wasmtime_environ

Trait TypeTrace

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pub trait TypeTrace {
    // Required methods
    fn trace<F, E>(&self, func: &mut F) -> Result<(), E>
       where F: FnMut(EngineOrModuleTypeIndex) -> Result<(), E>;
    fn trace_mut<F, E>(&mut self, func: &mut F) -> Result<(), E>
       where F: FnMut(&mut EngineOrModuleTypeIndex) -> Result<(), E>;

    // Provided methods
    fn trace_engine_indices<F, E>(&self, func: &mut F) -> Result<(), E>
       where F: FnMut(VMSharedTypeIndex) -> Result<(), E> { ... }
    fn canonicalize_for_runtime_usage<F>(&mut self, module_to_engine: &mut F)
       where F: FnMut(ModuleInternedTypeIndex) -> VMSharedTypeIndex { ... }
    fn is_canonicalized_for_runtime_usage(&self) -> bool { ... }
    fn canonicalize_for_hash_consing<F>(
        &mut self,
        rec_group_range: Range<ModuleInternedTypeIndex>,
        module_to_engine: &mut F,
    )
       where F: FnMut(ModuleInternedTypeIndex) -> VMSharedTypeIndex { ... }
    fn is_canonicalized_for_hash_consing(&self) -> bool { ... }
}
Expand description

A trait for things that can trace all type-to-type edges, aka all type indices within this thing.

Required Methods§

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fn trace<F, E>(&self, func: &mut F) -> Result<(), E>
where F: FnMut(EngineOrModuleTypeIndex) -> Result<(), E>,

Visit each edge.

The function can break out of tracing by returning Err(E).

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fn trace_mut<F, E>(&mut self, func: &mut F) -> Result<(), E>
where F: FnMut(&mut EngineOrModuleTypeIndex) -> Result<(), E>,

Visit each edge, mutably.

Allows updating edges.

The function can break out of tracing by returning Err(E).

Provided Methods§

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fn trace_engine_indices<F, E>(&self, func: &mut F) -> Result<(), E>
where F: FnMut(VMSharedTypeIndex) -> Result<(), E>,

Trace all VMSharedTypeIndex edges, ignoring other edges.

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fn canonicalize_for_runtime_usage<F>(&mut self, module_to_engine: &mut F)
where F: FnMut(ModuleInternedTypeIndex) -> VMSharedTypeIndex,

Canonicalize self by rewriting all type references inside self from module-level interned type indices to engine-level interned type indices.

This produces types that are suitable for usage by the runtime (only contains VMSharedTypeIndex type references).

This does not produce types that are suitable for hash consing types (must have recgroup-relative indices for type indices referencing other types in the same recgroup).

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fn is_canonicalized_for_runtime_usage(&self) -> bool

Is this type canonicalized for runtime usage?

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fn canonicalize_for_hash_consing<F>( &mut self, rec_group_range: Range<ModuleInternedTypeIndex>, module_to_engine: &mut F, )
where F: FnMut(ModuleInternedTypeIndex) -> VMSharedTypeIndex,

Canonicalize self by rewriting all type references inside self from module-level interned type indices to either engine-level interned type indices or recgroup-relative indices.

This produces types that are suitable for hash consing and deduplicating recgroups (types may have recgroup-relative indices for references to other types within the same recgroup).

This does not produce types that are suitable for usage by the runtime (only contain VMSharedTypeIndex type references).

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fn is_canonicalized_for_hash_consing(&self) -> bool

Is this type canonicalized for hash consing?

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§