Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for a snapshot of the master branch, built from commit d9c68ca11f.

Release Notes

Boost 1.83.0

API Changes

#859 The library now only throws system_error, except for when allocation failed, in which case std::bad_alloc is thrown.
#884 Serialization behavior can now be changed by serialize_options.

New Features

#819 Contextual conversions.
#599 Parser option for more precise number parsing.
#885 Support parse_options in stream operator<<.
#397 Parser option to allow Infinity and NaN JSON literals.
#901 Parser mode that only validates numbers rather than parsing them.
#892 Numbers with exponent larger than INT_MAX are accepted by the parser and treated as infinity.

Fixes

#901 Fix object member functions that should provide strong guarantee.
#887 Fix ambiguity of end call when boost/range.hpp is included.
#902 Fix ASan failures.
#904 Fix error message for error::size_mismatch.
Fix conversion into tuple with const elements.

Boost 1.82.0

New Features

Improvements

#848 Caller-provided serializer storage.
#807 value_to supports missing elements for std::optional.
Documentation improvements.

Fixes

#876 Fix parser suspend inside an escape character.
#814 Make sentinel() return a unique pointer.

Boost 1.81.0

API Changes

#686 Conversion traits were redesigned.
#756 Removed condition::assign_error.
#758 Removed generic_category alias.

New Features

#749 object::stable_erase.
#778 Added error condition for generic library errors.
#619 Added parse overload for std::istream.
#619 operator>> for value.

Improvements

#686 Null-like type conversion support (including std::nullptr_t).
#736 Non-throwing conversion from value to user types.
#677 value_to/from supports std::optional and std::nullopt_t.
#517 value_to/from supports std::variant and std::monotype.
#626 value_to/from supports supports described classes and enums.
#757 Rvalue ref-qualified accessors for value.

Fixes

#745 Support for self-swap and self-move in string.
#747 Support for self-swap and self-move in array.
#735 Replaced C floating point constants with C++ equivalents.
Documentation improvements.

Boost 1.80.0

API Changes

#703 Add non-const value::at overloads.
#717 Add the ability to manually choose endianness of the platform.
Add string::subview() overload.

Fixes

#692 Fix segfault in array::erase(it).
#697 Fix low performance of serialize on libc++.
#708 Fix ambiguous conversion to std::string_view on GCC 8.
#717 Fix parsing on big-endian platforms.
#726 Fix handling of comment after trailing comma.
Minor documentation fixes.

Boost 1.79.0

API Changes

#650 Standalone mode of the library is removed. Users who wish to continue using standalone JSON can switch to the C++ Alliance fork.

New Features

#480 Add support for JSON Pointer.

Improvements

Add std::error_code overloads.
#680 Add boost::source_location to error_codes.

Fixes

#668 Naturally grow string during serialization.

Boost 1.78.0

API Changes

#628 Standalone mode of the library is removed.

Boost 1.78.0

API Changes

#628 Standalone mode of the library is deprecated.

New Features

#549 #550 Allow external libraries to forward declare value_to and value_from.

Fixes

#608 #612 Fixed signed integer overflow in number parsing.
#620 Documentation fixes.

Improvements

#557 Add support for /Zc:implicitNoexcept- on MSVC.

Boost 1.77.0

New Features

#538 Implicit conversion operator from string to std::string_view.
#521 std::hash specializations for json types.

Fixes

object deallocates the correct size.
Fixed crash when constructing array from a pair of iterators that form an empty range.
key_value_pair allocates with the correct alignment.

Improvements

value_to supports TupleLike types.
value_to and value_from support std::array and similar types.

Boost 1.76.0

Fixes

#481 Refactored value_from implementation; user customizations are now always preferred over library-provided overloads.
#484 Fixed imprecise parsing for some floating point numbers.
#485 Fixed link errors in standalone mode, when used alongside Boost.
#497 Fix Boost.Build builds on GCC 4.8.

Boost 1.75.0

Initial release.