From 2fca6ad9716429660e7162807582db00c3ca6865 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Sun, 22 Mar 2026 21:49:35 +0100
Subject: Add operator< for Fraction.

---
 src/types.cc | 9 +++++++++
 src/types.h  | 1 +
 2 files changed, 10 insertions(+)

(limited to 'src')

diff --git a/src/types.cc b/src/types.cc
index bbb66e3a..3b79be2a 100644
--- a/src/types.cc
+++ b/src/types.cc
@@ -110,6 +110,15 @@ dcp::operator!= (Fraction const & a, Fraction const & b)
 }
 
 
+bool
+dcp::operator< (Fraction const& a, Fraction const& b)
+{
+	DCP_ASSERT(a.denominator > 0);
+	DCP_ASSERT(b.denominator > 0);
+	return a.numerator * b.denominator < b.numerator * a.denominator;
+}
+
+
 Colour::Colour (int r_, int g_, int b_)
 	: r (r_)
 	, g (g_)
diff --git a/src/types.h b/src/types.h
index e0b1f064..91363beb 100644
--- a/src/types.h
+++ b/src/types.h
@@ -176,6 +176,7 @@ public:
 
 extern bool operator== (Fraction const & a, Fraction const & b);
 extern bool operator!= (Fraction const & a, Fraction const & b);
+extern bool operator< (Fraction const& a, Fraction const& b);
 
 
 enum class NoteType {
-- 
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