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Code Issues Releases Wiki Activity

cleanup after #191

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This commit is contained in:
Niels 2016-01-24 17:33:46 +01:00
parent ad5d1dabb2
commit 54a4139157
4 changed files with 799 additions and 421 deletions
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4
README.md
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@ -390,7 +390,7 @@ I deeply appreciate the help of the following people.
- [406345](https://github.com/406345) fixed two small warnings.
- [Glen Fernandes](https://github.com/glenfe) noted a potential portability problem in the `has_mapped_type` function.
- [Corbin Hughes](https://github.com/nibroc) fixed some typos in the contribution guidelines.
- [twelsby](https://github.com/twelsby) fixed the array subscript operator and an issue that failed the MSVC build.
- [twelsby](https://github.com/twelsby) fixed the array subscript operator, an issue that failed the MSVC build, and floating-point parsing/dumping.
Thanks a lot for helping out!
@ -407,7 +407,7 @@ $ make
$ ./json_unit "*"
===============================================================================
All tests passed (3343318 assertions in 29 test cases)
All tests passed (3343329 assertions in 29 test cases)
```
For more information, have a look at the file [.travis.yml](https://github.com/nlohmann/json/blob/master/.travis.yml).

1138
src/json.hpp
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75
src/json.hpp.re2c
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@ -5604,13 +5604,20 @@ class basic_json
case value_t::number_float:
{
// If the number is an integer then output as a fixed with with precision 1
// to output "0.0", "1.0" etc as expected for some round trip tests otherwise
// 15 digits of precision allows round-trip IEEE 754 string->double->string;
// to be safe, we read this value from std::numeric_limits<number_float_t>::digits10
if (std::fmod(m_value.number_float, 1) == 0) o << std::fixed << std::setprecision(1);
else {
o.unsetf(std::ios_base::floatfield); // std::defaultfloat not supported in gcc version < 5
// If the number is an integer then output as a fixed with with
// precision 1 to output "0.0", "1.0" etc as expected for some
// round trip tests otherwise 15 digits of precision allows
// round-trip IEEE 754 string->double->string; to be safe, we
// read this value from
// std::numeric_limits<number_float_t>::digits10
if (std::fmod(m_value.number_float, 1) == 0)
{
o << std::fixed << std::setprecision(1);
}
else
{
// std::defaultfloat not supported in gcc version < 5
o.unsetf(std::ios_base::floatfield);
o << std::setprecision(std::numeric_limits<double>::digits10);
}
o << m_value.number_float;
@ -7046,55 +7053,35 @@ class basic_json
@brief parse floating point number
This function (and its overloads) serves to select the most approprate
standard floating point number parsing function based on the type
supplied via the first parameter. Set this to
@a static_cast<number_float_t>(nullptr).
standard floating point number parsing function (i.e., `std::strtof`,
`std::strtod`, or `std::strtold`) based on the type supplied via the
first parameter. Set this to @a static_cast<number_float_t>(nullptr).
@param type the @ref number_float_t in use
@param[in] type the @ref number_float_t in use
@param endptr recieves a pointer to the first character after the number
@param[in,out] endptr recieves a pointer to the first character after
the number
@return the floating point number
@warning This function uses `std::strtof`, `std::strtod`, or
`std::strtold` which use the current C locale to determine which
character is used as decimal point character. This may yield to parse
errors if the locale does not used `.`.
*/
long double str_to_float_t(long double* /* type */, char** endptr) const
{
return std::strtold(reinterpret_cast<typename string_t::const_pointer>(m_start), endptr);
}
/*!
@brief parse floating point number
This function (and its overloads) serves to select the most approprate
standard floating point number parsing function based on the type
supplied via the first parameter. Set this to
@a static_cast<number_float_t>(nullptr).
@param type the @ref number_float_t in use
@param endptr recieves a pointer to the first character after the number
@return the floating point number
*/
double str_to_float_t(double* /* type */, char** endptr) const
/// @copydoc str_to_float_t
double str_to_float_t(double*, char** endptr) const
{
return std::strtod(reinterpret_cast<typename string_t::const_pointer>(m_start), endptr);
}
/*!
@brief parse floating point number
This function (and its overloads) serves to select the most approprate
standard floating point number parsing function based on the type
supplied via the first parameter. Set this to
@a static_cast<number_float_t>(nullptr).
@param type the @ref number_float_t in use
@param endptr recieves a pointer to the first character after the number
@return the floating point number
*/
float str_to_float_t(float* /* type */, char** endptr) const
/// @copydoc str_to_float_t
float str_to_float_t(float*, char** endptr) const
{
return std::strtof(reinterpret_cast<typename string_t::const_pointer>(m_start), endptr);
}
@ -7369,8 +7356,8 @@ class basic_json
// check if conversion loses precision (special case -0.0 always loses precision)
const auto int_val = static_cast<number_integer_t>(result.m_value.number_float);
if (result.m_value.number_float == static_cast<number_float_t>(int_val) &&
result.m_value.number_integer != json_value(-0.0f).number_integer)
if (result.m_value.number_float == static_cast<number_float_t>(int_val) and
result.m_value.number_integer != json_value(-0.0f).number_integer)
{
// we would not lose precision -> return int
result.m_type = value_t::number_integer;

3
test/unit.cpp
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@ -11602,7 +11602,8 @@ TEST_CASE("regression tests")
CHECK(j_double.get<double>() == 1.23e45);
// long double
nlohmann::basic_json<std::map, std::vector, std::string, bool, int64_t, long double> j_long_double = 1.23e45L;
nlohmann::basic_json<std::map, std::vector, std::string, bool, int64_t, long double> j_long_double =
1.23e45L;
CHECK(j_long_double.get<long double>() == 1.23e45L);
}
}