From 3424ae43afd77184d7206cfabfa140757009d24e Mon Sep 17 00:00:00 2001
From: paranoiq <cz.paranoiq@gmail.com>
Date: Wed, 17 Feb 2021 16:15:33 +0100
Subject: [PATCH] Add invert() on all interval sets

---
 src/Math/Interval/FloatIntervalSet.php | 5 +++++
 src/Math/Interval/IntIntervalSet.php   | 5 +++++
 src/Time/Interval/DateIntervalSet.php  | 5 +++++
 src/Time/Interval/NightIntervalSet.php | 5 +++++
 src/Time/Interval/TimeIntervalSet.php  | 5 +++++
 5 files changed, 25 insertions(+)

diff --git a/src/Math/Interval/FloatIntervalSet.php b/src/Math/Interval/FloatIntervalSet.php
index 7e9c5aed..60dd40c7 100644
--- a/src/Math/Interval/FloatIntervalSet.php
+++ b/src/Math/Interval/FloatIntervalSet.php
@@ -190,6 +190,11 @@ public function subtractIntervals(FloatInterval ...$intervals): self
         return new static($results);
     }
 
+    public function invert(): self
+    {
+        return (new static([FloatInterval::all()]))->subtract($this);
+    }
+
     /**
      * Intersect with another set of intervals.
      * @param self $set
diff --git a/src/Math/Interval/IntIntervalSet.php b/src/Math/Interval/IntIntervalSet.php
index b4940166..0bfefd88 100644
--- a/src/Math/Interval/IntIntervalSet.php
+++ b/src/Math/Interval/IntIntervalSet.php
@@ -190,6 +190,11 @@ public function subtractIntervals(IntInterval ...$intervals): self
         return new static($results);
     }
 
+    public function invert(): self
+    {
+        return (new static([IntInterval::all()]))->subtract($this);
+    }
+
     /**
      * Intersect with another set of intervals.
      * @param self $set
diff --git a/src/Time/Interval/DateIntervalSet.php b/src/Time/Interval/DateIntervalSet.php
index 4290c497..c3ce1176 100644
--- a/src/Time/Interval/DateIntervalSet.php
+++ b/src/Time/Interval/DateIntervalSet.php
@@ -249,6 +249,11 @@ public function subtractIntervals(DateInterval ...$intervals): self
         return new static($results);
     }
 
+    public function invert(): self
+    {
+        return (new static([DateInterval::all()]))->subtract($this);
+    }
+
     /**
      * Intersect with another set of intervals.
      * @param self $set
diff --git a/src/Time/Interval/NightIntervalSet.php b/src/Time/Interval/NightIntervalSet.php
index 75e9a00e..2a87afe6 100644
--- a/src/Time/Interval/NightIntervalSet.php
+++ b/src/Time/Interval/NightIntervalSet.php
@@ -258,6 +258,11 @@ public function subtractIntervals(NightInterval ...$intervals): self
         return new static($results);
     }
 
+    public function invert(): self
+    {
+        return (new static([NightInterval::all()]))->subtract($this);
+    }
+
     /**
      * Intersect with another set of intervals.
      * @param self $set
diff --git a/src/Time/Interval/TimeIntervalSet.php b/src/Time/Interval/TimeIntervalSet.php
index a4be2245..0870ec62 100644
--- a/src/Time/Interval/TimeIntervalSet.php
+++ b/src/Time/Interval/TimeIntervalSet.php
@@ -208,6 +208,11 @@ public function subtractIntervals(TimeInterval ...$intervals): self
         return new static($results);
     }
 
+    public function invert(): self
+    {
+        return (new static([TimeInterval::all()]))->subtract($this);
+    }
+
     /**
      * Intersect with another set of intervals.
      * @param self $set