Struct wasmedge_sys::instance::function::FuncType

pub struct FuncType { /* private fields */ }

Defines the type of a host function.

A WasmEdge FuncType classifies the signature of a Function, including the type information of both the arguments and the returns.

Implementations

impl FuncType

pub fn create<I: IntoIterator<Item = ValType>, R: IntoIterator<Item = ValType>>( args: I, returns: R ) -> WasmEdgeResult<Self>

Create a new FuncType to be associated with the given arguments and returns.

Arguments

• args - The argument types of a Function.

• returns - The types of the returns of a Function.

Error

If fail to create a FuncType, then an error is returned.

Example

use wasmedge_sys::FuncType;
use wasmedge_types::ValType;

let func_ty = FuncType::create(vec![ValType::I32;2], vec![ValType::I32]).expect("fail to create a FuncType");

pub fn params_len(&self) -> u32

Returns the number of the arguments of a Function.

pub fn params_type_iter(&self) -> impl Iterator<Item = ValType>

Returns an Iterator of the arguments of a Function.

pub fn returns_len(&self) -> u32

Returns the number of the returns of a Function.

pub fn returns_type_iter(&self) -> impl Iterator<Item = ValType>

Returns an Iterator of the return types of a Function.

pub fn as_ptr(&self) -> *const WasmEdge_FunctionTypeContext

Available on crate feature ffi only.

Provides a raw pointer to the inner function type context.

Trait Implementations

impl Debug for FuncType

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

Formats the value using the given formatter.

impl Drop for FuncType

fn drop(&mut self)

Executes the destructor for this type.

impl From<FuncType> for FuncType

fn from(ty: FuncType) -> Self

Converts to this type from the input type.

impl From<FuncType> for FuncType

fn from(ty: FuncType) -> Self

Converts to this type from the input type.