🙃 This is honestly the most I can handle right now.

CMakeLists.txt

@@ -147,19 +147,19 @@ if (NOT TARGET Iconv::Iconv AND ZTD_TEXT_USE_LIBICONV)
 endif()
 # define generator expressions for each moment
 string(CONCAT ztd-text-libiconv-define
-	$<IF:$<BOOL:ZTD_TEXT_USE_LIBICONV>,
+	$<IF:$<BOOL:${ZTD_TEXT_USE_LIBICONV}>,
 		ZTD_LIBICONV=1,
 		ZTD_LIBICONV=0
 	>
 )
 string(CONCAT ztd-text-libiconv-load-define
-	$<IF:$<AND:$<BOOL:Iconv_FOUND>,$<BOOL:ZTD_TEXT_USE_LIBICONV>>,
+	$<IF:$<AND:$<BOOL:${Iconv_FOUND}>,$<BOOL:${ZTD_TEXT_USE_LIBICONV}>>,
 		ZTD_LIBICONV_LOAD=0,
 		ZTD_LIBICONV_LOAD=1
 	>
 )
 string(CONCAT ztd-text-libiconv-header-define
-	$<IF:$<AND:$<BOOL:Iconv_FOUND>,$<BOOL:ZTD_TEXT_USE_LIBICONV>>,
+	$<IF:$<AND:$<BOOL:${Iconv_FOUND}>,$<BOOL:${ZTD_TEXT_USE_LIBICONV}>>,
 		ZTD_ICONV_H=1,
 		ZTD_ICONV_H=0
 	>
@@ -172,7 +172,7 @@ string(CONCAT ztd-text-libiconv-dl
 )
 string(CONCAT ztd-text-static-libiconv-define
 	$<IF:
-		$<AND:$<BOOL:Iconv_FOUND>, $<BOOL:ZTD_TEXT_USE_STATIC_LIBICONV>,
+		$<AND:$<BOOL:${Iconv_FOUND}>, $<BOOL:${ZTD_TEXT_USE_STATIC_LIBICONV}>,
 			$<STREQUAL:
 				$<$<BOOL:$<TARGET_NAME_IF_EXISTS:Iconv::Iconv>>:$<TARGET_PROPERTY:Iconv::Iconv,TYPE>>,
 				STATIC_LIBRARY

include/ztd/text/detail/encoding_name.hpp

@@ -41,8 +41,10 @@
 #include <ztd/text/encoding_scheme.hpp>
 #include <ztd/text/ascii.hpp>
 #include <ztd/text/no_encoding.hpp>
+#include <ztd/text/iconv_names.hpp>
 
 #include <ztd/idk/detail/encoding_name.hpp>
+#include <ztd/idk/type_traits.hpp>
 
 #include <string_view>
 
@@ -90,6 +92,26 @@ namespace ztd { namespace text {
 			}
 		}
 
+		template <typename _CodePoint>
+		c_string_view __platform_utf_name() {
+			constexpr ::std::size_t __bits = sizeof(_CodePoint) * CHAR_BIT;
+			if constexpr (__bits <= 8) {
+				return iconv_utf8_name;
+			}
+			else if constexpr (__bits <= 16) {
+				return iconv_utf16_name;
+			}
+			else if constexpr (__bits <= 32) {
+				return iconv_utf32_name;
+			}
+			else {
+				static_assert(always_false_v<_CodePoint>,
+					"[ztd.text] There is no good known default platform encoding for the given bit size in this "
+					"platform. File a bug and tell us about your needs!");
+				return iconv_locale_name;
+			}
+		}
+
 	} // namespace __txt_detail
 
 	ZTD_TEXT_INLINE_ABI_NAMESPACE_CLOSE_I_

include/ztd/text/iconv_names.hpp

@@ -0,0 +1,58 @@
+// =============================================================================
+//
+// ztd.text
+// Copyright © 2021 JeanHeyd "ThePhD" Meneide and Shepherd's Oasis, LLC
+// Contact: opensource@soasis.org
+//
+// Commercial License Usage
+// Licensees holding valid commercial ztd.text licenses may use this file in
+// accordance with the commercial license agreement provided with the
+// Software or, alternatively, in accordance with the terms contained in
+// a written agreement between you and Shepherd's Oasis, LLC.
+// For licensing terms and conditions see your agreement. For
+// further information contact opensource@soasis.org.
+//
+// Apache License Version 2 Usage
+// Alternatively, this file may be used under the terms of Apache License
+// Version 2.0 (the "License") for non-commercial use; you may not use this
+// file except in compliance with the License. You may obtain a copy of the
+// License at
+//
+//		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// ============================================================================>
+
+#pragma once
+
+#ifndef ZTD_TEXT_ICONV_NAMES_HPP
+#define ZTD_TEXT_ICONV_NAMES_HPP
+
+#include <ztd/text/version.hpp>
+
+#include <ztd/text/c_string_view.hpp>
+
+#include <ztd/idk/endian.hpp>
+
+#include <ztd/prologue.hpp>
+
+namespace ztd { namespace text {
+	ZTD_TEXT_INLINE_ABI_NAMESPACE_OPEN_I_
+
+	inline constexpr c_string_view iconv_locale_name      = "";
+	inline constexpr c_string_view iconv_wide_locale_name = "wchar_t";
+	inline constexpr c_string_view iconv_utf8_name        = "UTF-8";
+	inline constexpr c_string_view iconv_utf16_name       = (endian::native == endian::big ? "UTF-16BE" : "UTF-16LE");
+	inline constexpr c_string_view iconv_utf32_name       = (endian::native == endian::big ? "UTF-32BE" : "UTF-32LE");
+
+	ZTD_TEXT_INLINE_ABI_NAMESPACE_CLOSE_I_
+}} // namespace ztd::text
+
+#include <ztd/epilogue.hpp>
+
+#endif // ZTD_TEXT_ICONV_NAMES_HPP

include/ztd/text/impl/execution_iconv.hpp

@@ -36,6 +36,7 @@
 #include <ztd/text/version.hpp>
 
 #include <ztd/text/basic_iconv.hpp>
+#include <ztd/text/iconv_names.hpp>
 
 #if ZTD_IS_ON(ZTD_LIBICONV_I_)
 
@@ -51,7 +52,7 @@ namespace ztd { namespace text {
 			using __base_t = basic_iconv<char, unicode_code_point>;
 
 		public:
-			__execution_iconv() noexcept : __base_t("", "UTF-32") {
+			__execution_iconv() noexcept : __base_t(iconv_locale_name.base(), iconv_utf32_name.base()) {
 			}
 		};
 

include/ztd/text/impl/wide_execution_iconv.hpp

@@ -36,6 +36,7 @@
 #include <ztd/text/version.hpp>
 
 #include <ztd/text/basic_iconv.hpp>
+#include <ztd/text/iconv_names.hpp>
 
 #if ZTD_IS_ON(ZTD_LIBICONV_I_)
 
@@ -51,7 +52,7 @@ namespace ztd { namespace text {
 			using __base_t = basic_iconv<wchar_t, unicode_code_point>;
 
 		public:
-			__wide_execution_iconv() noexcept : __base_t("wchar_t", "UTF-32") {
+			__wide_execution_iconv() noexcept : __base_t(iconv_wide_locale_name.base(), iconv_utf32_name.base()) {
 			}
 		};
 

tests/iconv/source/iconv.transcode.cpp

@@ -62,28 +62,4 @@ TEST_CASE("text/transcode/iconv", "iconv transcode can roundtrip") {
 			check_roundtrip(encoding, ztd::tests::w_unicode_sequence_truth_native_endian);
 		}
 	}
-	SECTION("utf8") {
-		ztd::text::basic_iconv<ztd::uchar8_t> encoding("UTF-8");
-		check_roundtrip(encoding, ztd::tests::u8_basic_source_character_set);
-
-		if (ztd::text::contains_unicode_encoding(encoding)) {
-			check_roundtrip(encoding, ztd::tests::u8_unicode_sequence_truth_native_endian);
-		}
-	}
-	SECTION("utf16") {
-		ztd::text::basic_iconv<char16_t> encoding("UTF-16");
-		check_roundtrip(encoding, ztd::tests::u16_basic_source_character_set);
-
-		if (ztd::text::contains_unicode_encoding(encoding)) {
-			check_roundtrip(encoding, ztd::tests::u16_unicode_sequence_truth_native_endian);
-		}
-	}
-	SECTION("utf32") {
-		ztd::text::basic_iconv<char32_t> encoding("UTF-32");
-		check_roundtrip(encoding, ztd::tests::u32_basic_source_character_set);
-
-		if (ztd::text::contains_unicode_encoding(encoding)) {
-			check_roundtrip(encoding, ztd::tests::u32_unicode_sequence_truth_native_endian);
-		}
-	}
 }

tests/inclusion/source/ztd/text/iconv_names.cpp

@@ -0,0 +1,31 @@
+// =============================================================================
+//
+// ztd.text
+// Copyright © 2021 JeanHeyd "ThePhD" Meneide and Shepherd's Oasis, LLC
+// Contact: opensource@soasis.org
+//
+// Commercial License Usage
+// Licensees holding valid commercial ztd.text licenses may use this file in
+// accordance with the commercial license agreement provided with the
+// Software or, alternatively, in accordance with the terms contained in
+// a written agreement between you and Shepherd's Oasis, LLC.
+// For licensing terms and conditions see your agreement. For
+// further information contact opensource@soasis.org.
+//
+// Apache License Version 2 Usage
+// Alternatively, this file may be used under the terms of Apache License
+// Version 2.0 (the "License") for non-commercial use; you may not use this
+// file except in compliance with the License. You may obtain a copy of the
+// License at
+//
+//		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+// ============================================================================>
+
+#include <ztd/text/iconv_names.hpp>