Test gmpy2_plus.c
=================

>>> import gmpy2
>>> from gmpy2 import mpz, mpq, mpfr, mpc
>>> from fractions import Fraction

>>> ctx = gmpy2.get_context()
>>> ctx.plus(5)
mpz(5)
>>> ctx.plus(-5)
mpz(-5)
>>> ctx.plus(Fraction(4,5))
mpq(4,5)
>>> ctx.plus(4.5)
mpfr('4.5')
>>> ctx.plus(complex(5.2,5))
mpc('5.2000000000000002+5.0j')
>>> ctx.plus(mpz(421))
mpz(421)
>>> ctx.plus('invalid')
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: plus() argument type not supported
>>> ctx.plus()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: plus() requires 1 argument.
>>> + mpz(421)
mpz(421)
>>> + mpq('4/5')
mpq(4,5)
>>> + mpfr('inf')
mpfr('inf')
>>> + mpc(65.0, 45)
mpc('65.0+45.0j')