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[jnigen] Enable implementing generic interfaces #1635

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merged 4 commits into from
Oct 8, 2024

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HosseinYousefi
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This was needed as the pedometer example actually uses generic methods in an interface: flutter/samples#2465 So I want to publish 0.12.1 after getting this merged.

For now every type other than a simple T where T is defined at the interface level like:

public interface Foo<T> { /* ... */ }

is going to be erased to JObject, for example U here:

<U> U foo(U u);

This is because, we don't know the correct type class for U at compile/generation time and also cannot provide from Java when we call the respective Dart method.

We could potentially use Dart extention types, I will research that approach further before 1.0: #1634

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pkgs/ffigen/example/libclang-example/generated_bindings.dart
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pkgs/ffigen/example/shared_bindings/lib/generated/base_gen.dart
pkgs/ffigen/example/simple/generated_bindings.dart
pkgs/ffigen/lib/src/header_parser/clang_bindings/clang_bindings.dart
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pkgs/ffigen/test/collision_tests/expected_bindings/_expected_reserved_keyword_collision_bindings.dart
pkgs/ffigen/test/header_parser_tests/expected_bindings/_expected_comment_markup_bindings.dart
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pkgs/jnigen/example/pdfbox_plugin/lib/pdfbox_plugin.dart
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coveralls commented Oct 7, 2024

Coverage Status

coverage: 90.382% (-0.09%) from 90.47%
when pulling 634b755 on enable-generic-interfaces
into 6595118 on main.

@HosseinYousefi HosseinYousefi linked an issue Oct 8, 2024 that may be closed by this pull request
@HosseinYousefi HosseinYousefi merged commit 290f21a into main Oct 8, 2024
23 of 25 checks passed
@HosseinYousefi HosseinYousefi deleted the enable-generic-interfaces branch October 8, 2024 11:24
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Support generic interface implementation
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