commit | 3884e8cb987eb6e0b8d4e0cdbb48a06dc68afc77 | [log] [tgz] |
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author | Elias Naur <elias.naur@gmail.com> | Mon Jan 16 14:08:12 2017 +0100 |
committer | Elias Naur <elias.naur@gmail.com> | Tue Jan 17 14:03:33 2017 +0000 |
tree | 9a676797d356e528570189f4b93b8628989ff65a | |
parent | 1aa9ad5c48a8facedf1b6e02d570f188d8b7d336 [diff] |
internal,bind: resolve overloaded methods at runtime Before this CL, calling overloaded methods on reverse bound Java classes and interfaces involved confusing and ugly name mangling. If a set of methods with the same name differed only in argument count, the mangling was simply adding the argument count to the name: func F() func F1(int32) But if two or more methods had the same number of arguments, the type had to be appended: func (...) F() int32 func (...) F1(int32) (int32, error) func (...) F__I(int32, int32) func (...) F__JLjava_util_concurrent_TimeUnit_2(int64, concurrent.TimeUnit) This CL sacrifices a bit of type safety and performance to regain the convenience and simplicity of Go by resolving overloaded method dispatch at runtime. Overloaded Java methods are combined to one Go method that, when invoked, determines the correct Java method variant at runtime. The signature of the Go method is compatible with every Java method with that name. For the example above, the single Go method becomes the most general func (...) F(...interface{}) (interface{}, error) The method is variadic to cover function with a varying number of arguments, and it returns interface{} to cover int32, int64 and no argument. Finally, it returns an error to cover the variant that returns an error. The generator tries to be specific; for example func G1(int32) int32 func G2(int32, int32) int32 becomes func G(int32, ...int32) int32 Overriding Java methods in Go is changed to use the Go parameter types to determine to correct Java method. To avoid name clashes when overriding multiple overloaded methods, trailing underscores in the method name are ignored when matching Java methods. See the Get methods of GoFuture in bind/testpkg/javapkg for an example. Change-Id: I6ac3e024141daa8fc2c35187865c5d7a63368094 Reviewed-on: https://go-review.googlesource.com/35186 Reviewed-by: David Crawshaw <crawshaw@golang.org>
The Go mobile repository holds packages and build tools for using Go on mobile platforms.
Package documentation as a starting point:
The Go Mobile project is experimental. Use this at your own risk. While we are working hard to improve it, neither Google nor the Go team can provide end-user support.
This is early work and installing the build system requires Go 1.5. Follow the instructions on golang.org/wiki/Mobile to install the gomobile command, build the basic and the bind example apps.
Contributions to Go are appreciated. See https://golang.org/doc/contribute.html.