46 lines
1.4 KiB
Rust
46 lines
1.4 KiB
Rust
use super::IS_DIGIT_ASCII_RADIX;
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use clippy_config::msrvs::{self, Msrv};
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use clippy_utils::consts::{ConstEvalCtxt, FullInt};
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use clippy_utils::diagnostics::span_lint_and_sugg;
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use clippy_utils::source::snippet_with_applicability;
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use rustc_errors::Applicability;
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use rustc_hir::Expr;
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use rustc_lint::LateContext;
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pub(super) fn check<'tcx>(
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cx: &LateContext<'tcx>,
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expr: &'tcx Expr<'_>,
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self_arg: &'tcx Expr<'_>,
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radix: &'tcx Expr<'_>,
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msrv: &Msrv,
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) {
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if !msrv.meets(msrvs::IS_ASCII_DIGIT) {
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return;
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}
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if !cx.typeck_results().expr_ty_adjusted(self_arg).peel_refs().is_char() {
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return;
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}
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if let Some(radix_val) = ConstEvalCtxt::new(cx).eval_full_int(radix) {
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let (num, replacement) = match radix_val {
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FullInt::S(10) | FullInt::U(10) => (10, "is_ascii_digit"),
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FullInt::S(16) | FullInt::U(16) => (16, "is_ascii_hexdigit"),
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_ => return,
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};
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let mut applicability = Applicability::MachineApplicable;
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span_lint_and_sugg(
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cx,
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IS_DIGIT_ASCII_RADIX,
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expr.span,
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format!("use of `char::is_digit` with literal radix of {num}"),
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"try",
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format!(
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"{}.{replacement}()",
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snippet_with_applicability(cx, self_arg.span, "..", &mut applicability)
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),
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applicability,
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);
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}
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}
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