Struct metered_wasmi::Signature

pub struct Signature { /* fields omitted */ }

Signature of a function.

Signature of a function consists of zero or more parameter types and zero or one return type.

Two signatures are considered equal if they have equal list of parameters and equal return types.

Methods

impl Signature

pub fn new<C: Into<Cow<'static, [ValueType]>>>(
    params: C,
    return_type: Option<ValueType>
) -> Signature

Creates new signature with givens parameter types and optional return type.

Examples

use metered_wasmi::{Signature, ValueType};

// s1: (i32) -> ()
let s1 = Signature::new(&[ValueType::I32][..], None);

// s2: () -> i32
let s2 = Signature::new(&[][..], Some(ValueType::I32));

// s3: (I64) -> ()
let dynamic_params = vec![ValueType::I64];
let s3 = Signature::new(dynamic_params, None);

pub fn params(&self) -> &[ValueType]

Returns parameter types of this signature.

pub fn return_type(&self) -> Option<ValueType>

Returns return type of this signature.

Trait Implementations

impl PartialEq<Signature> for Signature

fn eq(&self, other: &Signature) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Signature) -> bool

This method tests for !=.

impl Clone for Signature

fn clone(&self) -> Signature

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Eq for Signature

impl Debug for Signature

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

Formats the value using the given formatter.