Remove unnecessary ValueDebugFormat item, hide Vc field (vercel/turbo…

…repo#5567)

### Description

This removes unnecessary items from the IDE's autosuggestion.

I'd also like to get rid of all the `*_inline` suggestions, but RA will
ignore `#[doc(hidden)]` when inside the same crate. I don't think
there's a way to indicate "never, ever suggest this item". We could move
some of these to be private to some generated module, but that module
would probably still show up as a top level suggestion.

### Testing Instructions

Automated tests.

crates/turbo-tasks-macros/src/derive/value_debug_format_macro.rs

@@ -33,29 +33,18 @@ pub fn derive_value_debug_format(input: TokenStream) -> TokenStream {
     let formatting_logic =
         match_expansion(&derive_input, &format_named, &format_unnamed, &format_unit);
 
-    let value_debug_format_ident = get_value_debug_format_ident(ident);
-
     quote! {
-        #[doc(hidden)]
-        impl #impl_generics #ident #ty_generics #where_clause {
-            #[doc(hidden)]
-            #[allow(non_snake_case)]
-            async fn #value_debug_format_ident(&self, depth: usize) -> anyhow::Result<turbo_tasks::Vc<turbo_tasks::debug::ValueDebugString>> {
-                if depth == 0 {
-                    return Ok(turbo_tasks::debug::ValueDebugString::new(stringify!(#ident).to_string()));
-                }
-
-                use turbo_tasks::debug::internal::*;
-                use turbo_tasks::debug::ValueDebugFormat;
-                Ok(turbo_tasks::debug::ValueDebugString::new(format!("{:#?}", #formatting_logic)))
-            }
-        }
-
         impl #impl_generics turbo_tasks::debug::ValueDebugFormat for #ident #ty_generics #where_clause {
             fn value_debug_format<'a>(&'a self, depth: usize) -> turbo_tasks::debug::ValueDebugFormatString<'a> {
                 turbo_tasks::debug::ValueDebugFormatString::Async(
                     Box::pin(async move {
-                        Ok(self.#value_debug_format_ident(depth).await?.await?.to_string())
+                        if depth == 0 {
+                            return Ok(stringify!(#ident).to_string());
+                        }
+
+                        use turbo_tasks::debug::internal::*;
+                        use turbo_tasks::debug::ValueDebugFormat;
+                        Ok(format!("{:#?}", #formatting_logic))
                     })
                 )
             }
@@ -122,7 +111,3 @@ fn format_unit(ident: &Ident) -> (TokenStream2, TokenStream2) {
         },
     )
 }
-
-pub(crate) fn get_value_debug_format_ident(ident: &Ident) -> Ident {
-    Ident::new(&format!("__value_debug_format_{}", ident), ident.span())
-}

crates/turbo-tasks-macros/src/derive/value_debug_macro.rs

@@ -2,27 +2,24 @@ use proc_macro::TokenStream;
 use quote::quote;
 use syn::{parse_macro_input, DeriveInput};
 
-use super::value_debug_format_macro::get_value_debug_format_ident;
-
 /// This macro generates the implementation of the `ValueDebug` trait for a
 /// given type.
 ///
 /// This requires the type to implement the `ValueDebugFormat` trait.
 pub fn derive_value_debug(input: TokenStream) -> TokenStream {
     let derive_input = parse_macro_input!(input as DeriveInput);
     let ident = &derive_input.ident;
-    let value_debug_format_ident = get_value_debug_format_ident(ident);
     quote! {
         #[turbo_tasks::value_impl]
         impl turbo_tasks::debug::ValueDebug for #ident {
             #[turbo_tasks::function]
             async fn dbg(&self) -> anyhow::Result<turbo_tasks::Vc<turbo_tasks::debug::ValueDebugString>> {
-                self.#value_debug_format_ident(usize::MAX).await
+                turbo_tasks::debug::ValueDebugFormat::value_debug_format(self, usize::MAX).try_to_value_debug_string().await
             }
 
             #[turbo_tasks::function]
             async fn dbg_depth(&self, depth: usize) -> anyhow::Result<turbo_tasks::Vc<turbo_tasks::debug::ValueDebugString>> {
-                self.#value_debug_format_ident(depth).await
+                turbo_tasks::debug::ValueDebugFormat::value_debug_format(self, depth).try_to_value_debug_string().await
             }
         }
     }

crates/turbo-tasks/src/vc/mod.rs

@@ -44,6 +44,7 @@ where
     // accessible.
     #[doc(hidden)]
     pub node: RawVc,
+    #[doc(hidden)]
     pub(crate) _t: PhantomData<T>,
 }