Merge pull request #1008 from godot-rust/bugfix/decl-macro-generated

Test generation of proc-macro code via declarative macro

Author: Bromeon

.github/other/public-docs-token.txt

@@ -1 +1 @@
-MTFBQUZNN0NBMHpNWHlZeVBFZUl1bl9kdm5NOUV3RkZlVll6RVhNeGpvaHFVR1pyd1BSWUxjQ3cyYzFlUnZmR2VRRDZBUjJWT0NpdTRRSWVuUgo=
+MTFBQUZNN0NBMGdXTnFGVGZ4SHA3UV9NMjlrUlljMm80cHUwYzNPbEM3b1V1WkhMTXZrT2R0aDRzTlF1cVZ6dkZBSTdSQkM3WEYzME5MQ0VuNAo=

godot-macros/Cargo.toml

@@ -22,10 +22,10 @@ proc-macro = true
 # Minimum versions compatible with -Zminimal-versions
 proc-macro2 = "1.0.80" # Literal::c_string() added in 1.0.80.
 quote = "1.0.29"
-
-# Enabled by `docs`
+# Enabled by `docs`.
 markdown = { version = "=1.0.0-alpha.21", optional = true }
-venial = "0.6"
+# Requires bugfixes from 0.6.1.
+venial = "0.6.1"
 
 [build-dependencies]
 godot-bindings = { path = "../godot-bindings", version = "=0.2.3" } # emit_godot_version_cfg

itest/rust/src/engine_tests/codegen_test.rs

@@ -128,3 +128,45 @@ impl CodegenTest2 {
     #[func(virtual)]
     fn with_virtual_many_unnamed(&self, _: i32, _: GString) {}
 }
+
+// ----------------------------------------------------------------------------------------------------------------------------------------------
+// Generation of APIs via declarative macro.
+
+macro_rules! make_class {
+    ($ClassName:ident, $BaseName:ident) => {
+        #[derive(GodotClass)]
+        #[class(no_init, base=$BaseName)]
+        pub struct $ClassName {
+            base: Base<godot::classes::$BaseName>,
+        }
+    };
+}
+
+macro_rules! make_interface_impl {
+    ($Class:ty, $Trait:path) => {
+        #[godot_api]
+        #[allow(unused)]
+        impl $Trait for $Class {
+            fn init(base: Base<Self::Base>) -> Self {
+                Self { base }
+            }
+
+            fn process(&mut self, _: f64) {}
+        }
+    };
+}
+
+macro_rules! make_user_api {
+    ($Class:ty, $method:ident, $Param:ty) => {
+        #[godot_api]
+        #[allow(unused)]
+        impl $Class {
+            #[func]
+            fn $method(&self, _m: $Param) {}
+        }
+    };
+}
+
+make_class!(CodegenTest3, Node3D);
+make_interface_impl!(CodegenTest3, INode3D);
+make_user_api!(CodegenTest3, take_param, i32);