Colt-Cpp:

Contains helpers used throughout the Colt Compiler. These include portable bit-fields, endianness utilities, io, argument parsing and data structures.

Implemented Features:

• ✅ Feature is done and tested.
• ⚠️ Feature is nearly done (more testing needed).
• ❌ Feature is not ready for use.

Name	Description	Status	Note
Bitfields	Zero-overhead bitfields whose layout is guarenteed to be portable (except for endianness).	✅	Supports hashing and serialization.
choose_simd_implementation	Used to choose a different function at runtime depending on CPUID	✅	If needed, detecting more instructions sets could be added.
TargetEndian Endian Detection	Represents the target endianness.	✅	There is also the COLT_LITTLE_ENDIAN and COLT_BIG_ENDIAN macros.
Endian Conversions	Functions such as [hlb]to[hlb] to go from host endianness to another endianness or vice-versa.	✅	Implemented using intrinsics.
uhash and hash_append	Implements universal hashing as described in N3980.	⚠️	The current implemented hash_algorithms are fnv1a and SipHash-2-4.
Option	Optional vocabulary type with monadic operations.	✅	More unit tests could be added.
Expect	Expected vocabulary type with monadic operations	✅	More unit tests could be added.
Unicode Counting and Indexing	Provides countlen, unitlen, strlen, index_front, index_back Unicode aware functions.	✅	More unit tests could be added.
Unicode SIMD Utilities	Provides SIMD functions to optimize strlen and unitlen.	✅	See table below for supported architectures.
Unicode Aware StringView	View over Unicode data in any of UTF8, UTF16-[BL]E,UTF32-[BL]E.	✅	A type-erased StringView could also be added, whose encoding is determined at runtime.
Unicode Aware String	Contiguous Unicode aware String with SSO, count and middle caching, and const segment optimization.	❌	The implementation is a work in progress.
Memory Allocators	Provides a framework of composable allocators that allocates and deallocates MemBlock	⚠️	More allocators could be added.
Memory Allocators Reference	Reference to a local or global allocator, used by all data structures.	✅
BigInteger	Arbitrary precision big integer.	✅	More unit tests could be added. *
BigRational	Arbitrary precision big rational (x/y).	⚠️	Some API improvements could be done. *
Compile-time Map and BiMap	Hash (bi)map created at compile-time.	✅
Compile-time Math Functions	constexpr mathematical functions.	✅
Overflow checks	Provides checked_(add|sub|mul|div|mod) to detect overflow/underflow.	⚠️	More unit tests are needed.
Macro FOR_EACH	Macro that expands another macro for each of its arguments.	✅	For MSVC, this macro needs /Zc:preprocessor.
Macro assert_true	Assert that all conditions are true.	✅	Works at compile time.
Macro switch_no_default	Provides an unreachable default branch for a switch statement.	✅
OS DynamicLib	Represents a dynamically loaded library in a platform agnostic way.	✅	For Linux, -Wl,-export-dynamic must be specified for self-introspection.

* These classes are wrappers over GMP, which makes them already well-tested.

Unicode SIMD Utilities:

This project uses simdutf to improve the performance of Unicode-related utilities. However, more functions were needed, and I had to roll out my own SIMD versions in some cases.

• ✅ Function is written and tested.
• ⚠️ Function is written but not tested.
• ❌ Function is not written.

All x86_64 SIMD functions are tested using sde. All NEON SIMD functions are tested using QEMU.

	unitlen16	unitlen32	strlen8	strlen16
SSE2	✅	✅	✅	✅
SSE4.2	❌	❌	❌	❌
AVX2	✅	✅	✅	✅
AVX512	✅	✅	✅	✅
NEON	✅	✅	✅	✅