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Consolidate two arms doing the same thing

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This commit is contained in:
Michael Goulet 2024-04-11 12:34:53 -04:00
parent addd931fdb
commit ffdf277618
1 changed files with 13 additions and 16 deletions
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29
compiler/rustc_hir_typeck/src/coercion.rs
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@ -1829,39 +1829,36 @@ fn report_return_mismatched_types<'a>(
// Verify that this is a tail expression of a function, otherwise the
// label pointing out the cause for the type coercion will be wrong
// as prior return coercions would not be relevant (#57664).
let fn_decl = if let (Some(expr), Some(blk_id)) = (expression, blk_id) {
if let Some(expr) = expression
&& let Some(blk_id) = blk_id
{
fcx.suggest_missing_semicolon(&mut err, expr, expected, false);
let pointing_at_return_type =
fcx.suggest_mismatched_types_on_tail(&mut err, expr, expected, found, blk_id);
if let (Some(cond_expr), true, false) = (
fcx.tcx.hir().get_if_cause(expr.hir_id),
expected.is_unit(),
pointing_at_return_type,
)
if let Some(cond_expr) = fcx.tcx.hir().get_if_cause(expr.hir_id)
&& expected.is_unit()
&& !pointing_at_return_type
// If the block is from an external macro or try (`?`) desugaring, then
// do not suggest adding a semicolon, because there's nowhere to put it.
// See issues #81943 and #87051.
&& matches!(
cond_expr.span.desugaring_kind(),
None | Some(DesugaringKind::WhileLoop)
) && !in_external_macro(fcx.tcx.sess, cond_expr.span)
&& !matches!(
cond_expr.kind,
hir::ExprKind::Match(.., hir::MatchSource::TryDesugar(_))
)
)
&& !in_external_macro(fcx.tcx.sess, cond_expr.span)
&& !matches!(
cond_expr.kind,
hir::ExprKind::Match(.., hir::MatchSource::TryDesugar(_))
)
{
err.span_label(cond_expr.span, "expected this to be `()`");
if expr.can_have_side_effects() {
fcx.suggest_semicolon_at_end(cond_expr.span, &mut err);
}
}
fcx.get_node_fn_decl(parent)
.map(|(fn_id, fn_decl, _, is_main)| (fn_id, fn_decl, is_main))
} else {
fcx.get_fn_decl(parent_id)
};
if let Some((fn_id, fn_decl, can_suggest)) = fn_decl {
if let Some((fn_id, fn_decl, can_suggest)) = fcx.get_fn_decl(parent_id) {
if blk_id.is_none() {
fcx.suggest_missing_return_type(
&mut err,