Struct wasm_encoder::LinkingSection

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pub struct LinkingSection { /* private fields */ }
Expand description

An encoder for the linking custom section.

This section is a non-standard convention that is supported by the LLVM toolchain. It, along with associated “reloc.*” custom sections, allows you to treat a Wasm module as a low-level object file that can be linked with other Wasm object files to produce a final, complete Wasm module.

The linking section must come before the reloc sections.

§Example

use wasm_encoder::{LinkingSection, Module, SymbolTable};

// Create a new linking section.
let mut linking = LinkingSection::new();

// Define a symbol table.
let mut sym_tab = SymbolTable::new();

// Define a function symbol in the symbol table.
let flags = SymbolTable::WASM_SYM_BINDING_LOCAL | SymbolTable::WASM_SYM_EXPORTED;
let func_index = 42;
let sym_name = "my_exported_func";
sym_tab.function(flags, func_index, Some(sym_name));

// Add the symbol table to our linking section.
linking.symbol_table(&sym_tab);

// Add the linking section to a new Wasm module and get the encoded bytes.
let mut module = Module::new();
module.section(&linking);
let wasm_bytes = module.finish();

Implementations§

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impl LinkingSection

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pub fn new() -> Self

Construct a new encoder for the linking custom section.

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pub fn symbol_table(&mut self, symbol_table: &SymbolTable) -> &mut Self

Add a symbol table subsection.

Trait Implementations§

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impl Clone for LinkingSection

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fn clone(&self) -> LinkingSection

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for LinkingSection

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for LinkingSection

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Encode for LinkingSection

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fn encode(&self, sink: &mut Vec<u8>)

Encode the type into the given byte sink.
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impl Section for LinkingSection

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fn id(&self) -> u8

Gets the section identifier for this section.
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fn append_to(&self, dst: &mut Vec<u8>)

Appends this section to the specified destination list of bytes.

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.