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Better SFINAE in JSON encoders

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This commit is contained in:
Emil Dotchevski
2026-02-01 13:56:15 -05:00
parent 48a7f72301
commit 710797a4a7
5 changed files with 49 additions and 24 deletions
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16
test/boost_json_encoder_test.cpp
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@@ -17,6 +17,7 @@
#include <iomanip>
#include <iostream>
#include <stdexcept>
#include <vector>
#if BOOST_LEAF_CFG_STD_SYSTEM_ERROR
# include <system_error>
#endif
@@ -76,6 +77,11 @@ struct my_error
}
};
struct my_error_with_vector
{
std::vector<int> value;
};
leaf::result<void> fail()
{
return BOOST_LEAF_NEW_ERROR(
@@ -87,6 +93,7 @@ leaf::result<void> fail()
42,
my_error<1>{1, "error one"},
my_error<2>{2, "error two"},
my_error_with_vector{{10, 20, 30}},
leaf::e_errno{ENOENT},
leaf::e_api_function{"my_api_function"} );
}
@@ -103,6 +110,7 @@ void leaf_throw()
42,
my_error<1>{1, "error one"},
my_error<2>{2, "error two"},
my_error_with_vector{{10, 20, 30}},
leaf::e_errno{ENOENT},
leaf::e_api_function{"my_api_function"} );
}
@@ -118,6 +126,7 @@ void throw_()
42,
my_error<1>{1, "error one"},
my_error<2>{2, "error two"},
my_error_with_vector{{10, 20, 30}},
leaf::e_errno{ENOENT},
leaf::e_api_function{"my_api_function"} );
throw my_exception{};
@@ -167,6 +176,13 @@ void check_diagnostic_details(boost::json::value const & j, bool has_source_loca
BOOST_TEST_EQ(boost::json::value_to<int>(e2j.at("code")), 2);
BOOST_TEST_EQ(boost::json::value_to<std::string>(e2j.at("message")), "error two");
auto const & vj = j.at("my_error_with_vector");
BOOST_TEST(vj.is_array());
BOOST_TEST_EQ(vj.as_array().size(), 3);
BOOST_TEST_EQ(boost::json::value_to<int>(vj.as_array()[0]), 10);
BOOST_TEST_EQ(boost::json::value_to<int>(vj.as_array()[1]), 20);
BOOST_TEST_EQ(boost::json::value_to<int>(vj.as_array()[2]), 30);
auto const & ej = j.at("boost::leaf::e_errno");
BOOST_TEST_EQ(boost::json::value_to<int>(ej.at("errno")), ENOENT);
BOOST_TEST(!boost::json::value_to<std::string>(ej.at("strerror")).empty());