39e57e3e9a
* Migrate back to `std::` stylistically This commit moves away from idioms such as `alloc::` and `core::` as imports of standard data structures and types. Instead it migrates all crates to uniformly use `std::` for importing standard data structures and types. This also removes the `std` and `core` features from all crates to and removes any conditional checking for `feature = "std"` All of this support was previously added in #407 in an effort to make wasmtime/cranelift "`no_std` compatible". Unfortunately though this change comes at a cost: * The usage of `alloc` and `core` isn't idiomatic. Especially trying to dual between types like `HashMap` from `std` as well as from `hashbrown` causes imports to be surprising in some cases. * Unfortunately there was no CI check that crates were `no_std`, so none of them actually were. Many crates still imported from `std` or depended on crates that used `std`. It's important to note, however, that **this does not mean that wasmtime will not run in embedded environments**. The style of the code today and idioms aren't ready in Rust to support this degree of multiplexing and makes it somewhat difficult to keep up with the style of `wasmtime`. Instead it's intended that embedded runtime support will be added as necessary. Currently only `std` is necessary to build `wasmtime`, and platforms that natively need to execute `wasmtime` will need to use a Rust target that supports `std`. Note though that not all of `std` needs to be supported, but instead much of it could be configured off to return errors, and `wasmtime` would be configured to gracefully handle errors. The goal of this PR is to move `wasmtime` back to idiomatic usage of features/`std`/imports/etc and help development in the short-term. Long-term when platform concerns arise (if any) they can be addressed by moving back to `no_std` crates (but fixing the issues mentioned above) or ensuring that the target in Rust has `std` available. * Start filling out platform support doc
28 lines
539 B
Rust
28 lines
539 B
Rust
//! Wasmtime embed API. Based on wasm-c-api.
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#![allow(improper_ctypes)]
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mod callable;
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mod context;
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mod externals;
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mod instance;
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mod module;
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mod r#ref;
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mod runtime;
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mod trampoline;
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mod trap;
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mod types;
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mod values;
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pub mod wasm;
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pub use crate::callable::Callable;
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pub use crate::externals::*;
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pub use crate::instance::Instance;
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pub use crate::module::Module;
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pub use crate::r#ref::{AnyRef, HostInfo, HostRef};
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pub use crate::runtime::{Config, Engine, Store};
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pub use crate::trap::Trap;
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pub use crate::types::*;
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pub use crate::values::*;
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