# Tests domain errors in special math functions

try:
 import math
 math.erf
except (ImportError, AttributeError):
 print("SKIP")
 raise SystemExit

inf = float('inf')
nan = float('nan')

# single argument functions
for name, f, args in (
 ('expm1', math.exp, ()),
 ('log2', math.log2, (-1, 0)),
 ('log10', math.log10, (-1, 0)),
 ('sinh', math.sinh, ()),
 ('cosh', math.cosh, ()),
 ('tanh', math.tanh, ()),
 ('asinh', math.asinh, ()),
 ('acosh', math.acosh, (-1, 0.9, 1)),
 ('atanh', math.atanh, (-1, 1)),
 ('erf', math.erf, ()),
 ('erfc', math.erfc, ()),
 ('gamma', math.gamma, (-2, -1, 0, 1)),
 ('lgamma', math.lgamma, (-2, -1, 0, 1)),
 ):
 for x in args + (inf, nan):
 try:
 ans = f(x)
 print('%.4f' % ans)
 except ValueError:
 print(name, 'ValueError')
 except OverflowError:
 print(name, 'OverflowError')