无法在Rust中打印过程宏函数声明

我正在使用一个

proc\u宏

，想打印一些详细信息以便调试。

println语句不打印任何内容

这是宏调用：

decl_module! {

    /// The module declaration.
    pub struct Module<T: Trait> for enum Call where origin: T::Origin {
        // A default function for depositing events
        fn deposit_event() = default;

        /// Allow a user to claim ownership of an unclaimed proof
        fn create_claim(origin, proof: Vec<u8>) -> DispatchResult {
            // Verify that the incoming transaction is signed and store who the
            // caller of this function is.
            let sender = ensure_signed(origin)?;
            println!("send is: {}", sender);

            // Verify that the specified proof has not been claimed yet or error with the message
            ensure!(!Proofs::<T>::exists(&proof), "This proof has already been claimed.");

            // Call the `system` pallet to get the current block number
            let current_block = <system::Module<T>>::block_number();

            // Store the proof with the sender and the current block number
            Proofs::<T>::insert(&proof, (sender.clone(), current_block));

            // Emit an event that the claim was created
            Self::deposit_event(RawEvent::ClaimCreated(sender, proof));
            Ok(())
        }

        /// Allow the owner to revoke their claim
        fn revoke_claim(origin, proof: Vec<u8>) -> DispatchResult {
            // Determine who is calling the function
            let sender = ensure_signed(origin)?;

            // Verify that the specified proof has been claimed
            ensure!(Proofs::<T>::exists(&proof), "This proof has not been stored yet.");

            // Get owner of the claim
            let (owner, _) = Proofs::<T>::get(&proof);

            // Verify that sender of the current call is the claim owner
            ensure!(sender == owner, "You must own this claim to revoke it.");

            // Remove claim from storage
            Proofs::<T>::remove(&proof);

            // Emit an event that the claim was erased
            Self::deposit_event(RawEvent::ClaimRevoked(sender, proof));
            Ok(())
        }
    }
}


我正在终端（或任何地方）运行区块链（Polkadot dApp），无法看到输出消息。注意：一切正常，但无法打印。
此宏调用生成包含打印语句的代码。它不运行该代码。在运行代码并调用
create\u claim
之前，您不会看到打印输出

如果您想调试宏调用，举例来说，宏有几种，但我不知道它们是否也适用于过程宏，或者是否有等效的宏。
宏不会以任何方式影响打印。您的问题来自其他地方。我知道您没有看到输出。但我告诉你，你没有朝着正确的方向去解决你的问题。“如何在Rust中打印过程宏函数声明？”的唯一可能答案是“常规方式”。程序宏不关心打印，所以您的问题不是由程序宏引起的。现在这个问题看起来还好吗？
println!("send is: {}", sender);