On Mon, 26 Jun 2023 15:42:42 +0800
"Qingsong Chen" <[email protected]> wrote:
> If the trait has same function name, the `vtable` macro
> will redefine its `gen_const_name`, e.g.:
> ```rust
> #[vtable]
> pub trait Foo {
> #[cfg(CONFIG_X)]
> fn bar();
>
> #[cfg(not(CONFIG_X))]
> fn bar(x: usize);
> }
> ```
> Use `HashSet` to avoid this.
>
> Signed-off-by: Qingsong Chen <[email protected]>
Reviewed-by: Gary Guo <[email protected]>
> ---
> rust/macros/vtable.rs | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/rust/macros/vtable.rs b/rust/macros/vtable.rs
> index 34d5e7fb5768..08eb0355f99b 100644
> --- a/rust/macros/vtable.rs
> +++ b/rust/macros/vtable.rs
> @@ -27,7 +27,7 @@ pub(crate) fn vtable(_attr: TokenStream, ts: TokenStream) -> TokenStream {
> };
>
> let mut body_it = body.stream().into_iter();
> - let mut functions = Vec::new();
> + let mut functions = HashSet::new();
> let mut consts = HashSet::new();
> while let Some(token) = body_it.next() {
> match token {
> @@ -37,7 +37,7 @@ pub(crate) fn vtable(_attr: TokenStream, ts: TokenStream) -> TokenStream {
> // Possibly we've encountered a fn pointer type instead.
> _ => continue,
> };
> - functions.push(fn_name);
> + functions.insert(fn_name);
> }
> TokenTree::Ident(ident) if ident.to_string() == "const" => {
> let const_name = match body_it.next() {