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Lasse R.H. Nielsen e293eb809d Reland "Add more `interface` and `final` modifiers to `dart:core`." This is a reland of commit `4f8333e80e` Blocked on Flutter patch: https://github.com/flutter/engine/pull/40175 Original change's description: > Add more `interface` and `final` modifiers to `dart:core`. > > Make intent explicit for classes which are intended as interfaces, > or which are not intended to be subclassed. > > Mainly classes which are pure interfaces are marked as such, > and platform-specific classes not intended for subclassing > are made `final`. > > The `final` classes includes `BigInt`, which is written to assume > that arguments inherit its private members > (it runs `_ensureSystemBigInt` on arguments). > > It also includes the `Expando`, `WeakReference` and `Finalizer` classes, > which are just intended as stand-alone implementation classes for accessing > platform-specific functionality. > > Change-Id: Ib770c265edff127a289a67fe72d15b9ff0499407 > Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/287180 > Reviewed-by: Stephen Adams <sra@google.com> > Commit-Queue: Lasse Nielsen <lrn@google.com> > Reviewed-by: Aske Simon Christensen <askesc@google.com> > Reviewed-by: Nate Bosch <nbosch@google.com> > Reviewed-by: Martin Kustermann <kustermann@google.com> CoreLibraryReviewExempt: Accepted in original CL. Change-Id: Id713edede4228801bb097a64734be4f2187f51a9 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/288206 Reviewed-by: Aske Simon Christensen <askesc@google.com> Commit-Queue: Lasse Nielsen <lrn@google.com> Reviewed-by: Nate Bosch <nbosch@google.com> Reviewed-by: Martin Kustermann <kustermann@google.com>		2023-03-13 15:21:30 +00:00
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example
lib	Reland "Add more `interface` and `final` modifiers to `dart:core`."	2023-03-13 15:21:30 +00:00
test
.gitignore
pubspec.yaml
README.md

README.md

Sample code dart:ffi

This is an illustrative sample for how to use dart:ffi.

Prerequirement

For Windows, Linux, and MacOS, you should make sure, sqlite dev lib installed on your system.

Windows user can download dll from https://www.sqlite.org/download.html

If you do not have any sqlite3.dll or so file, you may found error message:

Unhandled exception:
Invalid argument(s): Failed to load dynamic library (126)
#0      _open (dart:ffi-patch/ffi_dynamic_library_patch.dart:13:55)
#1      new DynamicLibrary.open (dart:ffi-patch/ffi_dynamic_library_patch.dart:22:12)

Building and Running this Sample

Building and running this sample is done through pub. Running dart run example/main should produce the following output.

$ dart run example/main
1 Chocolade chip cookie Chocolade cookie foo
2 Ginger cookie null 42
3 Cinnamon roll null null
1 Chocolade chip cookie Chocolade cookie foo
2 Ginger cookie null 42
expected exception on accessing result data after close: The result has already been closed.
expected this query to fail: no such column: non_existing_column (Code 1: SQL logic error)

Tutorial

A tutorial walking through the code is available in docs/sqlite-tutorial.md. For information on how to use this package within a Flutter app, see docs/android.md. (Note: iOS is not yet supported).