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//! The WebAssembly possible errors
use thiserror::Error;
pub use wasmer_types::ImportError;
#[cfg(not(target_arch = "wasm32"))]
use wasmer_vm::Trap;
/// The WebAssembly.LinkError object indicates an error during
/// module instantiation (besides traps from the start function).
///
/// This is based on the [link error][link-error] API.
///
/// [link-error]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WebAssembly/LinkError
#[derive(Error, Debug)]
#[error("Link error: {0}")]
pub enum LinkError {
/// An error occurred when checking the import types.
#[error("Error while importing {0:?}.{1:?}: {2}")]
Import(String, String, ImportError),
#[cfg(not(target_arch = "wasm32"))]
/// A trap ocurred during linking.
#[error("Trap occurred during linking: {0}")]
Trap(#[source] Trap),
/// Insufficient resources available for linking.
#[error("Insufficient resources: {0}")]
Resource(String),
}
/// An error while instantiating a module.
///
/// This is not a common WebAssembly error, however
/// we need to differentiate from a `LinkError` (an error
/// that happens while linking, on instantiation) and a
/// Trap that occurs when calling the WebAssembly module
/// start function.
#[derive(Error, Debug)]
pub enum InstantiationError {
/// A linking ocurred during instantiation.
#[error(transparent)]
Link(LinkError),
/// The module was compiled with a CPU feature that is not available on
/// the current host.
#[error("module compiled with CPU feature that is missing from host")]
CpuFeature(String),
/// A runtime error occured while invoking the start function
#[cfg(not(target_arch = "wasm32"))]
#[error(transparent)]
Start(Trap),
}