From 1f6632c7c79242a18a2a64e1b6f9e47d66ccca8d Mon Sep 17 00:00:00 2001
From: Tino Didriksen <mail@tinodidriksen.com>
Date: Sun, 29 Oct 2023 20:34:40 +0100
Subject: [PATCH] std::unary_function no longer exists

---
 apertium/perceptron_spec.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/apertium/perceptron_spec.h b/apertium/perceptron_spec.h
index 5b8e9866..069d3864 100644
--- a/apertium/perceptron_spec.h
+++ b/apertium/perceptron_spec.h
@@ -475,7 +475,7 @@ class PerceptronSpec
       int token_idx,
       int wordoid_idx);
   };
-  struct In : public std::unary_function<const std::string&, bool> {
+  struct In {
     const VMSet& haystack;
     In(const VMSet &haystack);
     bool operator() (const std::string &needle) const;