Struct VmCaller

pub struct VmCaller<'a, T>(pub Option<Caller<'a, T>>);

The VmCallerEnv trait is similar to the Env trait – it provides all the same-named methods – but they have a form that takes an initial VmCaller argument by &mut that may or may-not wrap a wasmi::Caller structure, depending on whether it was invoked from a wasmi host-function wrapper.

There is a blanket impl<T:VmCallerEnv> Env for T so that any type (eg. Host) that implements VmCallerEnv automatically also implements Env, just by calling the corresponding VmCallerEnv method with the VmCaller::none() argument. This allows code to import and use Env directly (such as the native contract) to call host methods without having to write VmCaller::none() everywhere.

Tuple Fields

0: Option<Caller<'a, T>>

Implementations

impl<'a, T> VmCaller<'a, T>

pub fn none() -> Self

pub fn try_ref(&self) -> Result<&Caller<'a, T>, Error>

pub fn try_mut(&mut self) -> Result<&mut Caller<'a, T>, Error>