,
msrv: Option<RustcVersion>,
) {
if !meets_msrv(msrv, msrvs::IS_ASCII_DIGIT) {
return;
}
if !cx.typeck_results().expr_ty_adjusted(self_arg).peel_refs().is_char() {
return;
}
if let Some(radix_val) = constant_full_int(cx, cx.typeck_results(), radix) {
let (num, replacement) = match radix_val {
FullInt::S(10) | FullInt::U(10) => (10, "is_ascii_digit"),
FullInt::S(16) | FullInt::U(16) => (16, "is_ascii_hexdigit"),
_ => return,
};
let mut applicability = Applicability::MachineApplicable;
span_lint_and_sugg(
cx,
IS_DIGIT_ASCII_RADIX,
expr.span,
&format!("use of `char::is_digit` with literal radix of {num}"),
"try",
format!(
"{}.{replacement}()",
snippet_with_applicability(cx, self_arg.span, "..", &mut applicability)
),
applicability,
);
}
}
|
