How often have you had to write code like this:<\/p>\n
x = (y + 1) % 10;\r\nx = (y + 1) * (z - 1);\r\nx = (wcslen(s) + 1) * sizeof(wchar_t);\r\n<\/pre>\nSince the
+<\/code> and-<\/code> operators have such low precedence, you end up having to parenthesize them a lot, which can lead to heavily nested code that is hard to read.<\/p>\nVisual Studio 2015 RC contains a pair of experimental operators, nicknamed tadpole operators. They let you add and subtract one from an integer value without needing parentheses.<\/p>\n
x = -~y % 10;\r\nx = -~y * ~-z;\r\nx = -~wcslen(s) * sizeof(wchar_t);\r\n<\/pre>\nThey’re called tadpole operators because they look like a tadpole swimming toward or away from the value. The tilde is the tadpole’s head and the hyphen is the tail.<\/p>\n
\n\n
\n Syntax<\/th>\n Meaning<\/th>\n Mnemonic<\/th>\n<\/tr>\n \n -~y<\/code><\/td>\ny + 1<\/code><\/td>\nTadpole swimming toward a value makes it bigger<\/td>\n<\/tr>\n \n ~-y<\/code><\/td>\ny - 1<\/code><\/td>\nTadpole swimming away from a value makes it smaller<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n To enable the experimental tadpole operators, add this line to the top of your C++ file<\/p>\n
#define __ENABLE_EXPERIMENTAL_TADPOLE_OPERATORS\r\n<\/pre>\nFor example, here’s a simple program that illustrates the tadpole operators.<\/p>\n
#define __ENABLE_EXPERIMENTAL_TADPOLE_OPERATORS \r\n#include <ios>\r\n#include <iostream>\r\n#include <istream>\r\n \r\nint __cdecl main(int, char**)\r\n{\r\n int n = 3;\r\n std::cout << \"3 + 1 = \" << -~n << std::endl;\r\n std::cout << \"(3 - 1) * (3 + 1) \" << ~-n * -~n << std::endl;\r\n return 0;\r\n}\r\n<\/pre>\n