"Unresolved link to i" when brackets are present in C/C++ comments

[nwmqpa]

/**
 * Requests SpatialOS to create an entity. If components[i].schema_type is set, ownership is
 * transferred to the SDK, and components[i].schema_type is set to NULL. If
 * components[i].schema_type is NULL and components[i].user_handle is set, the entity data is
 * serialized immediately using the corresponding vtable serialize function.
 *
 * Returns Worker_RequestId -1 if the component is not registered and the default vtable is
 * not found.
 */
int64_t Worker_Connection_SendCreateEntityRequest(void* connection, uint32_t component_count, void* components, const void* entity_id, const uint32_t* timeout_millis);

Bindgen Invocation

bindgen::Builder::default()
            .header(
                path.clone()
                    .as_ref()
                    .join("dependencies/worker_sdk/headers/include/improbable/c_schema.h")
                    .to_str()
                    .expect("Can't convert path to utf-8")
                    .to_string(),
            )
            .header(
                path.clone()
                    .as_ref()
                    .join("dependencies/worker_sdk/headers/include/improbable/c_worker.h")
                    .to_str()
                    .expect("Can't convert path to utf-8")
                    .to_string(),
            )
            .header(
                path.clone()
                    .as_ref()
                    .join("dependencies/worker_sdk/headers/include/improbable/ngrpc.h")
                    .to_str()
                    .expect("Can't convert path to utf-8")
                    .to_string(),
            )
            .clang_args(&[
                &target
            ])
            .rustified_enum("*")
            .parse_callbacks(Box::new(bindgen::CargoCallbacks))
            .generate()
            .expect("Unable to generate bindings");

Actual Results

extern "C" {
    #[doc = " Requests SpatialOS to create an entity. If components[i].schema_type is set, ownership is"]
    #[doc = " transferred to the SDK, and components[i].schema_type is set to NULL. If"]
    #[doc = " components[i].schema_type is NULL and components[i].user_handle is set, the entity data is"]
    #[doc = " serialized immediately using the corresponding vtable serialize function."]
    #[doc = ""]
    #[doc = " Returns Worker_RequestId -1 if the component is not registered and the default vtable is"]
    #[doc = " not found."]
    pub fn Worker_Connection_SendCreateEntityRequest(
        connection: *mut ::std::os::raw::c_void,
        component_count: u32,
        components: *mut ::std::os::raw::c_void,
        entity_id: *const ::std::os::raw::c_void,
        timeout_millis: *const u32,
    ) -> i64;
}

Expected Results

extern "C" {
    #[doc = " Requests SpatialOS to create an entity. If components\[i\].schema_type is set, ownership is"]
    #[doc = " transferred to the SDK, and components\[i\].schema_type is set to NULL. If"]
    #[doc = " components\[i\].schema_type is NULL and components\[i\].user_handle is set, the entity data is"]
    #[doc = " serialized immediately using the corresponding vtable serialize function."]
    #[doc = ""]
    #[doc = " Returns Worker_RequestId -1 if the component is not registered and the default vtable is"]
    #[doc = " not found."]
    pub fn Worker_Connection_SendCreateEntityRequest(
        connection: *mut ::std::os::raw::c_void,
        component_count: u32,
        components: *mut ::std::os::raw::c_void,
        entity_id: *const ::std::os::raw::c_void,
        timeout_millis: *const u32,
    ) -> i64;
}

Due to a change in rust documentation generator, we now have the possibility to use scoped variable inside documentation by specifying it between brackets. However, when transpiling C/C++ Headers, this lead to the apparition of multiple warnings, due to the fact that this isn't a C behaviour.

The warning message in my case is

warning: unresolved link to `i`
    --> /home/tnicollet/Workspace/Project-StarDust/spatialos-sys/target/debug/build/spatialos-sys-bdfde63f736b4f18/out/bindings.rs:7900:5
     |
7900 | /     #[doc = " Requests SpatialOS to create an entity. If components[i].schema_type is set, ownership is"]
7901 | |     #[doc = " transferred to the SDK, and components[i].schema_type is set to NULL. If"]
7902 | |     #[doc = " components[i].schema_type is NULL and components[i].user_handle is set, the entity data is"]
7903 | |     #[doc = " serialized immediately using the corresponding vtable serialize function."]
7904 | |     #[doc = ""]
7905 | |     #[doc = " Returns Worker_RequestId -1 if the component is not registered and the default vtable is"]
7906 | |     #[doc = " not found."]
     | |__________________________^
     |
     = note: the link appears in this line:

             Requests SpatialOS to create an entity. If components[i].schema_type is set, ownership is
                                                                   ^
     = note: the module `ffi` contains no item named `i`
     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`

[pvdrz]

This can be fixed by providing a ParseCallbacks implementor now: #2347