CHANGELOG.md

Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

Added

Build system

All executable and library targets now receive preprocessor definitions describing the target they're being compiled for
- On Unix-like systems, the symbol CRUCIBLE_UNIX is defined in all header and source files
- On Windows-like systems, the symbol CRUCIBLE_WINDOWS is defined in all header and source files
- On all targets, the symbol CRUCIBLE_ROOT is defined to the path to the root of the repository

`core` library

A library-level core.hpp header that #includes all other core headers
A new namespace called fallible
- Provides a very similar type to either::Either, but with better semantics and more specific names
- Also provides analogues for either::Lhs and either::Rhs called fallible::Failure and fallible::Success
- Also also provides a type called Error that serves as a variadic error type container
A new namespace called arrays
- Provides two new types: Array, which owns a dynamically allocated buffer; and Slice, which views a subsection of an Array
- Also provides two overloads of a function called make_array(), which constructs an Array from a C array of static or dynamic size
A new overload of format::format_carray() that accepts a size argument
A new API for formatting classes and structs: format_record() and build_fields()
- A new type, format::Context, supplies formatting parameters and can be made with format::build_context()
- format_record() is a utility function that is called from T::format() for any T
- build_fields() is used to obtain a builder object that collects all of the fields in the object into a string

`meta` library

A new library for communicating meta-level information (like libc capabilities) from the build system to the source code
Runtime capabilities (mainly of the C library) can be checked using the CRUCIBLE_META_CAPABILITY_* macros in the capability.hpp header

`process` library

This is a new library that deals with things related to the process that Crucible is running inside of
So far, there is one namespace called backtrace, which deals with getting backtraces in a cross-platform way:
- The take_detailed_snapshot() function captures as much debug information as possible in DetailedStackFrame objects
- The take_simple_snapshot() function captures only function names in SimpleStackFrame objects
- The terminate_handler() function can be registered as a terminate handler using std::set_terminate() to print a nice crash report
There is also the usual result namespace, with two error types so far:
- EmptyBacktrace indicates that the stack walking mechanism found 0 frames above the caller in the current thread's call stack
- MissingDebugInformation indicates that a detailed snapshot couldn't be performed because there was no debug information found

`testing` library

A library-level testing.hpp header that #includes all other testing headers
Two new macros: EXPECT_FAILURE() and EXPECT_SUCCESS(), which test the state of a fallible::Result object

`unix` library

A library-level unix.hpp header that #includes all other unix headers
A new namespace called backtrace
- Provides a function called snapshot() which takes a snapshot of the current call stack
- Also provides a simple type called Frame which holds the symbol associated with each frame of the call stack

`windows` library

A library-level windows.hpp header that #incudes all other windows headers
A new namespace called backtrace
- Provides a function called snapshot() which takes a snapshot of the current call stack
- Also provides a simple type called Frame which holds a semantic description of one frame of the call stack

Changed

General

Combined the boba library with the vm library, then renamed it to bolt
Changed the supported Linux variant from Arch on amd64 to Ubuntu on amd64 in the README
Clarified the supported versions of macOS and Windows in the README

Build system

Unified naming of all CMake modules, functions, and variables to make it obvious when something is part of Crucible
- Modules are named with the convention CrucibleXyz.cmake
- Functions are named with the convention crucible_xyz()
- Variables are named with the convention CRUCIBLE_XYZ
Hid some low-level cache variables behind new CMake functions
- crucible_configure_language_standards() handles setting language flags
- crucible_configure_output_directory() handles setting the output directory of final artifacts
- crucible_configure_shared_library_exports() handles setting flags for how shared library exports are handled
Handle platform-specific libraries in the CMakeLists.txt for those libraries

`core` library

All format functions now take T const & instead of T &&, because formatters should never change the thing they're formatting
arrays::Array and arrays::Slice now use the new formatting API
core::assert has better formatting for its messages now
format::format_pointer() now requires a formatting context so it can render a pointed-to record properly

`testing` library

testing::cli::execute() now sets the terminate handler to process::backtrace::terminate_handler(), which prints a crash report
testing::expect has better formatting for its messages now
testing::console_reporter has totally redone reporting for better readability
- Failures are now collected and displayed at the end, rather than printed inline with the tests
- Instead of indenting to show hierarchy, section headers with underlining and colors are used to flatten the output and make it easier to read

Deprecated

Removed

The bobadump executable is totally gone, because boba has been rolled into the bolt library
The os library is gone, because its only user was bobadump (which was also removed)

Fixed

Check the target compatibility after setting the C++ standard (so that static_assert works properly)
Make sure to save the CMAKE_*_OUTPUT_DIRECTORY variables to the CMake cache
Fixed compilation errors and failing tests when building on Linux

Security

0.6.0

Released on February 05, 2022.

Added

`parsing` library

A new combinator called Map and associated factory function make_map()
- Accepts a parser and a function and transforms the result of the parser using the function
A new combinator called Bind and associated factory function make_bind()
- Uses the result of one parser to build a new parser, then applies the new parser
A new combinator called Tee and associated factory function make_tee()
- Similar to Bind, but keeps the output of both parsers and returns it in a std::pair
Several new factory functions and types in the bytes namespace (used to be the bits namespace):
- Endianness, an enumeration used to distinguish big-endian and little-endian parsers from one another
- U8Le, U16Le, U32Le, U64Be, U8Be, U16Be, U32Be, and U64Be: parsers for the appropriate type and endianness
- make_exact() and make_take(): factory functions for creating Exact and Take parsers
- make_u8_le(), make_u16_le(), make_u32_le(), make_u64_le(): factory functions for little-endian unsigned integer parsers
- make_u8_be(), make_u16_be(), make_u32_be(), make_u64_be(): factory functions for big-endian unsigned integer parsers

Changed

Build system

Disabled the C4180 compiler warning on MSVC due to not being helpful and causing the build to fail

`bobadump` executable

Updated output to correspond with new Boba format

`boba` library

Total overhaul of the file format and internals
- The schema block is gone; instead we have a special container metadata section
- The from_bytes() API is exactly the same, but the Container type is now a simple record containing a vector of headers
New namespace: container
- Contains simple record types for both individual block headers and the container as a whole
New namespace: read
- The from_bytes() function was moved here

`parsing` library

The meaning of the Into parser combinator has changed
- Into<T> now converts the result of its wrapped parser into a T using one of T's constructors
The bits namespace has been renamed to bytes, and also renamed the contents:
- Renamed BitsState type to State
- Renamed ByteSequence parser to Exact
- Renamed SizedByteSequence parser to Take
- Combined BigEndianUnsignedInteger and LittleEndianUnsignedInteger parsers into UnsignedInteger

Removed

`boba` library

The metadata namespace is gone; see the new container and read namespaces for equivalent functionality

`parsing` library

The >> operator is no longer overloaded to construct an instance of Into
- Use make_into() instead

Fixed

`bobadump` executable

Tests were not passing on windows due to \r\n line endings not being handled correctly in the test script

`parsing` library

Compilation errors on macOS due to mis-ordered class fields and missing constructors

0.5.0

Released on January 01, 2022.

Added

`bobadump` executable

New executable for dumping Boba files
- No options; just use crucible-bobadump BOBA_FILE
- Prints the schema header (but not the schema entries) and each user header

`core` library

New formatter for primitive integer types called format_integral()
- Will work on anything for which std::is_integral evaluates to true
New abstract method in AbstractError called describe()
- In contrast to format(), which is intended for developers, describe() is intended for end users
either::Either got new methods bind_lhs() and bind_rhs()
- Maps a value to a whole new Either instance
- This is in contrast to map_lhs() and map_rhs(), which map a value to another value
- Can be used to chain Either-returning functions together

`os` library

New library for abstracting over "operating-system-y" things
- Automatically switches between unix and windows as a backend depending on the compilation target
- The fs namespace has platform-agnostic wrapper functions for all of the utilities in unix::fs and windows::fs

Build system

Support for Python test drivers via add_crucible_python_test() (intended mainly for testing executables)

General

Added information about Python tests to the readme
Added information about supported compilation targets to the readme

Changed

`bobadump` executable

Renamed from boba-dump to just bobadump

`core` library

either::LHS and either::RHS renamed to either::Lhs and either::Rhs for readability

`os` library

The Windows implementation of the fs namespace now uses the bind_lhs() and bind_rhs() APIs of core::either::Either

Build system

Silenced the message from find_package, which could be really long and was basically just noise

General

All uses of Result have been changed to Either to remove duplicated code
Better end-user error messages across the board
Uses of "Boba" as a word standardized on camel-case, not uppercase (BOBA) or lowercase (boba)

Removed

The core::result namespace has been completely removed; use core::either instead

Fixed

`parsing` library

Compilation error on MSVC due to signed/unsigned comparison mismatch

`unix` library

Errors now have their details reported properly (we see the errno message)

`windows` library

Errors now have their details reported properly (we see the GetLastError() message)

0.4.0

Released on December 04, 2021.

Added

New libraries

boba, the reference implementation of the BOBA (Bunch Of Big Arrays) file format

`boba` library

The new errors namespace:
- The main error class BobaError
- The ParsingFailed error variant for when loading a BOBA container fails
- A type alias BobaResult for core::result::Result
The new metadata namespace:
- A POD type called Header for keeping the (almost) raw information about each block header
- A type called Schema that wraps the very first Header of a container, providing information about the rest of the contents
- A type called Container that holds all block headers and provides iterator access to them, as well as the schema
- A function called from_bytes() which deserializes a byte stream into a Container

`core` library

The format namespace:
- Lots of functions for formatting anything you can think of: STL containers, plain arrays, C strings, pointers...
- A format_anything() function which intelligently selects a formatter based on a compile-time type check
Lots of new ASSERT macros, for parity with the EXPECT API
The errors namespace:
- An abstract base class called AbstractError, intended to be used for the Failure alternative of Result instances
Support for std::tuple in format::format_anything()
constexpr comparison operators for none::None

`parsing` library

A new combinator called SequenceOf
- Used to parse an exact number of repetitions of a single structure
- Fails if there aren't enough occurrences (but it's fine to have more)
- Has an associated error called SequenceOfError
The errors namespace:
- Error variants AmbiguousMatch, UnexpectedInput, and UnexpectedEndOfInput
- The main error class ParsingError and a Result alias named ParsingResult
A new combinator called Tuple
- Used to parse a heterogeneous sequence of substructures
- No combinator operator; use combinators::make_tuple()
New factory functions for each combinator: make_one_of(), make_pair(), make_into(), and make_sequence_of()

`unix` library

The errors namespace:
- The HostError type, which is moved from the old errno_error::ErrnoError type
- Error variants moved from the fs namespace
- The main error class UnixError and a Result alias named UnixError

`windows` library

The errors namespace:
- The HostError, which is moved from the old windows_error::WindowsError type
- Error variants moved from the fs and transcoding namespaces
- The main error class WindowsError and a Result alias named WindowsResult

`testing` library

Self tests (at least, for the parts that can be isolated and tested!)

Changed

ASSERT, EXPECT, and Result now use the format_anything() function to render objects
All error handling is now done using a combination of core::errors::AbstractError and core::result::Result
- Each library now has an errors namespace in which it defines its own specializations of these types

`core` library

none::None now formats as "None" instead of "None {}"

`parsing` library

AndThen combinator renamed to Pair (as a special case of Tuple)

Removed

ASSERT_NOT_NULL is gone; use ASSERT_NE(thing, nullptr)
The parsing::result, unix::errno_error, and windows::windows_error namespaces are all gone
- See the errors namespaces in each library for a standardized replacement

0.3.0

Released on November 06, 2021.

Added

`core` library

A new namespace called assert, containing functions for implementing the ASSERT macro family
In the assert namespace:
- A pair of new macros called ASSERT and ASSERT_NOT_NULL, which terminate the program with a message if the assertion does not pass
- A template function called fail, which implements the assertion failure mechanism
A new namespace called either, containing the Either type for holding one of two types of value
In the either namespace:
- A tag type called PreventSelectionForCopyAndMove used internally
- A pair of templates called LHS and RHS which distinguish the alternatives of an Either
- A template called Either which can hold one of two values, which can have different types
- A pair of functions called make_lhs() and make_rhs(), which can be used to create LHS and RHS instances to pass to an Either

`parsing` library

In the bits namespace:
- A new parser called SizedByteSequence which extracts a specific number of bytes from the input
In the combinators namespace:
- A new combinator called Into, which functions like AndThen but dynamically constructs the second parser based on the result of the first parser
- Two new errors called AndThenError and IntoError, which serve as error types for the AndThen and Into combinators
In the combinators::operators namespace:
- An overloaded >> operator, which builds Into instances from a parser and a function

`testing` library

In the expect namespace:
- A pair of new macros called EXPECT_CONTAINER_EQ and EXPECT_CONTAINER_NE, which check for (in)equality between two iterables
In the abstract_reporter namespace:
- The AbstractReporter class now has default do-nothing implementations for all of its virtual methods
- Two new hook methods for AbstractReporter: handle_group_start() and handle_group_end(), which get the name of the group
In the reporter namespace:
- Forwarding methods for the handle_group_start() and handle_group_end() hooks
In the console_reporter namespace:
- An implementation of handle_group_start that prints the group name

Changed

`testing` library

Scenarios and fixtures now both accept a tag argument before the name, which groups the fixtures and scenarios together
- Tags can be filtered on the command line with the -t or --tag option
- Fixtures will only be run for the scenarios that have the same tag
- BeforeAll and AfterAll fixtures will only run if their tag isn't being filtered out
Output rendering is much clearer
- A count of total scenarios run is now printed
- Fixtures are now printed at the same level as scenarios instead of inside them
- Fixtures receive a pass/fail note (when they would be printed anyways)
- Added icons for each keyword to make distinguishing them a little clearer
- Removed all white and bright white to make reading output on a white background easier
"Tags" renamed to "Groups"
- The option in the CLI runner has been changed from -t/--tag to -g/--group
Groups are now used as "containers" for scenarios
- There are now two loops: one over each group, and another over each scenario within the group
- BeforeAll and AfterAll fixtures now run only within their group, not at the start or end of the whole suite
- The console reporter will show groups as the main heading now, with scenarios and fixtures underneath

`unix` library

test_fs now uses the fixture mechanism to create and delete its file structure

General

Turned all instances of std::u8string, std::u8string_view, char8_t, and u8"" literals back into their legacy versions due to bad support
Standardized constructor syntax ({} unless () is semantically required)

`parsing` library

The bits::ByteSequence and text::CharacterSequence parsers now make a deep copy of their sequences
The bits::ByteSequence parser has been renamed to bits::ExactByteSequence

Fixed

Compilation error on AppleClang: no viable constructor or deduction guide in core::assert::fail()

0.2.0

Released on October 02, 2021.

Added

New libraries

vm library for the virtual machine implementation
parsing library for parser combinators

`parsing` library features

bits namespace containing primitives for parsing binary data
- FixedWidthUnsignedIntegerType concept, which constrains to one of the std::uintN_t types
- ByteSequenceMismatch basic error type
- UnexpectedEndOfInput basic error type
- BitsError composite error type
- BitsState type specialized for binary data
- ByteSequence parser which matches an exact sequence of bytes
- LittleEndianUnsignedInteger parser template
- BigEndianUnsignedInteger parser template
combinators namespace containing types for combining simple parsers into more complex parsers
- BothMatch error template
- NeitherMatch error template
- OneOfError composite error type
- OneOf parser combinator, which matches exclusively one or the other of the child parsers
- AndThen parser combinator, which matches one parser followed by another parser and returns both results
- operators namespace containing tools for building combinator trees
  - operator^, which combines two parsers using the OneOf combinator
  - operator&, which combines two parsers using the AndThen combinator
result namespace containing utility types for the outcomes of individual parsers
- Reject template for holding information about a rejected parse
- Accept template for holding information about an accepted parse
- reject function for building a Reject wrapped in a core::result::Failure
- accept function for building an Accept wrapped in a core::result::Success
text namespace containing primitives for parsing UTF-8 data
- CharacterSequenceMismatch basic error type
- TextError composite error type
- TextState type specialized for UTF-8 data
- CharacterSequence parser which matches an exact sequence of characters

`testing` library features

New namespace: fixture for types related to test fixtures
In the fixture namespace:
- FixtureFunction alias for the type of a fixture function
- FixtureVariant template type which serves as a base class for each kind of fixture
- BeforeAll, AfterAll, BeforeEach, and AfterEach tag types which differentiate each kind of fixture
- The Fixture type itself, which abstracts over all of these details
- In the FixtureVariant type:
  - A constructor accepting a FixtureFunction
  - A getter method called get_name() which returns the name of the fixture variant based on which derived class calls it
  - A method named execute() which runs the fixture and returns an outcome, just like a scenario
- In the BeforeAll, AfterAll, BeforeEach, and AfterEach types:
  - A constant string field containing the name of the variant for reporting purposes
- In the Fixture type:
  - A constructor which accepts a name and a fixture variant
  - A template method called has_variant() which checks what kind of fixture this is
  - A method called get_variant_name() which forwards to get_name() on the underlying variant
  - A getter method called get_name() which retrieves the fixture's name
  - A method called execute() which forwards to execute() on the underlying variant
In the suite namespace:
- Four new macros which define fixtures in the same way as scenarios: BEFORE_ALL, AFTER_ALL, BEFORE_EACH, and AFTER_EACH
- A new type called FixtureRegistrar which is used by the new macros to add fixtures to the suite
- In the FixtureRegistrar type:
  - A constructor that forwards to add_fixture() on the suite
- In the Suite singleton:
  - A method called add_fixture() which registers a new fixture in the suite
In reporter::Reporter, abstract_reporter::AbstractReporter, and console_reporter::ConsoleReporter:
- Two new methods called handle_fixture_start() and handle_fixture_end() which are called before and after each fixture
- Another new method called set_show_fixtures() which toggles how much information is reported about fixtures
In the expect namespace:
- A new template function called fail_comparison(), which is exactly like fail() but formats its output specifically as a comparison failure

Changed

Build system

Upgrade the C++ version to C++20
Renamed the test library to testing to better fit with other library names (specifically parsing)

`testing` library features

Print a special message when there are no tests in a test suite
Tests can now accept a --show-fixtures argument on the command line which causes the reporter to print more information about which fixtures run and when
The SCENARIO macro and ScenarioRegistrar type have been moved to the suite namespace
The console reporter will now display a count of total fixture invocations in the suite summary
All reporters now require a third argument, fixture_count, to the handle_suite_end() method
The EXPECT family of macros now print much more detailed information when a test fails
In the expect namespace:
- The fail function now takes more arguments and has been made into a template based on the type of value being EXPECTed

Fixed

`parsing` library

Compilation cast truncates constant value warning on MSVC

`testing` library

Disallow copying and moving the Suite singleton
Incorrect include guard symbols
Compilation warning on AppleClang: [[nodiscard]] on a function returning void

Build system

Give a nice message from CMake instead of weird errors when trying to build for non-64-bit systems

0.1.0

Released on September 04, 2021.

Added

New libraries

core library for fundamental types and functions used by everything else
test library for testing infrastructure
unix library for wrapping Unix-like APIs
windows library for wrapping Windows APIs

`core` library features

core::constant_error namespace, containing a ConstantError template for errors with a constant message
core::error_chain namespace, containing the ErrorChain class for building complex error types
core::none namespace, containing the None type to use as a placeholder
core::resource_warden namespace, containing a class template for cleaning up raw resources on scope exit
core::result namespace, containing facilities for operations that can fail

`test` library features

test::abstract_reporter namespace, containing the AbstractReporter interface
test::cli namespace, containing a function execute() that can be called from main()
test::console_reporter namespace, containing a reporter that writes to stdout
test::expect namespace, containing macros to express test assertions
test::outcome namespace, containing types representing scenario outcomes
test::reporter namespace, containing factories for specific reporters and also a wrapper type
test::scenario namespace, containing the Scenario type for representing a single test scenario
test::suite namespace, containing the Suite singleton used to hold all of the tests in a suite

`unix` library features

unix::errno_error namespace, containing utilities for working with errno
unix::fs namespace, containing wrappers for filesystem APIs on Unix-like systems

`windows` library features

windows::fs namespace, containing wrappers for filesystem APIs on Windows
windows::transcoding namespace, containing functions for transcoding UTF8 with UTF16 for Windows APIs
windows::windows_error namespace, containing functions and a type for reading and formatting Windows errors

Build system features

AddCrucibleExecutable module, which provides a wrapper for add_executable()
AddCrucibleLibrary module, which provides a wrapper for add_library()
AddCrucibleTest module, which provides a wrapper for add_test()
EnableCompilerWarnings module, which provides a function that enables common compiler warning flags
EnableRuntimeSanitizers module, which provides a function that enables ASAN, TSAN, and UBSAN based on options
Write all final build outputs (executables and libraries) to ${PROJECT_BINARY_DIR}/artifacts
Automatically export all symbols from all libraries when building Windows DLLs

Repository features

Build dependencies in the README
Build instructions in the README
Test instructions in the README
Attribution in the README

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# Changelog

All notable changes to this project will be documented in this file.

The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project
adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [Unreleased]

### Added

#### Build system

* All executable and library targets now receive preprocessor definitions describing the target they're being compiled for
  * On Unix-like systems, the symbol `CRUCIBLE_UNIX` is defined in all header and source files
  * On Windows-like systems, the symbol `CRUCIBLE_WINDOWS` is defined in all header and source files
  * On all targets, the symbol `CRUCIBLE_ROOT` is defined to the path to the root of the repository

#### `core` library

* A library-level `core.hpp` header that `#include`s all other `core` headers
* A new namespace called `fallible`
  * Provides a very similar type to `either::Either`, but with better semantics and more specific names
  * Also provides analogues for `either::Lhs` and `either::Rhs` called `fallible::Failure` and `fallible::Success`
  * _Also_ also provides a type called `Error` that serves as a variadic error type container
* A new namespace called `arrays`
  * Provides two new types: `Array`, which owns a dynamically allocated buffer; and `Slice`, which views a subsection of an `Array`
  * Also provides two overloads of a function called `make_array()`, which constructs an `Array` from a C array of static or dynamic size
* A new overload of `format::format_carray()` that accepts a `size` argument
* A new API for formatting classes and structs: `format_record()` and `build_fields()`
  * A new type, `format::Context`, supplies formatting parameters and can be made with `format::build_context()`
  * `format_record()` is a utility function that is called from `T::format()` for any `T`
  * `build_fields()` is used to obtain a builder object that collects all of the fields in the object into a string

#### `meta` library

* A new library for communicating meta-level information (like libc capabilities) from the build system to the source code
* Runtime capabilities (mainly of the C library) can be checked using the `CRUCIBLE_META_CAPABILITY_*` macros in the `capability.hpp` header

#### `process` library

* This is a new library that deals with things related to the process that Crucible is running inside of
* So far, there is one namespace called `backtrace`, which deals with getting backtraces in a cross-platform way:
  * The `take_detailed_snapshot()` function captures as much debug information as possible in `DetailedStackFrame` objects
  * The `take_simple_snapshot()` function captures only function names in `SimpleStackFrame` objects
  * The `terminate_handler()` function can be registered as a terminate handler using `std::set_terminate()` to print a nice crash report
* There is also the usual `result` namespace, with two error types so far:
  * `EmptyBacktrace` indicates that the stack walking mechanism found 0 frames above the caller in the current thread's call stack
  * `MissingDebugInformation` indicates that a detailed snapshot couldn't be performed because there was no debug information found

#### `testing` library

* A library-level `testing.hpp` header that `#include`s all other `testing` headers
* Two new macros: `EXPECT_FAILURE()` and `EXPECT_SUCCESS()`, which test the state of a `fallible::Result` object

#### `unix` library

* A library-level `unix.hpp` header that `#include`s all other `unix` headers
* A new namespace called `backtrace`
  * Provides a function called `snapshot()` which takes a snapshot of the current call stack
  * Also provides a simple type called `Frame` which holds the symbol associated with each frame of the call stack

#### `windows` library

* A library-level `windows.hpp` header that `#incude`s all other `windows` headers
* A new namespace called `backtrace`
  * Provides a function called `snapshot()` which takes a snapshot of the current call stack
  * Also provides a simple type called `Frame` which holds a semantic description of one frame of the call stack

### Changed

#### General

* Combined the `boba` library with the `vm` library, then renamed it to `bolt`
* Changed the supported Linux variant from Arch on amd64 to Ubuntu on amd64 in the README
* Clarified the supported versions of macOS and Windows in the README

#### Build system

* Unified naming of all CMake modules, functions, and variables to make it obvious when something is part of Crucible
  * Modules are named with the convention `CrucibleXyz.cmake`
  * Functions are named with the convention `crucible_xyz()`
  * Variables are named with the convention `CRUCIBLE_XYZ`
* Hid some low-level cache variables behind new CMake functions
  * `crucible_configure_language_standards()` handles setting language flags
  * `crucible_configure_output_directory()` handles setting the output directory of final artifacts
  * `crucible_configure_shared_library_exports()` handles setting flags for how shared library exports are handled
* Handle platform-specific libraries in the `CMakeLists.txt` for those libraries

#### `core` library

* All `format` functions now take `T const &` instead of `T &&`, because formatters should never change the thing they're formatting
* `arrays::Array` and `arrays::Slice` now use the new formatting API
* `core::assert` has better formatting for its messages now
* `format::format_pointer()` now requires a formatting context so it can render a pointed-to record properly

#### `testing` library

* `testing::cli::execute()` now sets the terminate handler to `process::backtrace::terminate_handler()`, which prints a crash report 
* `testing::expect` has better formatting for its messages now
* `testing::console_reporter` has totally redone reporting for better readability
  * Failures are now collected and displayed at the end, rather than printed inline with the tests
  * Instead of indenting to show hierarchy, section headers with underlining and colors are used to flatten the output and make it easier to read

### Deprecated

### Removed

* The `bobadump` executable is totally gone, because `boba` has been rolled into the `bolt` library
* The `os` library is gone, because its only user was `bobadump` (which was also removed)

### Fixed

* Check the target compatibility _after_ setting the C++ standard (so that `static_assert` works properly)
* Make sure to save the `CMAKE_*_OUTPUT_DIRECTORY` variables to the CMake cache
* Fixed compilation errors and failing tests when building on Linux

### Security

## [0.6.0]

Released on February 05, 2022.

### Added

#### `parsing` library

* A new combinator called `Map` and associated factory function `make_map()`
  * Accepts a parser and a function and transforms the result of the parser using the function
* A new combinator called `Bind` and associated factory function `make_bind()`
  * Uses the result of one parser to build a new parser, then applies the new parser
* A new combinator called `Tee` and associated factory function `make_tee()`
  * Similar to `Bind`, but keeps the output of both parsers and returns it in a `std::pair`
* Several new factory functions and types in the `bytes` namespace (used to be the `bits` namespace):
  * `Endianness`, an enumeration used to distinguish big-endian and little-endian parsers from one another
  * `U8Le`, `U16Le`, `U32Le`, `U64Be`, `U8Be`, `U16Be`, `U32Be`, and `U64Be`: parsers for the appropriate type and endianness
  * `make_exact()` and `make_take()`: factory functions for creating `Exact` and `Take` parsers
  * `make_u8_le()`, `make_u16_le()`, `make_u32_le()`, `make_u64_le()`: factory functions for little-endian unsigned integer parsers
  * `make_u8_be()`, `make_u16_be()`, `make_u32_be()`, `make_u64_be()`: factory functions for big-endian unsigned integer parsers

### Changed

#### Build system

* Disabled the [`C4180`] compiler warning on MSVC due to not being helpful and causing the build to fail

#### `bobadump` executable

* Updated output to correspond with new Boba format

#### `boba` library

* Total overhaul of the file format and internals
  * The schema block is gone; instead we have a special container metadata section
  * The `from_bytes()` API is exactly the same, but the `Container` type is now a simple record containing a vector of headers
* New namespace: `container`
  * Contains simple record types for both individual block headers and the container as a whole
* New namespace: `read`
  * The `from_bytes()` function was moved here

#### `parsing` library

* The meaning of the `Into` parser combinator has changed
  * `Into<T>` now converts the result of its wrapped parser into a `T` using one of `T`'s constructors
* The `bits` namespace has been renamed to `bytes`, and also renamed the contents:
  * Renamed `BitsState` type to `State`
  * Renamed `ByteSequence` parser to `Exact`
  * Renamed `SizedByteSequence` parser to `Take`
  * Combined `BigEndianUnsignedInteger` and `LittleEndianUnsignedInteger` parsers into `UnsignedInteger`

### Removed

#### `boba` library

* The `metadata` namespace is gone; see the new `container` and `read` namespaces for equivalent functionality

#### `parsing` library

* The `>>` operator is no longer overloaded to construct an instance of `Into`
  * Use `make_into()` instead

### Fixed

#### `bobadump` executable

* Tests were not passing on windows due to `\r\n` line endings not being handled correctly in the test script

#### `parsing` library

* Compilation errors on macOS due to mis-ordered class fields and missing constructors

## [0.5.0]

Released on January 01, 2022.

### Added

#### `bobadump` executable

* New executable for dumping Boba files
  * No options; just use `crucible-bobadump BOBA_FILE`
  * Prints the schema header (but not the schema entries) and each user header

#### `core` library

* New formatter for primitive integer types called `format_integral()`
  * Will work on anything for which `std::is_integral` evaluates to `true`
* New abstract method in `AbstractError` called `describe()`
  * In contrast to `format()`, which is intended for developers, `describe()` is intended for end users
* `either::Either` got new methods `bind_lhs()` and `bind_rhs()`
  * Maps a value to a whole new `Either` instance
  * This is in contrast to `map_lhs()` and `map_rhs()`, which map a value to another value
  * Can be used to chain `Either`-returning functions together

#### `os` library

* New library for abstracting over "operating-system-y" things
  * Automatically switches between `unix` and `windows` as a backend depending on the compilation target
  * The `fs` namespace has platform-agnostic wrapper functions for all of the utilities in `unix::fs` and `windows::fs`

#### Build system

* Support for Python test drivers via `add_crucible_python_test()` (intended mainly for testing executables)

#### General

* Added information about Python tests to the readme
* Added information about supported compilation targets to the readme

### Changed

#### `bobadump` executable

* Renamed from `boba-dump` to just `bobadump`

#### `core` library

* `either::LHS` and `either::RHS` renamed to `either::Lhs` and `either::Rhs` for readability

#### `os` library

* The Windows implementation of the `fs` namespace now uses the `bind_lhs()` and `bind_rhs()` APIs of `core::either::Either`  

#### Build system

* Silenced the message from `find_package`, which could be really long and was basically just noise

#### General

* All uses of `Result` have been changed to `Either` to remove duplicated code
* Better end-user error messages across the board
* Uses of "Boba" as a word standardized on camel-case, not uppercase (`BOBA`) or lowercase (`boba`)

### Removed

* The `core::result` namespace has been completely removed; use `core::either` instead

### Fixed

#### `parsing` library

* Compilation error on MSVC due to signed/unsigned comparison mismatch

#### `unix` library

* Errors now have their details reported properly (we see the `errno` message)

#### `windows` library

* Errors now have their details reported properly (we see the `GetLastError()` message)

## [0.4.0]

Released on December 04, 2021.

### Added

#### New libraries

* `boba`, the reference implementation of the BOBA (Bunch Of Big Arrays) file format

#### `boba` library

* The new `errors` namespace:
  * The main error class `BobaError`
  * The `ParsingFailed` error variant for when loading a BOBA container fails
  * A type alias `BobaResult` for `core::result::Result`
* The new `metadata` namespace:
  * A POD type called `Header` for keeping the (almost) raw information about each block header
  * A type called `Schema` that wraps the very first `Header` of a container, providing information about the rest of the contents
  * A type called `Container` that holds all block headers and provides iterator access to them, as well as the schema
  * A function called `from_bytes()` which deserializes a byte stream into a `Container`

#### `core` library

* The `format` namespace:
  * Lots of functions for formatting anything you can think of: STL containers, plain arrays, C strings, pointers...
  * A `format_anything()` function which intelligently selects a formatter based on a compile-time type check
* Lots of new `ASSERT` macros, for parity with the `EXPECT` API
* The `errors` namespace:
  * An abstract base class called `AbstractError`, intended to be used for the `Failure` alternative of `Result` instances
* Support for `std::tuple` in `format::format_anything()`
* `constexpr` comparison operators for `none::None`

#### `parsing` library

* A new combinator called `SequenceOf`
  * Used to parse an exact number of repetitions of a single structure
  * Fails if there aren't enough occurrences (but it's fine to have more)
  * Has an associated error called `SequenceOfError`
* The `errors` namespace:
  * Error variants `AmbiguousMatch`, `UnexpectedInput`, and `UnexpectedEndOfInput`
  * The main error class `ParsingError` and a `Result` alias named `ParsingResult`
* A new combinator called `Tuple`
  * Used to parse a heterogeneous sequence of substructures
  * No combinator operator; use `combinators::make_tuple()`
* New factory functions for each combinator: `make_one_of()`, `make_pair()`, `make_into()`, and `make_sequence_of()`

#### `unix` library

* The `errors` namespace:
  * The `HostError` type, which is moved from the old `errno_error::ErrnoError` type
  * Error variants moved from the `fs` namespace
  * The main error class `UnixError` and a `Result` alias named `UnixError`

#### `windows` library

* The `errors` namespace:
  * The `HostError`, which is moved from the old `windows_error::WindowsError` type
  * Error variants moved from the `fs` and `transcoding` namespaces
  * The main error class `WindowsError` and a `Result` alias named `WindowsResult`

#### `testing` library

* Self tests (at least, for the parts that can be isolated and tested!)

### Changed

* `ASSERT`, `EXPECT`, and `Result` now use the `format_anything()` function to render objects
* All error handling is now done using a combination of `core::errors::AbstractError` and `core::result::Result`
  * Each library now has an `errors` namespace in which it defines its own specializations of these types

#### `core` library

* `none::None` now formats as `"None"` instead of `"None {}"`

#### `parsing` library

* `AndThen` combinator renamed to `Pair` (as a special case of `Tuple`)

### Removed

* `ASSERT_NOT_NULL` is gone; use `ASSERT_NE(thing, nullptr)`
* The `parsing::result`, `unix::errno_error`, and `windows::windows_error` namespaces are all gone
  * See the `errors` namespaces in each library for a standardized replacement

## [0.3.0]

Released on November 06, 2021.

### Added

#### `core` library

* A new namespace called `assert`, containing functions for implementing the `ASSERT` macro family
* In the `assert` namespace:
  * A pair of new macros called `ASSERT` and `ASSERT_NOT_NULL`, which terminate the program with a message if the assertion does not pass
  * A template function called `fail`, which implements the assertion failure mechanism
* A new namespace called `either`, containing the `Either` type for holding one of two types of value
* In the `either` namespace:
  * A tag type called `PreventSelectionForCopyAndMove` used internally
  * A pair of templates called `LHS` and `RHS` which distinguish the alternatives of an `Either`
  * A template called `Either` which can hold one of two values, which can have different types
  * A pair of functions called `make_lhs()` and `make_rhs()`, which can be used to create `LHS` and `RHS` instances to pass to an `Either`

#### `parsing` library

* In the `bits` namespace:
  * A new parser called `SizedByteSequence` which extracts a specific number of bytes from the input
* In the `combinators` namespace:
  * A new combinator called `Into`, which functions like `AndThen` but dynamically constructs the second parser based on the result of the first parser
  * Two new errors called `AndThenError` and `IntoError`, which serve as error types for the `AndThen` and `Into` combinators
* In the `combinators::operators` namespace:
  * An overloaded `>>` operator, which builds `Into` instances from a parser and a function

#### `testing` library

* In the `expect` namespace:
  * A pair of new macros called `EXPECT_CONTAINER_EQ` and `EXPECT_CONTAINER_NE`, which check for (in)equality between two iterables
* In the `abstract_reporter` namespace:
  * The `AbstractReporter` class now has default do-nothing implementations for all of its virtual methods
  * Two new hook methods for `AbstractReporter`: `handle_group_start()` and `handle_group_end()`, which get the name of the group
* In the `reporter` namespace:
  * Forwarding methods for the `handle_group_start()` and `handle_group_end()` hooks
* In the `console_reporter` namespace:
  * An implementation of `handle_group_start` that prints the group name

### Changed

#### `testing` library

* Scenarios and fixtures now both accept a tag argument before the name, which groups the fixtures and scenarios together
  * Tags can be filtered on the command line with the `-t` or `--tag` option
  * Fixtures will only be run for the scenarios that have the same tag
  * `BeforeAll` and `AfterAll` fixtures will only run if their tag isn't being filtered out
* Output rendering is much clearer
  * A count of total scenarios run is now printed
  * Fixtures are now printed at the same level as scenarios instead of inside them
  * Fixtures receive a pass/fail note (when they would be printed anyways)
  * Added icons for each keyword to make distinguishing them a little clearer
  * Removed all white and bright white to make reading output on a white background easier
* "Tags" renamed to "Groups"
  * The option in the CLI runner has been changed from `-t/--tag` to `-g/--group`
* Groups are now used as "containers" for scenarios
  * There are now two loops: one over each group, and another over each scenario within the group
  * `BeforeAll` and `AfterAll` fixtures now run only within their group, not at the start or end of the whole suite
  * The console reporter will show groups as the main heading now, with scenarios and fixtures underneath

#### `unix` library

* `test_fs` now uses the fixture mechanism to create and delete its file structure

#### General

* Turned all instances of `std::u8string`, `std::u8string_view`, `char8_t`, and `u8""` literals back into their legacy versions due to bad support
* Standardized constructor syntax (`{}` unless `()` is semantically required)

#### `parsing` library

* The `bits::ByteSequence` and `text::CharacterSequence` parsers now make a deep copy of their sequences
* The `bits::ByteSequence` parser has been renamed to `bits::ExactByteSequence`

### Fixed

* Compilation error on AppleClang: `no viable constructor or deduction guide` in `core::assert::fail()`

## [0.2.0]

Released on October 02, 2021.

### Added

#### New libraries

* `vm` library for the virtual machine implementation
* `parsing` library for parser combinators

#### `parsing` library features

* `bits` namespace containing primitives for parsing binary data
  * `FixedWidthUnsignedIntegerType` concept, which constrains to one of the `std::uintN_t` types
  * `ByteSequenceMismatch` basic error type
  * `UnexpectedEndOfInput` basic error type
  * `BitsError` composite error type
  * `BitsState` type specialized for binary data
  * `ByteSequence` parser which matches an exact sequence of bytes
  * `LittleEndianUnsignedInteger` parser template
  * `BigEndianUnsignedInteger` parser template
* `combinators` namespace containing types for combining simple parsers into more complex parsers
  * `BothMatch` error template
  * `NeitherMatch` error template
  * `OneOfError` composite error type
  * `OneOf` parser combinator, which matches exclusively one or the other of the child parsers
  * `AndThen` parser combinator, which matches one parser followed by another parser and returns both results
  * `operators` namespace containing tools for building combinator trees
    * `operator^`, which combines two parsers using the `OneOf` combinator
    * `operator&`, which combines two parsers using the `AndThen` combinator
* `result` namespace containing utility types for the outcomes of individual parsers
  * `Reject` template for holding information about a rejected parse
  * `Accept` template for holding information about an accepted parse
  * `reject` function for building a `Reject` wrapped in a `core::result::Failure`
  * `accept` function for building an `Accept` wrapped in a `core::result::Success`
* `text` namespace containing primitives for parsing UTF-8 data
  * `CharacterSequenceMismatch` basic error type
  * `TextError` composite error type
  * `TextState` type specialized for UTF-8 data
  * `CharacterSequence` parser which matches an exact sequence of characters

#### `testing` library features

* New namespace: `fixture` for types related to test fixtures
* In the `fixture` namespace:
  * `FixtureFunction` alias for the type of a fixture function
  * `FixtureVariant` template type which serves as a base class for each kind of fixture
  * `BeforeAll`, `AfterAll`, `BeforeEach`, and `AfterEach` tag types which differentiate each kind of fixture
  * The `Fixture` type itself, which abstracts over all of these details
  * In the `FixtureVariant` type:
    * A constructor accepting a `FixtureFunction`
    * A getter method called `get_name()` which returns the name of the fixture variant based on which derived class calls it
    * A method named `execute()` which runs the fixture and returns an outcome, just like a scenario
  * In the `BeforeAll`, `AfterAll`, `BeforeEach`, and `AfterEach` types:
    * A constant string field containing the name of the variant for reporting purposes
  * In the `Fixture` type:
    * A constructor which accepts a name and a fixture variant
    * A template method called `has_variant()` which checks what kind of fixture this is
    * A method called `get_variant_name()` which forwards to `get_name()` on the underlying variant
    * A getter method called `get_name()` which retrieves the fixture's name
    * A method called `execute()` which forwards to `execute()` on the underlying variant
* In the `suite` namespace:
  * Four new macros which define fixtures in the same way as scenarios: `BEFORE_ALL`, `AFTER_ALL`, `BEFORE_EACH`, and `AFTER_EACH`
  * A new type called `FixtureRegistrar` which is used by the new macros to add fixtures to the suite
  * In the `FixtureRegistrar` type:
    * A constructor that forwards to `add_fixture()` on the suite
  * In the `Suite` singleton:
    * A method called `add_fixture()` which registers a new fixture in the suite
* In `reporter::Reporter`, `abstract_reporter::AbstractReporter`, and `console_reporter::ConsoleReporter`:
  * Two new methods called `handle_fixture_start()` and `handle_fixture_end()` which are called before and after each fixture
  * Another new method called `set_show_fixtures()` which toggles how much information is reported about fixtures
* In the `expect` namespace:
  * A new template function called `fail_comparison()`, which is exactly like `fail()` but formats its output specifically as a comparison failure

### Changed

#### Build system

* Upgrade the C++ version to C++20
* Renamed the `test` library to `testing` to better fit with other library names (specifically `parsing`)

#### `testing` library features

* Print a special message when there are no tests in a test suite
* Tests can now accept a `--show-fixtures` argument on the command line which causes the reporter to print more information about which fixtures run and when
* The `SCENARIO` macro and `ScenarioRegistrar` type have been moved to the `suite` namespace
* The console reporter will now display a count of total fixture invocations in the suite summary
* All reporters now require a third argument, `fixture_count`, to the `handle_suite_end()` method
* The `EXPECT` family of macros now print much more detailed information when a test fails
* In the `expect` namespace:
  * The `fail` function now takes more arguments and has been made into a template based on the type of value being `EXPECT`ed

### Fixed

#### `parsing` library

* Compilation `cast truncates constant value` warning on MSVC

#### `testing` library

* Disallow copying and moving the Suite singleton
* Incorrect include guard symbols
* Compilation warning on AppleClang: `[[nodiscard]]` on a function returning `void`

#### Build system

* Give a nice message from CMake instead of weird errors when trying to build for non-64-bit systems

## [0.1.0]

Released on September 04, 2021.

### Added

#### New libraries

* `core` library for fundamental types and functions used by everything else
* `test` library for testing infrastructure
* `unix` library for wrapping Unix-like APIs
* `windows` library for wrapping Windows APIs

#### `core` library features

* `core::constant_error` namespace, containing a `ConstantError` template for errors with a constant message
* `core::error_chain` namespace, containing the `ErrorChain` class for building complex error types
* `core::none` namespace, containing the `None` type to use as a placeholder
* `core::resource_warden` namespace, containing a class template for cleaning up raw resources on scope exit
* `core::result` namespace, containing facilities for operations that can fail

#### `test` library features

* `test::abstract_reporter` namespace, containing the `AbstractReporter` interface
* `test::cli` namespace, containing a function `execute()` that can be called from `main()`
* `test::console_reporter` namespace, containing a reporter that writes to stdout
* `test::expect` namespace, containing macros to express test assertions
* `test::outcome` namespace, containing types representing scenario outcomes
* `test::reporter` namespace, containing factories for specific reporters and also a wrapper type
* `test::scenario` namespace, containing the `Scenario` type for representing a single test scenario
* `test::suite` namespace, containing the `Suite` singleton used to hold all of the tests in a suite

#### `unix` library features

* `unix::errno_error` namespace, containing utilities for working with `errno`
* `unix::fs` namespace, containing wrappers for filesystem APIs on Unix-like systems

#### `windows` library features

* `windows::fs` namespace, containing wrappers for filesystem APIs on Windows
* `windows::transcoding` namespace, containing functions for transcoding UTF8 with UTF16 for Windows APIs
* `windows::windows_error` namespace, containing functions and a type for reading and formatting Windows errors

#### Build system features

* `AddCrucibleExecutable` module, which provides a wrapper for `add_executable()`
* `AddCrucibleLibrary` module, which provides a wrapper for `add_library()`
* `AddCrucibleTest` module, which provides a wrapper for `add_test()`
* `EnableCompilerWarnings` module, which provides a function that enables common compiler warning flags
* `EnableRuntimeSanitizers` module, which provides a function that enables ASAN, TSAN, and UBSAN based on options
* Write all final build outputs (executables and libraries) to `${PROJECT_BINARY_DIR}/artifacts`
* Automatically export all symbols from all libraries when building Windows DLLs

#### Repository features

* Build dependencies in the README
* Build instructions in the README
* Test instructions in the README
* Attribution in the README

[Unreleased]: https://gitlab.com/bravelytyped/crucible
[0.6.0]: https://gitlab.com/bravelytyped/crucible/-/tree/v0.6.0
[0.5.0]: https://gitlab.com/bravelytyped/crucible/-/tree/v0.5.0
[0.4.0]: https://gitlab.com/bravelytyped/crucible/-/tree/v0.4.0
[0.3.0]: https://gitlab.com/bravelytyped/crucible/-/tree/v0.3.0
[0.2.0]: https://gitlab.com/bravelytyped/crucible/-/tree/v0.2.0
[0.1.0]: https://gitlab.com/bravelytyped/crucible/-/tree/v0.1.0

[`C4180`]: https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-1-c4180?view=msvc-170

CHANGELOG.md

Changelog

Unreleased

Added

Build system

core library

meta library

process library

testing library

unix library

windows library

Changed

General

Build system

core library

testing library

Deprecated

Removed

Fixed

Security

0.6.0

Added

parsing library

Changed

Build system

bobadump executable

boba library

parsing library

Removed

boba library

parsing library

Fixed

bobadump executable

parsing library

0.5.0

Added

bobadump executable

core library

os library

Build system

General

Changed

bobadump executable

core library

os library

Build system

General

Removed

Fixed

parsing library

unix library

windows library

0.4.0

Added

New libraries

boba library

core library

parsing library

unix library

windows library

testing library

Changed

core library

parsing library

Removed

0.3.0

Added

core library

parsing library

testing library

Changed

testing library

unix library

General

parsing library

Fixed

0.2.0

Added

New libraries

parsing library features

`core` library

`meta` library

`process` library

`testing` library

`unix` library

`windows` library

`core` library

`testing` library

`parsing` library

`bobadump` executable

`boba` library

`parsing` library

`boba` library

`parsing` library

`bobadump` executable

`parsing` library

`bobadump` executable

`core` library

`os` library

`bobadump` executable

`core` library

`os` library

`parsing` library

`unix` library

`windows` library

`boba` library

`core` library

`parsing` library

`unix` library

`windows` library

`testing` library

`core` library

`parsing` library

`core` library

`parsing` library

`testing` library

`testing` library

`unix` library

`parsing` library

`parsing` library features

`testing` library features

`testing` library features

`parsing` library

`testing` library

`core` library features

`test` library features

`unix` library features

`windows` library features