Created
November 28, 2011 20:01
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Function return as lvalue in C++
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#include <iostream> | |
int& foo() { | |
static int pointless_static_var = 23; | |
return pointless_static_var; | |
} | |
int main(int argc, char** argv) { | |
std::cout << "foo() = 42: " << (foo() = 42) << std::endl; | |
} | |
// Outputs: | |
// foo() = 42: 42 |
Yoda. I love it!
A similar argument is applicable in JavaScript-land, where I see many (particularly nodejs) programmers use comma-first variable declaration.
var ruby = "is pretty cool"
, yoda = "not so pretty think yoda does"
This type of notation will trigger syntax errors when you make a mistake, which is preferable to creating globals accidentally.
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"constants on the left-hand side when performing equality comparisons"
Some people call those "Yoda-assignations", for obvious reasons.
My only complains are: 1) They don't look very nice and 2) You don't always have a constant to compare - you could do
foo() = bar()
. Help you Yoda will not on that one.