From 3791c8b8ee020153c7e1315a71293b92a732c6e5 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Mon, 24 Feb 2020 14:39:08 +1100
Subject: [PATCH] iterator: add methods to conform `iota` to LegacyIterator

---
 iterator/iota.hpp | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/iterator/iota.hpp b/iterator/iota.hpp
index dad86f0c..4ade8e1f 100644
--- a/iterator/iota.hpp
+++ b/iterator/iota.hpp
@@ -24,7 +24,19 @@ namespace cruft::iterator {
     template <typename ValueT = std::size_t>
     class iota {
     public:
+        class iterator;
+
         using value_type = ValueT;
+        using reference = ValueT&;
+        using const_reference = ValueT const&;
+        using const_iterator = iterator;
+        using iterator = iterator;
+        using difference_type = ssize_t;
+        using size_type = size_t;
+
+        iota ()
+            : m_total {}
+        { ; }
 
         iota (value_type _total)
           : m_total (_total)
@@ -68,7 +80,18 @@ namespace cruft::iterator {
 
         iterator   begin (void) const { return iterator {}; }
         iterator   end   (void) const { return iterator {m_total}; }
+
+        iterator cbegin (void) const { return begin (); }
+        iterator cend   (void) const { return cend (); }
+
         value_type size  (void) const { return m_total; }
+        value_type max_size  (void) const { return std::numeric_limits<size_type>::max (); }
+        bool empty  (void) const noexcept { return m_total == 0; }
+
+        void swap (iota &other) { std::swap (m_total, other); }
+
+        constexpr bool operator== (iota const &rhs) const noexcept { return m_total == rhs.m_total; }
+        constexpr bool operator!= (iota const &rhs) const noexcept { return m_total == rhs.m_total; }
 
     private:
         value_type m_total;