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use templated is_negative

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This commit is contained in:
Isaac Nickaein 2021-05-19 14:21:25 +04:30
parent fe230334d9
commit da500135a6
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GPG Key ID: F472FBD1891723CE
2 changed files with 30 additions and 4 deletions
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17
include/nlohmann/detail/output/serializer.hpp
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@ -664,6 +664,20 @@ class serializer
}
}
template <typename NumberType,
enable_if_t<std::is_signed<NumberType>::value, int> = 0>
bool is_negative_number(NumberType x)
{
return x < 0;
}
template < typename NumberType,
enable_if_t <std::is_unsigned<NumberType>::value, int > = 0 >
bool is_negative_number(NumberType /*unused*/)
{
return false;
}
/*!
@brief dump an integer
@ -707,12 +721,11 @@ class serializer
// use a pointer to fill the buffer
auto buffer_ptr = number_buffer.begin(); // NOLINT(llvm-qualified-auto,readability-qualified-auto,cppcoreguidelines-pro-type-vararg,hicpp-vararg)
const bool is_negative = std::is_signed<NumberType>::value && !(x >= 0); // see issue #755
number_unsigned_t abs_value;
unsigned int n_chars{};
if (is_negative)
if (is_negative_number(x))
{
*buffer_ptr = '-';
abs_value = remove_sign(static_cast<number_integer_t>(x));

17
single_include/nlohmann/json.hpp
View File

@ -17088,6 +17088,20 @@ class serializer
}
}
template <typename NumberType,
enable_if_t<std::is_signed<NumberType>::value, int> = 0>
bool is_negative_number(NumberType x)
{
return x < 0;
}
template < typename NumberType,
enable_if_t <std::is_unsigned<NumberType>::value, int > = 0 >
bool is_negative_number(NumberType /*unused*/)
{
return false;
}
/*!
@brief dump an integer
@ -17131,12 +17145,11 @@ class serializer
// use a pointer to fill the buffer
auto buffer_ptr = number_buffer.begin(); // NOLINT(llvm-qualified-auto,readability-qualified-auto,cppcoreguidelines-pro-type-vararg,hicpp-vararg)
const bool is_negative = std::is_signed<NumberType>::value && !(x >= 0); // see issue #755
number_unsigned_t abs_value;
unsigned int n_chars{};
if (is_negative)
if (is_negative_number(x))
{
*buffer_ptr = '-';
abs_value = remove_sign(static_cast<number_integer_t>(x));