Module prelude 

Rust module prelude for Wasmtime crates.

Wasmtime crates that use no_std use core::prelude::* by default which does not include alloc-related functionality such as String and Vec. To have similar ergonomics to std and additionally group up some common functionality this module is intended to be imported at the top of all modules with:

use crate::*;

Externally for crates that depend on wasmtime-environ they should have this in the root of the crate:

use wasmtime_environ::prelude;

and then use crate::* works as usual.

Re-exports

pub use crate::collections::EntitySet;

Modules

vec

A contiguous growable array type with heap-allocated contents, written Vec<T>.

Macros

bail

Early exit from the current function with an error.

ensure

Ensure that a condition holds true, or else early exit from the current function with an error.

format

Creates a String using interpolation of runtime expressions.

format_err

Construct an Error via string formatting or another error.

vec

Creates a Vec containing the arguments.

Structs

Box

A pointer type that uniquely owns a heap allocation of type T.

Error

Wasmtime’s universal error type.

IndexMap

A hash table where the iteration order of the key-value pairs is independent of the hash values of the keys.

IndexSet

A default set of values.

String

A UTF-8–encoded, growable string.

Vec

A contiguous growable array type, written as Vec<T>, short for ‘vector’.

Traits

Context

Extension trait to add error context to results.

ToOwned

A generalization of Clone to borrowed data.

ToString

A trait for converting a value to a String.

TryNew

Extension trait providing fallible allocation for types like Arc<T> and Box<T>.

Functions

try_new

Helper function to invoke <T as TryNew>::try_new.

Type Aliases

Result

A result of either Ok(T) or an Err(Error).