rust-clippy/clippy_lints/src/methods/skip_while_next.rs

use crate::utils::{match_trait_method, paths, span_lint_and_help};
use rustc_hir as hir;
use rustc_lint::LateContext;

use super::SKIP_WHILE_NEXT;

/// lint use of `skip_while().next()` for `Iterators`
pub(super) fn check<'tcx>(cx: &LateContext<'tcx>, expr: &'tcx hir::Expr<'_>, _skip_while_args: &'tcx [hir::Expr<'_>]) {
    // lint if caller of `.skip_while().next()` is an Iterator
    if match_trait_method(cx, expr, &paths::ITERATOR) {
        span_lint_and_help(
            cx,
            SKIP_WHILE_NEXT,
            expr.span,
            "called `skip_while(<p>).next()` on an `Iterator`",
            None,
            "this is more succinctly expressed by calling `.find(!<p>)` instead",
        );
    }
}