clippy_lints/src/operators/integer_division.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

use clippy_utils::diagnostics::span_lint_and_then;
use rustc_hir as hir;
use rustc_lint::LateContext;

use super::INTEGER_DIVISION;

pub(crate) fn check<'tcx>(
    cx: &LateContext<'tcx>,
    expr: &'tcx hir::Expr<'_>,
    op: hir::BinOpKind,
    left: &'tcx hir::Expr<'_>,
    right: &'tcx hir::Expr<'_>,
) {
    if op == hir::BinOpKind::Div
        && cx.typeck_results().expr_ty(left).is_integral()
        && cx.typeck_results().expr_ty(right).is_integral()
    {
        #[expect(clippy::collapsible_span_lint_calls, reason = "rust-clippy#7797")]
        span_lint_and_then(cx, INTEGER_DIVISION, expr.span, "integer division", |diag| {
            diag.help("division of integers may cause loss of precision. consider using floats");
        });
    }
}