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# tag: cpp
from libcpp.pair cimport pair
cdef extern from "cpp_template_functions_helper.h":
cdef T no_arg[T]()
cdef T one_param[T](T)
cdef pair[T, U] two_params[T, U](T, U)
cdef cppclass A[T]:
pair[T, U] method[U](T, U)
cdef T nested_deduction[T](const T*)
pair[T, U] pair_arg[T, U](pair[T, U] a)
def test_no_arg():
"""
>>> test_no_arg()
0
"""
return no_arg[int]()
def test_one_param(int x):
"""
>>> test_one_param(3)
(3, 3.0)
"""
return one_param[int](x), one_param[double](x)
def test_two_params(int x, int y):
"""
>>> test_two_params(1, 2)
(1, 2.0)
"""
return two_params[int, double](x, y)
def test_method(int x, int y):
"""
>>> test_method(5, 10)
((5, 10.0), (5.0, 10))
"""
cdef A[int] a_int
cdef A[double] a_double
return a_int.method[float](x, y), a_double.method[int](x, y)
# return a_int.method[double](x, y), a_double.method[int](x, y)
def test_simple_deduction(int x, double y):
"""
>>> test_simple_deduction(1, 2)
(1, 2.0)
"""
return one_param(x), one_param(y)
def test_more_deductions(int x, double y):
"""
>>> test_more_deductions(1, 2)
(1, 2.0)
"""
return nested_deduction(&x), nested_deduction(&y)
def test_class_deductions(pair[long, double] x):
"""
>>> test_class_deductions((1, 1.5))
(1, 1.5)
"""
return pair_arg(x)
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