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tjp/core/string/join.hpp

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+// License: Modified MIT (NON-AI)
+// See the LICENSE file in the root directory for license information.
+// Copyright 2025 Timothy Prepscius
+
+#pragma once
+
+#include "../iterators/is_first.hpp"
+#include "to_string.hpp"
+#include <string>
+
+namespace tjp::core {
+
+template <typename V, typename T>
+void join_(std::string &result, is_first &first, const V &delimiter, const T & sv)
+{
+	for (auto &s : sv)
+	{
+		if (!first.check())
+			result += delimiter;
+			
+		result.insert(result.end(), s.begin(), s.end());
+	}
+}
+
+template <typename V, typename U, typename T>
+void join_(std::string &result, is_first &first, const V &delimiter, const U &u, const T & sv)
+{
+	for (auto &s_ : sv)
+	{
+		auto s = u(s_);
+		if (!first.check())
+			result += delimiter;
+			
+		result.insert(result.end(), s.begin(), s.end());
+	}
+}
+
+template <typename V, typename ... T>
+std::string join(const V &delimiter, T&& ... t)
+{
+	std::string result;
+	is_first first;
+	
+	((join_(result, first, delimiter, t)),...) ;
+
+	return result;
+}
+
+template <typename V, typename ... T>
+std::string join_values(const V &delimiter, T&& ... t)
+{
+	std::string result;
+	is_first first;
+	
+	auto u = [](auto &v) { return to_string(v); };
+	((join_(result, first, delimiter, u, t)),...) ;
+
+	return result;
+}
+
+template <typename V, typename U, typename ... T>
+std::string join_with(const V &delimiter, U &&u, T&& ... t)
+{
+	std::string result;
+	is_first first;
+	
+	((join_(result, first, delimiter, u, t)),...) ;
+
+	return result;
+}
+
+} // namespace