Test constructors via special methods
=====================================

>>> from gmpy2 import mpz, mpq, mpfr, mpc
>>> from supportclasses import *

Test mpz conversion
-------------------

>>> x = mpz(a)
>>> isinstance(x, mpz)
True
>>> x == 1
True
>>> mpz(b)
Traceback (most recent call last):
...
TypeError: object of type 'str' can not be interpreted as mpz
>>> mpz(c)
Traceback (most recent call last):
...
TypeError: mpz() requires numeric or string argument
>>> 1
1

Test mpq conversion
-------------------

>>> x = mpq(a)
>>> isinstance(x, mpq)
True
>>> 2*x == 3
True
>>> mpq(z, z)
mpq(1,1)
>>> class Three:
...     def __mpz__(self): return mpz(3)
...
>>> mpq(z, Three())
mpq(2,3)
>>> mpq(b)
Traceback (most recent call last):
...
TypeError: object of type 'str' can not be interpreted as mpq
>>> mpq(c)
Traceback (most recent call last):
...
TypeError: mpq() requires numeric or string argument
>>> 1
1

Test mpfr conversion
--------------------

>>> x = mpfr(a)
>>> isinstance(x, mpfr)
True
>>> x == 1.5
True
>>> mpfr(b)
Traceback (most recent call last):
...
TypeError: object of type 'str' can not be interpreted as mpc
>>> mpfr(c)
Traceback (most recent call last):
...
TypeError: mpfr() requires numeric or string argument
>>> 1
1

Test mpc conversion
--------------------

>>> x = mpc(a)
>>> isinstance(x, mpc)
True
>>> x == 42+67j
True

>>> mpc(b)
Traceback (most recent call last):
...
TypeError: object of type 'str' can not be interpreted as mpc

>>> mpc(c)
Traceback (most recent call last):
...
TypeError: mpc() requires numeric or string argument
>>> 1
1

Test special methods raising errors
--------------------
>>> mpz(d)
Traceback (most recent call last):
...
TypeError
>>> mpq(d)
Traceback (most recent call last):
...
TypeError
>>> mpfr(d)
Traceback (most recent call last):
...
TypeError
>>> mpc(d)
Traceback (most recent call last):
...
TypeError
>>> 1
1