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# 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, -inf, nan):
try:
ans = f(x)
print('%.4f' % ans)
except ValueError:
print(name, 'ValueError')
except OverflowError:
print(name, 'OverflowError')
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