reserved

In this page , Microsoft says that XML reserved characters (and their entity) are the following ones: > > < < & & % % But in this other page , I found that also ' is a reserved character (and its entity is &apos; ). Can someone indicate me some official reference in which are listed all and only the XML reserved characters? According to the XML spec , the only characters that must be escaped when used as character content rather than markup are & (as & , & or & ) and < (as < , < or < ), plus > when it is part of the sequence ]]> . In addition, single quotes must be escaped (typically as &apos;

#include <iostream> #include <cmath> /* Intentionally incorrect abs() which seems to override std::abs() */ int abs(int a) { return a > 0? -a : a; } int main() { int a = abs(-5); int b = std::abs(-5); std::cout<< a << std::endl << b << std::endl; return 0; } I expected that the output will be -5 and 5 , but the output is the -5 and -5 . I wonder why this case will happen? Does it have anything to do with the use of std or what? The language specification allows implementations to implement <cmath> by declaring (and defining) the standard functions in global namespace and then bringing them

Does anyone know if there is any builtin python method that will check if something is a valid python variable name, INCLUDING a check against reserved keywords? (so, ie, something like 'in' or 'for' would fail...) Failing that, does anyone know of where I can get a list of reserved keywords (ie, dyanamically, from within python, as opposed to copy-and-pasting something from the online docs)? Or, have another good way of writing your own check? Surprisingly, testing by wrapping a setattr in try/except doesn't work, as something like this: setattr(myObj, 'My Sweet Name!', 23) ...actually works!

I need to design a class where one property name has to be return , but when I create a property name like return then I get an error. After some research I found out that one can use a reserved keyword as a property or variable name by adding a @ prefix in C#, or by enclosing it in square brackets [] in VB.NET. For example: var @class = new object(); So here is my class design code. public class Person { string _retVal; public string @return { get { return _retVal; } set { _retVal = value; } } } ... Person p = new Person(); p.@return = "hello"; Now I am not getting any error, but when I try

I inherited a database loaded into DocumentDB, where field name happens to be "Value". Example of my structure is: { ... "Alternates": [ "Type": "ID", "Value" : "NOCALL" ] } when I query (using documentDB's SQL), trying to get back all documents where Alternates.Value = "NOCALL", I get syntax error near "Value" error . If I query for Type = "ID", it is all fine. Seems that the word Value, having a special meaning on DocumentDB is causing an issue. Putting punctuation (e.g. quotes/double quotes) around "Value" does not seem to help. Any suggestion on how to resolve this will be much appreciated

I'd like to create a function called "new" and a class called "case". Can I do that in PHP? No , you can't . Thank god. Actually, while defining such a method results in a parse error, using it does not, which allows some kind of workarounds: class A { function __call($method, $args) { if ($method == 'new') { // ... } } } $a = new A; $a->new(); // works! A related feature request dating back to 2004 is still open. Edit January 2016 As of PHP 7, it is now possible to name your methods using keywords that were restricted so far, thanks to the Context Sensitive Lexer : class Foo { public function