GMP: Is Self-Assessment Prohibited?
I'm using the arbitrary precision GMP library in C. All the use cases I've seen seem to avoid self-assignments like:
Syntax : void mpz_add (mpz_t rop, const mpz_t op1, const mpz_t op2)
mpz_add(a, a, b); // Assign a+b to a
Is this use permitted or should I only resort to assigning a third variable?
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There is nothing wrong with self-naming as such. In fact, the documentation is exactly the opposite. According to 3.4 Variable Conventions:
GMP allows you to use the same variable for input and output in the same call. For example, the main function for integer multiplication, mpz_mul, can be used to square x and return the result at x with
mpz_mul (x, x, x);
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