string-literals

Is it possible to concat two string literals using a constexpr ? Or put differently, can one eliminate macros in code like: #define nl(str) str "\n" int main() { std::cout << nl("usage: foo") nl("print a message") ; return 0; } Update : There is nothing wrong with using "\n" , however I would like to know whether one can use constexpr to replace those type of macros. Yes, it is entirely possible to create compile-time constant strings, and manipulate them with constexpr functions and even operators. However, The compiler is not required to perform constant initialization of any object other

Consider this code: const char* someFun() { // ... some stuff return "Some text!!" } int main() { { // Block: A const char* retStr = someFun(); // use retStr } } In the function someFun() , where is "Some text!!" stored (I think it may be in some static area of ROM) and what is its scope lifetime? Will the memory pointed by retStr be occupied throughout the program or be released once the block A exits? The C++ Standard does not say where string literals should be stored. It does however guarantee that their lifetime is the lifetime of the program. Your code is therefore valid. The "Some text!

This question already has an answer here: “#include” a text file in a C program as a char[] 16 answers I have a C++ source file and a Python source file. I'd like the C++ source file to be able to use the contents of the Python source file as a big string literal. I could do something like this: char* python_code = " #include "script.py" " But that won't work because there need to be \'s at the end of each line. I could manually copy and paste in the contents of the Python code and surround each line with quotes and a terminating \n, but that's ugly. Even though the python source is going to

I have the following output created using a printf() statement: printf("She said time flies like an arrow, but fruit flies like a banana."); but I want to put the actual quotation in double-quotes, so the output is She said "time flies like an arrow, but fruit flies like a banana". without interfering with the double-quotes used to wrap the string literal in the printf() statement. How can I do this? Mark Byers Escape the quotes with backslashes: printf("She said \"time flies like an arrow, but fruit flies like a banana\"."); There are special escape characters that you can use in string

I want to convert below string to an array in javascript. {a:12, b:c, foo:bar} How do I convert this string into array of objects? Any cool idea? alcuadrado I think that the best way of doing this, as Douglas Crockford (one of the biggests gurus of JavaScript) suggests in here is using the JSON native parser , as it is not only faster than the eval(), it's also more secure. Native JSON parser is already available in: Firefox 3.5+ IE 8+ Opera 10.5+ Safari Safari 4.0.3+ Chrome (don't know which version) And Crockford has made a safe fallback in javascript, called json2.js , which is an adaption