What is i+++ increment in c++

Question

can anyone tell me what is the process of i+++ increment in c++.

Answer 1

It is a syntax error.

Using the maximum munching rule i+++ is tokenized as:

i ++ +

The last + is a binary addition operator. But clearly it does not have two operands which results in parser error.

EDIT:

Question from the comment: Can we have i++++j ?

It is tokenized as:

i ++ ++ j

which again is a syntax error as ++ is a unary operator.

On similar lines i+++++j is tokenized by the scanner as:

i++ ++ + j

which is same as ((i++)++) + j which again in error as i++ is not a lvalue and using ++ on it is not allowed.