如何消除具有相同名称的特征之间的歧义？

Question

我正在尝试在运行时同时使用资产模块和余额模块。他们都导出了 Trait T::Balance。当我将 Assets 模块置于我的特征范围内时，如下所示：

pub trait Trait: assets::Trait + balances::Trait {}

我收到以下错误：

error[E0221]: ambiguous associated type `Balance` in bounds of `T`
   --> /home/volt/workspaces/lsaether/vyzer/runtime/src/markets.rs:124:42
    |
124 |         ValidityBond get(validity_bond): T::Balance;
    |                                          ^^^^^^^^^^ ambiguous associated type `Balance`
    |
note: associated type `T` could derive from `srml_assets::Trait`
   --> /home/volt/workspaces/lsaether/vyzer/runtime/src/markets.rs:124:42
    |
124 |         ValidityBond get(validity_bond): T::Balance;
    |                                          ^^^^^^^^^^
note: associated type `T` could derive from `srml_balances::Trait`
   --> /home/volt/workspaces/lsaether/vyzer/runtime/src/markets.rs:124:42
    |
124 |         ValidityBond get(validity_bond): T::Balance;
    |                                          ^^^^^^^^^^

Answer 1

而不是在这里使用 T::Balance，您需要更具体地了解 Rust 编译器。

您可以执行 <T as balances::Trait>::Balance 或 <T as assets::Trait>::Balance 来指定您实际想要使用的 "Balance"。

如果有帮助请告诉我！

如何消除具有相同名称的特征之间的歧义？

How to disambiguate between traits with the same name?

rust

substrate

parity-io