feat: add go bindgen

crates/loro-ffi/.gitignore

@@ -1,2 +1,3 @@
-examples/cpp/loro
+examples/loro
-examples/cpp/*.a
+examples/lib/*
+examples/loro_java

crates/loro-ffi/README.md

@@ -1,9 +1,39 @@
 # loro-ffi
 
 - `cargo build --release`
-- move `libloro.a` to directory `examples/cpp`
+- move `libloro.a` and `loro_ffi.h` to directory `examples/lib`
 - run
 
+## C++
+
+Read more: [cbindgen](https://github.com/eqrion/cbindgen)
+
 ```bash
 g++ loro.cpp -Bstatic -framework Security -L. -lloro -o loro
 ```
+
+## Go
+
+Read more: [cgo](https://pkg.go.dev/cmd/cgo)
+
+```bash
+go run main.go
+```
+
+## [Python](../loro-python/)
+
+## Java
+
+Candidates:
+
+- [Panama](https://jdk.java.net/panama/) [blog](https://jornvernee.github.io/java/panama/rust/panama-ffi/2021/09/03/rust-panama-helloworld.html)
+- [JNI](https://github.com/jni-rs/jni-rs)
+- [JNR](https://github.com/jnr/jnr-ffi)
+
+### Panama
+
+install panama-jdk and jextract
+
+```bash
+jextract -I /Library/Developer/CommandLineTools/usr/include/c++/v1 -I /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -d loro_java -t org.loro -l loro -- lib/loro_ffi.h
+```

crates/loro-ffi/examples/loro.cpp

@@ -1,6 +1,6 @@
 #include <stdio.h>
 extern "C" {
-    #include "../../target/loro_ffi.h"
+    #include "../target/loro_ffi.h"
 };
 
 int main(void) {

crates/loro-ffi/examples/main.go

@@ -0,0 +1,21 @@
+package main;
+
+
+
+/*
+#cgo LDFLAGS: -L./lib -framework Security -lloro
+#include "./lib/loro_ffi.h"
+*/
+import "C"
+import "fmt"
+
+func main() {
+	loro := C.loro_new();
+	text := C.loro_get_text(loro, C.CString("text"));
+	pos := C.uint(0);
+	C.text_insert(text, loro, &pos, C.CString("abc"));
+	value := C.text_value(text);
+	fmt.Println(C.GoString(value));
+	C.text_free(text);
+	C.loro_free(loro);
+}

crates/loro-ffi/src/lib.rs

@@ -1,9 +1,6 @@
 use std::ffi::{c_char, c_uint, CStr, CString};
 
-pub type LoroCore = loro_internal::LoroCore;
+use loro_internal::{LoroCore, Text};
-pub type Text = loro_internal::Text;
-pub type List = loro_internal::List;
-pub type Map = loro_internal::Map;
 
 /// create Loro with a random unique client id
 #[no_mangle]
@@ -47,7 +44,7 @@ pub unsafe extern "C" fn text_insert(
     let text = text.as_mut().unwrap();
     let ctx = ctx.as_ref().unwrap();
     let value = CStr::from_ptr(value).to_str().unwrap();
-    text.insert(ctx, pos as usize, value).unwrap();
+    text.insert(ctx, *pos as usize, value).unwrap();
 }
 
 #[no_mangle]

crates/loro-python/src/lib.rs

@@ -9,32 +9,6 @@ struct Loro(LoroCore);
 #[pyclass]
 struct LoroText(Text);
 
-impl Deref for Loro {
-    type Target = LoroCore;
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl DerefMut for Loro {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
-
-impl Deref for LoroText {
-    type Target = Text;
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-impl DerefMut for LoroText {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.0
-    }
-}
-
 #[pymethods]
 impl Loro {
     #[new]