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Merge branch 'develop' into feature/messagepack

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Niels Lohmann
2016-12-07 08:39:57 +01:00
parent ba3c5e1a25 bc28942101
commit a1693bfe48
47 changed files with 709 additions and 185 deletions
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164
src/json.hpp.re2c
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@ -1,7 +1,7 @@
/*
__ _____ _____ _____
__| | __| | | | JSON for Modern C++
| | |__ | | | | | | version 2.0.7
| | |__ | | | | | | version 2.0.8
|_____|_____|_____|_|___| https://github.com/nlohmann/json
Licensed under the MIT License <http://opensource.org/licenses/MIT>.
@ -5032,6 +5032,102 @@ class basic_json
return *this;
}
/*!
@brief add an object to an array
Creates a JSON value from the passed parameters @a args to the end of the
JSON value. If the function is called on a JSON null value, an empty array
is created before appending the value created from @a args.
@param[in] args arguments to forward to a constructor of @ref basic_json
@tparam Args compatible types to create a @ref basic_json object
@throw std::domain_error when called on a type other than JSON array or
null; example: `"cannot use emplace_back() with number"`
@complexity Amortized constant.
@liveexample{The example shows how `push_back()` can be used to add
elements to a JSON array. Note how the `null` value was silently converted
to a JSON array.,emplace_back}
@since version 2.0.8
*/
template<class... Args>
void emplace_back(Args&& ... args)
{
// emplace_back only works for null objects or arrays
if (not(is_null() or is_array()))
{
throw std::domain_error("cannot use emplace_back() with " + type_name());
}
// transform null object into an array
if (is_null())
{
m_type = value_t::array;
m_value = value_t::array;
assert_invariant();
}
// add element to array (perfect forwarding)
m_value.array->emplace_back(std::forward<Args>(args)...);
}
/*!
@brief add an object to an object if key does not exist
Inserts a new element into a JSON object constructed in-place with the given
@a args if there is no element with the key in the container. If the
function is called on a JSON null value, an empty object is created before
appending the value created from @a args.
@param[in] args arguments to forward to a constructor of @ref basic_json
@tparam Args compatible types to create a @ref basic_json object
@return a pair consisting of an iterator to the inserted element, or the
already-existing element if no insertion happened, and a bool
denoting whether the insertion took place.
@throw std::domain_error when called on a type other than JSON object or
null; example: `"cannot use emplace() with number"`
@complexity Logarithmic in the size of the container, O(log(`size()`)).
@liveexample{The example shows how `emplace()` can be used to add elements
to a JSON object. Note how the `null` value was silently converted to a
JSON object. Further note how no value is added if there was already one
value stored with the same key.,emplace}
@since version 2.0.8
*/
template<class... Args>
std::pair<iterator, bool> emplace(Args&& ... args)
{
// emplace only works for null objects or arrays
if (not(is_null() or is_object()))
{
throw std::domain_error("cannot use emplace() with " + type_name());
}
// transform null object into an object
if (is_null())
{
m_type = value_t::object;
m_value = value_t::object;
assert_invariant();
}
// add element to array (perfect forwarding)
auto res = m_value.object->emplace(std::forward<Args>(args)...);
// create result iterator and set iterator to the result of emplace
auto it = begin();
it.m_it.object_iterator = res.first;
// return pair of iterator and boolean
return {it, res.second};
}
/*!
@brief inserts element
@ -8921,8 +9017,22 @@ class basic_json
*/
void fill_line_buffer(size_t n = 0)
{
// if line buffer is used, m_content points to its data
assert(m_line_buffer.empty()
or m_content == reinterpret_cast<const lexer_char_t*>(m_line_buffer.data()));
// if line buffer is used, m_limit is set past the end of its data
assert(m_line_buffer.empty()
or m_limit == m_content + m_line_buffer.size());
// pointer relationships
assert(m_content <= m_start);
assert(m_start <= m_cursor);
assert(m_cursor <= m_limit);
assert(m_marker == nullptr or m_marker <= m_limit);
// number of processed characters (p)
const auto offset_start = m_start - m_content;
const size_t num_processed_chars = static_cast<size_t>(m_start - m_content);
// offset for m_marker wrt. to m_start
const auto offset_marker = (m_marker == nullptr) ? 0 : m_marker - m_start;
// number of unprocessed characters (u)
@ -8931,17 +9041,10 @@ class basic_json
// no stream is used or end of file is reached
if (m_stream == nullptr or m_stream->eof())
{
// skip this part if we are already using the line buffer
if (m_start != reinterpret_cast<const lexer_char_t*>(m_line_buffer.data()))
{
// copy unprocessed characters to line buffer
m_line_buffer.clear();
for (m_cursor = m_start; m_cursor != m_limit; ++m_cursor)
{
assert(m_cursor != nullptr);
m_line_buffer.append(1, static_cast<const char>(*m_cursor));
}
}
// m_start may or may not be pointing into m_line_buffer at
// this point. We trust the standand library to do the right
// thing. See http://stackoverflow.com/q/28142011/266378
m_line_buffer.assign(m_start, m_limit);
// append n characters to make sure that there is sufficient
// space between m_cursor and m_limit
@ -8954,16 +9057,18 @@ class basic_json
else
{
// delete processed characters from line buffer
m_line_buffer.erase(0, static_cast<size_t>(offset_start));
m_line_buffer.erase(0, num_processed_chars);
// read next line from input stream
std::string line;
std::getline(*m_stream, line, '\n');
m_line_buffer_tmp.clear();
std::getline(*m_stream, m_line_buffer_tmp, '\n');
// add line with newline symbol to the line buffer
m_line_buffer += line + "\n";
m_line_buffer += m_line_buffer_tmp;
m_line_buffer.push_back('\n');
}
// set pointers
m_content = reinterpret_cast<const lexer_char_t*>(m_line_buffer.c_str());
m_content = reinterpret_cast<const lexer_char_t*>(m_line_buffer.data());
assert(m_content != nullptr);
m_start = m_content;
m_marker = m_start + offset_marker;
@ -9046,9 +9151,20 @@ class basic_json
// iterate the result between the quotes
for (const lexer_char_t* i = m_start + 1; i < m_cursor - 1; ++i)
{
// process escaped characters
if (*i == '\\')
// find next escape character
auto e = std::find(i, m_cursor - 1, '\\');
if (e != i)
{
// see https://github.com/nlohmann/json/issues/365#issuecomment-262874705
for (auto k = i; k < e; k++)
{
result.push_back(static_cast<typename string_t::value_type>(*k));
}
i = e - 1; // -1 because of ++i
}
else
{
// processing escaped character
// read next character
++i;
@ -9135,12 +9251,6 @@ class basic_json
}
}
}
else
{
// all other characters are just copied to the end of the
// string
result.append(1, static_cast<typename string_t::value_type>(*i));
}
}
return result;
@ -9324,6 +9434,8 @@ class basic_json
std::istream* m_stream = nullptr;
/// line buffer buffer for m_stream
string_t m_line_buffer {};
/// used for filling m_line_buffer
string_t m_line_buffer_tmp {};
/// the buffer pointer
const lexer_char_t* m_content = nullptr;
/// pointer to the beginning of the current symbol