From beea4e31c900b85b5891642880a7a0203563414c Mon Sep 17 00:00:00 2001
From: Alex Beregszaszi <alex@rtfs.hu>
Date: Tue, 25 Jun 2019 12:35:51 +0100
Subject: [PATCH] rust: implement Deref trait for EvmcContainer

---
 bindings/rust/evmc-declare/src/lib.rs  |  2 ++
 bindings/rust/evmc-vm/src/container.rs | 16 +++++++++++-----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/bindings/rust/evmc-declare/src/lib.rs b/bindings/rust/evmc-declare/src/lib.rs
index 4ea20c995..d58de0074 100644
--- a/bindings/rust/evmc-declare/src/lib.rs
+++ b/bindings/rust/evmc-declare/src/lib.rs
@@ -334,6 +334,8 @@ fn build_execute_fn(names: &VMNameSet) -> proc_macro2::TokenStream {
             code_size: usize
         ) -> ::evmc_vm::ffi::evmc_result
         {
+            use evmc_vm::EvmcVm;
+
             assert!(!msg.is_null());
             assert!(!context.is_null());
             assert!(!instance.is_null());
diff --git a/bindings/rust/evmc-vm/src/container.rs b/bindings/rust/evmc-vm/src/container.rs
index a8af3400d..e81d0c69c 100644
--- a/bindings/rust/evmc-vm/src/container.rs
+++ b/bindings/rust/evmc-vm/src/container.rs
@@ -4,8 +4,8 @@
  */
 
 use crate::EvmcVm;
-use crate::ExecutionContext;
-use crate::ExecutionResult;
+
+use std::ops::Deref;
 
 /// Container struct for EVMC instances and user-defined data.
 pub struct EvmcContainer<T: EvmcVm + Sized> {
@@ -33,9 +33,15 @@ impl<T: EvmcVm + Sized> EvmcContainer<T> {
     pub unsafe fn into_ffi_pointer(boxed: Box<Self>) -> *const ::evmc_sys::evmc_instance {
         Box::into_raw(boxed) as *const ::evmc_sys::evmc_instance
     }
+}
+
+impl<T> Deref for EvmcContainer<T>
+where
+    T: EvmcVm,
+{
+    type Target = T;
 
-    // TODO: Maybe this can just be done with the Deref<Target = T> trait.
-    pub fn execute(&self, code: &[u8], context: &ExecutionContext) -> ExecutionResult {
-        self.vm.execute(code, context)
+    fn deref(&self) -> &Self::Target {
+        &self.vm
     }
 }