How can I serialize an alloc::string::String or alloc::vec::Vec in no_std environment? #2070

wangtianxia-sjtu · 2021-08-10T07:24:10Z

How can I serialize an alloc::string::String or alloc::vec::Vec in no_std environment?
I have been using these two data structures in a no_std rust project, but I have encountered a problem that #[derive(Serialize, Deserialize)] cannot generate the proper function

#[derive(Serialize, Deserialize)]
pub(crate) struct Test {
    pub(crate) test: String, // this is alloc::string::String in no_std environment
}

error[E0277]: the trait bound `String: Serialize` is not satisfied
  --> src/image/mod.rs:36:5
   |
36 |     pub(crate) test: String,
   |     ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Serialize` is not implemented for `String`
   |
   = note: required by `image::_::_serde::ser::SerializeStruct::serialize_field`

error[E0277]: the trait bound `String: Deserialize<'_>` is not satisfied
  --> src/image/mod.rs:36:5
   |
36 |     pub(crate) test: String,
   |     ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `String`
   |
   = note: required by `next_element`

error[E0277]: the trait bound `String: Deserialize<'_>` is not satisfied
  --> src/image/mod.rs:36:5
   |
36 |     pub(crate) test: String,
   |     ^^^^^^^^^^^^^^^^^^^^^^^ the trait `Deserialize<'_>` is not implemented for `String`
   |
   = note: required by `next_value`

The text was updated successfully, but these errors were encountered:

dtolnay · 2022-01-23T00:53:41Z

Please take this question to one of the resources listed in https://github.com/serde-rs/serde/tree/v1.0.135#getting-help. Sorry that no one was able to provide guidance here.

dtolnay closed this as completed Jan 23, 2022

dtolnay added the support label Jan 23, 2022

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How can I serialize an alloc::string::String or alloc::vec::Vec in no_std environment? #2070

How can I serialize an alloc::string::String or alloc::vec::Vec in no_std environment? #2070

wangtianxia-sjtu commented Aug 10, 2021

dtolnay commented Jan 23, 2022

How can I serialize an alloc::string::String or alloc::vec::Vec in no_std environment? #2070

How can I serialize an alloc::string::String or alloc::vec::Vec in no_std environment? #2070

Comments

wangtianxia-sjtu commented Aug 10, 2021

dtolnay commented Jan 23, 2022