What does this incremental syntax mean? [duplicate]
This question already has an answer here: scope resolution operator without a scope 6 answers I came across a line of code that is quite confusing to me. I tried searching but wasn't sure what to even search for. The line is as follows: int i = ++::i; I am lost to whether this line evaluates to: int i+= i ; Any help would be appreciated
In int i = ++::i; the :: is there to tell the compiler use the i from the global scope. Without it the compiler is going to use the i you just declared which is undefined behavior. For more on that see Using newly declared variable in initialization (int x = x+1)?
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