From f25a47f022e45137149a0726a73cbd8b1fda4f04 Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 25 Feb 2023 03:23:07 +0000
Subject: Helpers to create container instances from ranges

---
 lib/collections.hpp | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'lib')

diff --git a/lib/collections.hpp b/lib/collections.hpp
index 31e5ab8..18e6147 100644
--- a/lib/collections.hpp
+++ b/lib/collections.hpp
@@ -15,6 +15,8 @@ concept SequentialCollection = requires(T c) {
 									   c.data()
 									   } -> std::same_as<const E *>;
 							   };
+template<typename T>
+concept IterableCollection = std::is_same_v<decltype(std::declval<T>().begin()), decltype(std::declval<T>().end())>;
 
 template<typename T, std::size_t first, std::size_t second>
 constexpr std::array<T, first + second>
@@ -102,3 +104,17 @@ vectorOfN(std::integral auto N, unsigned int start = {}, unsigned int step = 1)
 	});
 	return v;
 }
+
+template<template<typename...> typename Rtn = std::vector, IterableCollection In>
+auto
+materializeRange(In && in)
+{
+	return Rtn(in.begin(), in.end());
+}
+
+template<template<typename...> typename Rtn = std::vector, typename In>
+auto
+materializeRange(const std::pair<In, In> & in)
+{
+	return Rtn(in.first, in.second);
+}
-- 
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