Struct wasm_encoder::SymbolTable

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

A subsection of the linking custom section that provides extra information about the symbols present in this Wasm object file.

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impl SymbolTable

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pub fn new() -> Self

Construct a new symbol table subsection encoder.

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pub fn function( &mut self, flags: u32, index: u32, name: Option<&str>, ) -> &mut Self

Define a function symbol in this symbol table.

The name must be omitted if index references an imported table and the WASM_SYM_EXPLICIT_NAME flag is not set.

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pub fn global( &mut self, flags: u32, index: u32, name: Option<&str>, ) -> &mut Self

Define a global symbol in this symbol table.

The name must be omitted if index references an imported table and the WASM_SYM_EXPLICIT_NAME flag is not set.

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pub fn table(&mut self, flags: u32, index: u32, name: Option<&str>) -> &mut Self

Define a table symbol in this symbol table.

The name must be omitted if index references an imported table and the WASM_SYM_EXPLICIT_NAME flag is not set.

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pub fn data( &mut self, flags: u32, name: &str, definition: Option<DataSymbolDefinition>, ) -> &mut Self

Add a data symbol to this symbol table.

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pub const WASM_SYM_BINDING_WEAK: u32 = 1u32

This is a weak symbol.

This flag is mutually exclusive with WASM_SYM_BINDING_LOCAL.

When linking multiple modules defining the same symbol, all weak definitions are discarded if any strong definitions exist; then if multiple weak definitions exist all but one (unspecified) are discarded; and finally it is an error if more than one definition remains.

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pub const WASM_SYM_BINDING_LOCAL: u32 = 2u32

This is a local symbol.

This flag is mutually exclusive with WASM_SYM_BINDING_WEAK.

Local symbols are not to be exported, or linked to other modules/sections. The names of all non-local symbols must be unique, but the names of local symbols are not considered for uniqueness. A local function or global symbol cannot reference an import.

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pub const WASM_SYM_VISIBILITY_HIDDEN: u32 = 4u32

This is a hidden symbol.

Hidden symbols are not to be exported when performing the final link, but may be linked to other modules.

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pub const WASM_SYM_UNDEFINED: u32 = 16u32

This symbol is not defined.

For non-data symbols, this must match whether the symbol is an import or is defined; for data symbols, determines whether a segment is specified.

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pub const WASM_SYM_EXPORTED: u32 = 32u32

This symbol is intended to be exported from the wasm module to the host environment.

This differs from the visibility flags in that it effects the static linker.

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pub const WASM_SYM_EXPLICIT_NAME: u32 = 64u32

This symbol uses an explicit symbol name, rather than reusing the name from a wasm import.

This allows it to remap imports from foreign WebAssembly modules into local symbols with different names.

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pub const WASM_SYM_NO_STRIP: u32 = 128u32

This symbol is intended to be included in the linker output, regardless of whether it is used by the program.

Trait Implementations§

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impl Clone for SymbolTable

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fn clone(&self) -> SymbolTable

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 SymbolTable

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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 SymbolTable

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fn default() -> SymbolTable

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

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

Encode the type into the given byte sink.

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.