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use super::EXPLICIT_INTO_ITER_LOOP;
use clippy_utils::diagnostics::span_lint_and_sugg;
use clippy_utils::is_trait_method;
use clippy_utils::source::snippet_with_applicability;
use rustc_errors::Applicability;
use rustc_hir::Expr;
use rustc_lint::LateContext;
use rustc_span::symbol::sym;
pub(super) fn check(cx: &LateContext<'_>, self_arg: &Expr<'_>, call_expr: &Expr<'_>) {
let self_ty = cx.typeck_results().expr_ty(self_arg);
let self_ty_adjusted = cx.typeck_results().expr_ty_adjusted(self_arg);
if !(self_ty == self_ty_adjusted && is_trait_method(cx, call_expr, sym::IntoIterator)) {
return;
}
let mut applicability = Applicability::MachineApplicable;
let object = snippet_with_applicability(cx, self_arg.span, "_", &mut applicability);
span_lint_and_sugg(
cx,
EXPLICIT_INTO_ITER_LOOP,
call_expr.span,
"it is more concise to loop over containers instead of using explicit \
iteration methods",
"to write this more concisely, try",
object.to_string(),
applicability,
);
}
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