First official (non-beta) release of CFFI 2.0.

Repository: https://github.com/apnadkarni/tcl-cffi

Docs: https://cffi.magicsplat.com/

Downloads: https://sourceforge.net/projects/magicsplat/files/cffi

CFFI is a Foreign Function Interface extension for Tcl 8.6 and 9.

## Changes in v2.0

### Platform and backends

- Support for Tcl 9

- The `dyncall` backend now requires dyncall 1.4 and adds support for
callbacks, variable arguments and passing of structs by value.

### Type declarations and annotations

- New class `Interface` for modeling COM objects.

- New class `Union` to support C unions.

- New base type `uuid`.

- Array type declarations can now use aliases as the base type.

- New `type` subcommands `tobinary` and `frombinary` to construct or
deconstruct a binary string for any type declaration.

- The `nullifempty` annotation may also be applied for types `bytes`,
`chars` and `unichars`.

- The `nullifempty` annotation may be used for optional `out` parameters
to indicate they are optional.

- Added `saveerrors` annotation to save errno and Win32 error values and
the `savederrors` command to retrieve them.

- New `discard` annotation to discard the result of a function call.

- New annotation `multisz` to support MULTI_SZ strings on Windows.

### Memory management

- New `memory` subcommands `towinstring`, `fromwinstring`, `tounistring`
and `fromunistring`.

- New command `memory arena` for stack-like memory allocation at script
level.

### Structs

- New option `-pack` for `Struct` to control alignment and padding.

- Added method `size` for structs and unions.

- Allow last field in a struct to be a variable size array.

### Enums

- Integer values for enum types that are bitmasks are no longer
automatically mapped to list of enum members. Note enum members are
still implicitly converted to integer values. *Incompatible change*

- New `enum` subcommand `alias` to couple an enum definition as an alias.

- New `enum` subcommand `names` to return names of enum members.

### Pointers

- `pointer castable` can now take multiple arguments.

- Pointer definitions within a struct or union have an implicit
`unsafe` annotation.

### Function definitions

- New syntax for comments within `functions` and `stdcalls` definitions.

- Output struct parameters can be passed as undefined variables.

- Annotation `retval` can be applied to parameters to `void` functions.

- Added option `-ignoremissing` to `Wrapper` methods `functions` and
`stdcalls` to not raise error in case of missing shared library
functions.

- Lengths of variable size array parameters can be passed through
`byref` or `inout` parameters.

- On error exceptions, the `errorCode` variable now includes the numeric
error code when one of the error handling annotations is present.

### Miscellaneous

- Enhanced `help` command.

- Built-in aliases are now loaded in the `::cffi::c` namespace and
implicitly included in the search path.

- Various [bug
fixes](https://github.com/apnadkarni/tcl-cffi/milestone/13?closed=1).

Am 05.12.2024 um 06:59 schrieb Ashok:
> First official (non-beta) release of CFFI 2.0.

Wow, so many changes and new features, really amazing !

Thanks Ashok,
Harald