Release 0.4.0

• PR#167: fixes to substr:
  • .begins_with() and .ends_with() now return false when input length is 0
• PR#166: fixes to substr and type_name()
  • substr:
    • improve SFINAE rules and overloads
    • add member type value_type
  • type_name():
    • make noexcept
    • return a new dedicated type TypeNameStr. This spares costly include of span.hpp
  • Improve std interop headers
  • Fix: from_chars_first() must use csubstr for the chars parameters
  • clang-tidy fixes with clang-22
• PR#161 Improve base64 facilities:
  • Move encoding/decoding/validation to low-level functions without abstractions:
    • c4::base64_valid()
    • c4::base64_encode()
    • c4::base64_decode()
  • Change the semantics of base64_decode() to return true when decode succeeds, or false when decode fails or the output buffer is insufficient.
  • Move the formatting facilities to c4/format_base64.hpp:
    • c4::fmt::base64()
    • c4::to_chars(buf, fmt::cbase64())
    • c4::from_chars(buf, fmt::cbase64())
  • Add c4/std/string_view_fwd.hpp

Release 0.3.0

• PR#162:
  • charconv.hpp:
    • add implementation of to_chars() for raw char pointers
    • improve from_chars() for bool
    • minor simplification of atoi_first() and atou_first()
  • format.hpp:
    • simplify boolalpha() implementation
    • catrs()/catseprs()/formatrs(): resize to capacity before trying
    • fix uncatsep(): force sep as a csubstr, and enforce it
    • cat()/catsep()/format(): add tests to ensure repeated args
    • improve implementation of fmt::left()/fmt::right(). add fmt::center()
  • Improve doxygen comments
• PR#163:
  • to_chars():
    • ensure char*/const char* (using strlen) overloads accept null pointer
    • add implementation for nullptr_t
• PR#164:
  • Move aalloc() et al to new hdr/src c4/alloc.hpp
  • Fix shared library exports, which were causing a link error in lld-link on Windows (see rapidyaml#600).
• PR#165: c4/std/span.hpp missing from amalgamate.py.

Release 0.2.12

PR#158:

• dump.hpp: fix c4::dump_directly<T> to use remove_cvref<T> such that references and consts are transitively handled.
• base64 formatting: add wrapper version of from_chars()

Release 0.2.11

• Fix #141: incorrect detection of clang-cl (PR#152). Also adds support for Visual Studio 2026.
• Fix missing value of C4CORE_VERSION in c4coreConfig.cmake (reported in rapidyaml#584).

Release 0.2.10

PR#156:

• Add traits class c4::is_writeable_string<>
• c4/std/*.hpp adapters: add missing forward declarations of c4::is_string<>
• Add default-less csubstr::copy_from() to simplify implementations of to_chars()/from_chars()
• Minor internal changes in c4::substr
• Add C++20 std::span<char> and std::span<const char> adapters in new header c4/std/span.hpp

Release 0.2.9

PR#154:

• Add c4::is_string<T> trait in c4/substr.hpp, and appropriate definitions for std::string, std::string_view and std::vector<char>. Default c4::dump_directly<T> to c4::is_string<T>.
• Minor cleanup to c4::srcloc in c4/error.hpp
• Minor implementation changes in c4::mem_repeat()
• Suppress false-positive null-dereference warnings for GCC >6
• Update fast_float to 8.2.4

Release 0.2.8

Fixes

• charconv: fix conversion warning (triggered in clang 21)

Release 0.2.7

• enum symbols:
  • remove useless const in return value of c4::esyms()
  • add overload for building from ptr,len
• dump.hpp: fix implicit typing in implementation of c4::format_dump()
• utf.hpp: add missing C4_EXPORT to c4::decode_code_point()
• fix warnings with cmake 4

Release 0.2.6

• PR#150: fix configure with cmake 4.

Release 0.2.5

• PR#149: Fix warnings from -Wundef