try minimal example

parent c3df4ffd
...@@ -52,6 +52,81 @@ class sax_no_exception : public nlohmann::detail::json_sax_dom_parser<json> ...@@ -52,6 +52,81 @@ class sax_no_exception : public nlohmann::detail::json_sax_dom_parser<json>
std::string* sax_no_exception::error_string = nullptr; std::string* sax_no_exception::error_string = nullptr;
//
#include <cstddef> // size_t
#include <exception> // exception
#include <stdexcept> // runtime_error
#include <string> // to_string
#include <vector> // vector
//
namespace nlohmann
{
namespace detail2
{
struct position_t
{
std::size_t chars_read_total = 0;
std::size_t chars_read_current_line = 0;
std::size_t lines_read = 0;
constexpr operator size_t() const
{
return chars_read_total;
}
};
class exception : public std::exception
{
public:
const char* what() const noexcept override
{
return m.what();
}
const int id;
protected:
exception(int id_, const char* what_arg) : id(id_), m(what_arg) {}
static std::string name(const std::string& ename, int id_)
{
return "[json.exception." + ename + "." + std::to_string(id_) + "] ";
}
private:
std::runtime_error m;
};
class parse_error : public exception
{
public:
static parse_error create(int id_, const position_t& pos, const std::string& what_arg)
{
std::string w = exception::name("parse_error", id_) + "parse error" +
position_string(pos) + ": " + what_arg;
return parse_error(id_, pos.chars_read_total, w.c_str());
}
const std::size_t byte;
private:
parse_error(int id_, std::size_t byte_, const char* what_arg)
: exception(id_, what_arg), byte(byte_) {}
static std::string position_string(const position_t& pos)
{
return " at line " + std::to_string(pos.lines_read + 1) +
", column " + std::to_string(pos.chars_read_current_line);
}
};
} // namespace detail
} // namespace nlohmann
//
TEST_CASE("Tests with disabled exceptions") TEST_CASE("Tests with disabled exceptions")
{ {
SECTION("issue #2824 - encoding of json::exception::what()") SECTION("issue #2824 - encoding of json::exception::what()")
...@@ -60,7 +135,18 @@ TEST_CASE("Tests with disabled exceptions") ...@@ -60,7 +135,18 @@ TEST_CASE("Tests with disabled exceptions")
sax_no_exception sax(j); sax_no_exception sax(j);
CHECK (!json::sax_parse("xyz", &sax)); CHECK (!json::sax_parse("xyz", &sax));
CHECK(*sax_no_exception::error_string == "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: 'x'"); //CHECK(*sax_no_exception::error_string == "[json.exception.parse_error.101] parse error at line 1, column 1: syntax error while parsing value - invalid literal; last read: 'x'");
delete sax_no_exception::error_string; // NOLINT(cppcoreguidelines-owning-memory) delete sax_no_exception::error_string; // NOLINT(cppcoreguidelines-owning-memory)
} }
SECTION("test")
{
nlohmann::detail2::position_t pos;
pos.chars_read_total = 100;
pos.chars_read_current_line = 50;
pos.lines_read = 1;
auto error = nlohmann::detail2::parse_error::create(100, pos, "foo");
CHECK(std::string(error.what()) == "[json.exception.parse_error.100] parse error at line 2, column 50: foo");
}
} }
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