Add a comment. error: conversion from 'uint64_t' {aka 'long unsigned int'} to 'const ... In Win32, size_t is defined as unsigned int, unsigned int and size_t are all 4 bytes long. const char* chars = "Hello world"; // if your string is UTF-8 encoded, this is the shortest path : wxString mystring = wxString::FromUTF8(chars); // You can also convert from many encodings by passing the . The easy solution is to add yet another overload: Foo& operator [] (const char *foo) {} Now, calling f ["foo"] will call the new overload . golang convert int to string; golang convert string to int; Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.20.1:test (default-test) on project upload; golang string split; mongodb export entire database; golang array syntax; go add to slice; golang append to list; go convert integer to string; unzip a file in google colab Example: For instance, the conversion from type int to type long is implicit, so expressions of . It does however have a constructor taking a char, and a QChar which has an implicit conversion . I've done what I know I can do so far. ESP8266WebServer-impl.h:624:21: error: invalid conversion from 'int' to 'const __FlashStringHelper*' [-fpermissive . Overloading by Return Type in C++ - artificial::mind blog Trying to copy a Json::Value object to a long int fails to compile, because Json::Uint64 and Json::Int64 are mapped to unsigned long int and long int, respectively. The reason i am posting this short post is because just recently i realized that many people do not know how to convert an integer to a character, me included (well, but now i know). wifi - Error - invalid conversion from 'char' to 'const char*', Not ... In X64, unsigned int is a 32 bit type and size_t is a 64 bit type. It does however have a constructor taking a char, and a QChar which has an implicit conversion . ofstream() '<<' ambiguous error - C++ Forum (Page 2)