[to_c_lower_upper.cc] clang-format (#1163)

* move print_freestanding to impl.h

* impl

* [print] move print_freestanding to a seperate directory to revamp it

* special

* add license and license-zhCN.txt for anti-tivoization

* [core] Fix warnings for codecvt for clang for charxx_t

* Add trim to string
Overhual entire char_category apis

Todo. Implement trim for string_view

* add __cpp_static_call_operator to char_category_traits.h

* [edit] add string_view for trim, trim.cc string.h

* [string] trim_subview_prefix should have
fast_io::containers::null_terminated

* [char_category] add to_c_lower upper ranges support

* [char_category_traits.h] fix to_c_halfwidth

* fix issues with shadow

* [nt] fix shadow in alpc_nt.h

* [char_category] fix api before C++23

* [to_c_lower_upper.cc] clang-format

Author: trcrsired

tests/0026.container/0004.string/to_c_lower_upper.cc

@@ -3,28 +3,28 @@
 
 int main()
 {
-    ::fast_io::u8string ustr(u8"abcdefwegeABCDwgwasfsa 325235 fhasdfhsdh"), 
-                        ustr_upper(ustr), 
-                        ustr_lower(ustr),
-                        numbers(u8"1234567890"), 
-                        symbols(u8"!@#$%^&*()"), 
-                        empty;
+	::fast_io::u8string ustr(u8"abcdefwegeABCDwgwasfsa 325235 fhasdfhsdh"),
+		ustr_upper(ustr),
+		ustr_lower(ustr),
+		numbers(u8"1234567890"),
+		symbols(u8"!@#$%^&*()"),
+		empty;
 
-    // Apply transformations
-    ::fast_io::char_category::ranges::to_c_upper(ustr_upper);
-    ::fast_io::char_category::ranges::to_c_lower(ustr_lower);
-    ::fast_io::char_category::ranges::to_c_upper(numbers);
-    ::fast_io::char_category::ranges::to_c_upper(symbols);
-    ::fast_io::char_category::ranges::to_c_upper(empty);
+	// Apply transformations
+	::fast_io::char_category::ranges::to_c_upper(ustr_upper);
+	::fast_io::char_category::ranges::to_c_lower(ustr_lower);
+	::fast_io::char_category::ranges::to_c_upper(numbers);
+	::fast_io::char_category::ranges::to_c_upper(symbols);
+	::fast_io::char_category::ranges::to_c_upper(empty);
 
-    // Print all results in one println
-    ::fast_io::io::println(::fast_io::u8c_stdout(), 
-        u8"Original: ", ustr, 
-        u8"\nUppercase: ", ustr_upper, 
-        u8"\nLowercase: ", ustr_lower, 
-        u8"\nNumbers (unchanged): ", numbers, 
-        u8"\nSymbols (unchanged): ", symbols, 
-        u8"\nEmpty string: ", empty);
+	// Print all results in one println
+	::fast_io::io::println(::fast_io::u8c_stdout(),
+						   u8"Original: ", ustr,
+						   u8"\nUppercase: ", ustr_upper,
+						   u8"\nLowercase: ", ustr_lower,
+						   u8"\nNumbers (unchanged): ", numbers,
+						   u8"\nSymbols (unchanged): ", symbols,
+						   u8"\nEmpty string: ", empty);
 
-    return 0;
+	return 0;
 }