WIP: Use charconv functions

CMakeLists.txt

@@ -197,6 +197,16 @@ if (NOT ENABLE_THREAD_LOCAL)
         PROPERTY COMPILE_DEFINITIONS ${META_PROJECT_VARNAME}_NO_THREAD_LOCAL)
 endif ()
 
+# configure use of charconv
+option(ENABLE_CHARCONV "enables use charconv for integer conversions" ON)
+option(ENABLE_CHARCONV_FP "enables use charconv for floating point conversions" ON)
+if (ENABLE_CHARCONV)
+    list(APPEND META_PUBLIC_COMPILE_DEFINITIONS ${META_PROJECT_VARNAME}_ENABLE_CHARCONV)
+endif ()
+if (ENABLE_CHARCONV_FP)
+    list(APPEND META_PUBLIC_COMPILE_DEFINITIONS ${META_PROJECT_VARNAME}_ENABLE_CHARCONV_FP)
+endif ()
+
 # include modules to apply configuration
 include(BasicConfig)
 include(WindowsResources)

conversion/stringconversion.h

@@ -25,6 +25,10 @@
 #include <ranges>
 #endif
 
+#if defined(CPP_UTILITIES_ENABLE_CHARCONV) || defined(CPP_UTILITIES_ENABLE_CHARCONV_FP)
+#include <charconv>
+#endif
+
 namespace CppUtilities {
 
 /*!
@@ -442,6 +446,7 @@ template <typename IntegralType, class StringType = std::string, typename BaseTy
     Traits::EnableIf<std::is_integral<IntegralType>, std::is_signed<IntegralType>> * = nullptr>
 StringType numberToString(IntegralType number, BaseType base = 10)
 {
+
     const bool negative = number < 0;
     std::size_t resSize;
     if (negative) {
@@ -537,7 +542,7 @@ IntegralType stringToNumber(const StringType &string, BaseType base = 10)
  */
 template <typename IntegralType, class StringType, typename BaseType = IntegralType,
     Traits::EnableIf<std::is_integral<IntegralType>, std::is_signed<IntegralType>, Traits::Not<std::is_scalar<std::decay_t<StringType>>>> * = nullptr>
-IntegralType stringToNumber(const StringType &string, IntegralType base = 10)
+IntegralType stringToNumber(const StringType &string, BaseType base = 10)
 {
     auto i = string.begin();
     auto end = string.end();
@@ -581,10 +586,10 @@ FloatingType stringToNumber(const StringType &string, int base = 10)
         return result;
     }
     std::string errorMsg;
-    errorMsg.reserve(42 + string.size());
+    errorMsg.reserve(48 + string.size());
     errorMsg += "The string \"";
     errorMsg += string;
-    errorMsg += "\" is no valid floating number.";
+    errorMsg += "\" is no valid floating point number.";
     throw ConversionException(errorMsg);
 }