Fix: Replace Self to Context in the trait path for #[cgp_impl]

crates/cgp-macro-lib/src/cgp_impl/transform.rs

@@ -41,7 +41,11 @@ pub fn transform_impl_trait(
     let mut out_impl: ItemImpl = parse2(raw_out_impl)?;
     out_impl.self_ty = Box::new(provider_type.clone());
 
-    let mut provider_trait_path: SimpleType = consumer_trait_path.clone();
+    let mut provider_trait_path: SimpleType = parse2(replace_self_type(
+        consumer_trait_path.to_token_stream(),
+        context_type.to_token_stream(),
+        &local_assoc_types,
+    ))?;
 
     match &mut provider_trait_path.generics {
         Some(generics) => {

crates/cgp-tests/tests/component_tests/abstract_types/generics.rs

@@ -0,0 +1,14 @@
+use cgp::prelude::*;
+
+#[cgp_component(FooProvider)]
+pub trait Foo<T> {
+    fn foo(&self, value: &T);
+}
+
+// Test that the `Error` parameter in `FooProvider<Error>`
+// is desugared correctly into `Context::Error` and not `Self::Error`
+#[cgp_impl(new FooError)]
+#[use_type(HasErrorType::Error)]
+impl FooProvider<Error> {
+    fn foo(&self, _value: &Error) {}
+}

crates/cgp-tests/tests/component_tests/abstract_types/mod.rs

@@ -1,4 +1,5 @@
 pub mod basic;
 pub mod extend;
 pub mod foreign;
+pub mod generics;
 pub mod self_referential;