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Avoid name ambiguity.

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[SVN r65128]
This commit is contained in:
Paul A. Bristow
2010-08-30 09:30:55 +00:00
parent 8c1ed33bb7
commit 80e2fabfef
2 changed files with 37 additions and 27 deletions
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39
example/error_policy_example.cpp
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@@ -1,6 +1,6 @@
// example_policy_handling.cpp
// Copyright Paul A. Bristow 2007.
// Copyright Paul A. Bristow 2007, 2010.
// Copyright John Maddock 2007.
// Use, modification and distribution are subject to the
@@ -14,13 +14,17 @@
// for student's t distribution CDF,
// and catching the exception.
// See error_handling_policies for more examples.
// See error_handling_policies.cpp for more examples.
// Boost
#include <boost/math/distributions/students_t.hpp>
using boost::math::students_t_distribution; // Probability of students_t(df, t).
using boost::math::students_t; // Probability of students_t(df, t) convenience typedef for double.
using boost::math::policies::policy;
using boost::math::policies::domain_error;
using boost::math::policies::ignore_error;
// std
#include <iostream>
using std::cout;
@@ -29,16 +33,12 @@ using boost::math::students_t; // Probability of students_t(df, t) convenience
#include <stdexcept>
using std::exception;
using boost::math::policies::policy;
using boost::math::policies::domain_error;
using boost::math::policies::ignore_error;
// Define a (bad?) policy to ignore domain errors ('bad' arguments):
typedef policy<
domain_error<ignore_error>
> my_policy;
// Define my distribution with this different domain error policy:
// Define my_students_t distribution with this different domain error policy:
typedef students_t_distribution<double, my_policy> my_students_t;
int main()
@@ -49,15 +49,16 @@ int main()
try
{
cout << "Probability of ignore_error Student's t is " << cdf(my_students_t(degrees_of_freedom), t) << endl;
cout << "Probability of ignore_error Student's t is "
<< cdf(my_students_t(degrees_of_freedom), t) << endl;
cout << "Probability of default error policy Student's t is " << endl;
// BY contrast the students_t distribution default domain error policy is to throw,
// By contrast the students_t distribution default domain error policy is to throw,
cout << cdf(students_t(-1), -1) << endl; // so this will throw.
/*`
/*`
Message from thrown exception was:
Error in function boost::math::students_t_distribution<double>::students_t_distribution:
Degrees of freedom argument is -1, but must be > 0 !
*/
*/
// We could also define a 'custom' distribution
// with an "ignore overflow error policy" in a single statement:
@@ -78,11 +79,15 @@ int main()
Output:
Example error handling using Student's t function.
Probability of ignore_error Student's t is 1.#QNAN
Probability of default error policy Student's t is
Message from thrown exception was:
Error in function boost::math::students_t_distribution<double>::students_t_distribution:
Degrees of freedom argument is -1, but must be > 0 !
error_policy_example.cpp
Generating code
Finished generating code
error_policy_example.vcxproj -> J:\Cpp\MathToolkit\test\Math_test\Release\error_policy_example.exe
Example error handling using Student's t function.
Probability of ignore_error Student's t is 1.#QNAN
Probability of default error policy Student's t is
Message from thrown exception was:
Error in function boost::math::students_t_distribution<double>::students_t_distribution: Degrees of freedom argument is -1, but must be > 0 !
*/