From 3ce0bcf1401d02b5bb6567e524f368db4bb6587d Mon Sep 17 00:00:00 2001
From: Bruno BELANYI <bruno@belanyi.fr>
Date: Sun, 8 Nov 2020 17:13:54 +0100
Subject: [PATCH] pratt: eval: report errors when parsing nul

---
 src/eval.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/eval.c b/src/eval.c
index e3439f7..21a43aa 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -179,7 +179,8 @@ static bool parse_until(const char **input, int *res, int prio) {
         nul_f *nul_func = ops[tok.kind].nul_func;
         if (!nul_func)
             return false; // Error: not a prefix operator
-        nul_func(input, res, prio);
+        if (!nul_func(input, res, prio))
+            return false; // Error: could not parse right-hand-side
     }
 
     // Do left-loop