From e3664c79a3d484a91668adca3da137cd8a3e49e5 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Wed, 3 Jun 2020 11:43:48 +0200
Subject: [PATCH] throw an exception when file does not exist

---
 arbitrile.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arbitrile.cpp b/arbitrile.cpp
index 2496564b..27dd2143 100644
--- a/arbitrile.cpp
+++ b/arbitrile.cpp
@@ -216,6 +216,7 @@ EX void load_tile(exp_parser& ep, arbi_tiling& c, bool unit) {
 
 EX void load(const string& fname, bool after_sliding IS(false)) {
   fhstream f(fname, "rt");
+  if(!f.f) throw hr_parse_exception("file " + fname + " does not exist");
   string s;
   while(true) {
     int c = fgetc(f.f);