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if_then_some_else_none: Check HIR tree before other checks.

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This commit is contained in:
Jason Newcomb 2024-06-11 14:56:15 -04:00
parent b26b820f3f
commit 517e1ac225
1 changed files with 5 additions and 20 deletions
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25
clippy_lints/src/if_then_some_else_none.rs
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@ -61,26 +61,6 @@ impl_lint_pass!(IfThenSomeElseNone => [IF_THEN_SOME_ELSE_NONE]);
impl<'tcx> LateLintPass<'tcx> for IfThenSomeElseNone {
fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
if !self.msrv.meets(msrvs::BOOL_THEN) {
return;
}
if in_external_macro(cx.sess(), expr.span) {
return;
}
// We only care about the top-most `if` in the chain
if is_else_clause(cx.tcx, expr) {
return;
}
// `bool::then()` and `bool::then_some()` are not const
if in_constant(cx, expr.hir_id) {
return;
}
let ctxt = expr.span.ctxt();
if let Some(higher::If {
cond,
then,
@ -89,9 +69,14 @@ impl<'tcx> LateLintPass<'tcx> for IfThenSomeElseNone {
&& let ExprKind::Block(then_block, _) = then.kind
&& let Some(then_expr) = then_block.expr
&& let ExprKind::Call(then_call, [then_arg]) = then_expr.kind
&& let ctxt = expr.span.ctxt()
&& then_expr.span.ctxt() == ctxt
&& is_res_lang_ctor(cx, path_res(cx, then_call), OptionSome)
&& is_res_lang_ctor(cx, path_res(cx, peel_blocks(els)), OptionNone)
&& !is_else_clause(cx.tcx, expr)
&& !in_constant(cx, expr.hir_id)
&& !in_external_macro(cx.sess(), expr.span)
&& self.msrv.meets(msrvs::BOOL_THEN)
&& !contains_return(then_block.stmts)
{
let mut app = Applicability::Unspecified;