parser: fix match for array of reference sumtype (#18487)

vlib/v/parser/if_match.v

@@ -238,7 +238,7 @@ fn (mut p Parser) match_expr() ast.MatchExpr {
 			&& (((ast.builtin_type_names_matcher.matches(p.tok.lit) || p.tok.lit[0].is_capital())
 			&& p.peek_tok.kind != .lpar) || (p.peek_tok.kind == .dot && p.peek_token(2).lit.len > 0
 			&& p.peek_token(2).lit[0].is_capital()))) || p.is_only_array_type()
-			|| p.tok.kind == .key_fn {
+			|| p.tok.kind == .key_fn || p.peek_token(2).kind == .amp {
 			mut types := []ast.Type{}
 			for {
 				// Sum type match

vlib/v/tests/match_array_of_reference_sumtype_test.v

@@ -0,0 +1,14 @@
+type MySumType = []&MyStructA | []&MyStructB
+
+struct MyStructA {}
+
+struct MyStructB {}
+
+fn test_match_branch_with_array_expression() {
+	t := MySumType([&MyStructA{}, &MyStructA{}])
+	ret := match t {
+		[]&MyStructA { '[]&MyStructA' }
+		[]&MyStructB { '[]&MyStructB' }
+	}
+	assert ret == '[]&MyStructA'
+}