extract codegen into macro-rules macros (#185)

* extract a `setup_class` macro

The procedural macro now generates a call to
`setup_class!` which generates the actual code.

* copious comments

* move constructor definition to a macro-rules macro

* introduce setup_constructor macro

* add a devcontainer

* wip

* extract `setup_op_method`

* extract `setup_obj_method`

* extract `setup_static_method` into a macro

* extract `setup_inherent_object_method`

* extract setup_static_field_getter

* pass in "token tree" description of java type

We used to process types in many ways and pass
in a number of various. We now generate most of
those in declarative macro-rules logic in
`java_types.rs` so that we can just pass in
token tree description of the java type and
let the rest of the code work.

* move jni field function to macro-rules

* extract `jni_call_fn` into macro-rules

* extract `jni_static_call_fn` to macro-rules

* extract `prepare_inputs` into macro-rules

This lets us avoid the grodiness of having
to pass in the self identifier.

* break out java-types macros into their own files

makes it easier to find them.

also, improve comments.

* document macro-if and move to separate file

---------

Co-authored-by: Niko Matsakis <[email protected]>

.devcontainer/devcontainer.json

@@ -0,0 +1,36 @@
+// For format details, see https://aka.ms/devcontainer.json. For config options, see the
+// README at: https://github.com/devcontainers/templates/tree/main/src/rust
+{
+	"name": "Rust",
+	// Or use a Dockerfile or Docker Compose file. More info: https://containers.dev/guide/dockerfile
+	"image": "mcr.microsoft.com/devcontainers/rust:1-1-bullseye",
+	"features": {
+		"ghcr.io/devcontainers/features/java:1": {},
+		"ghcr.io/mikaello/devcontainer-features/kotlinc:1": {},
+		"ghcr.io/guiyomh/features/just:0": {}
+	}
+
+	// Use 'mounts' to make the cargo cache persistent in a Docker Volume.
+	// "mounts": [
+	// 	{
+	// 		"source": "devcontainer-cargo-cache-${devcontainerId}",
+	// 		"target": "/usr/local/cargo",
+	// 		"type": "volume"
+	// 	}
+	// ]
+
+	// Features to add to the dev container. More info: https://containers.dev/features.
+	// "features": {},
+
+	// Use 'forwardPorts' to make a list of ports inside the container available locally.
+	// "forwardPorts": [],
+
+	// Use 'postCreateCommand' to run commands after the container is created.
+	// "postCreateCommand": "rustc --version",
+
+	// Configure tool-specific properties.
+	// "customizations": {},
+
+	// Uncomment to connect as root instead. More info: https://aka.ms/dev-containers-non-root.
+	// "remoteUser": "root"
+}

Cargo.toml

@@ -1,5 +1,5 @@
 [workspace]
-members = ["duchess-reflect"]
+members = ["duchess-reflect", "macro-rules"]
 
 [workspace.package]
 version = "0.3.0"
@@ -20,6 +20,7 @@ readme = "README.md"
 [dependencies]
 derive_more = "0.99.17"
 duchess-macro = { path = "macro", version = "0.3.0" }
+duchess-macro-rules = { version = "0.3.0", path = "macro-rules" }
 jni-sys = "0.3.0"
 cesu8 = "1.1.0"
 once_cell = "1.17.1"
@@ -29,6 +30,7 @@ java-locator = { version = "0.1.3", optional = true }
 libloading = { version = "0.8.0", optional = true }
 derive-where = "1.2.1"
 
+
 [features]
 default = ["dylibjvm"]
 dylibjvm = ["java-locator", "libloading"]