Make automatically the trait Into<Engine> conversions

examples/imports_function_env_global.rs

@@ -92,7 +92,8 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
 
         let global_count = data.g_counter.get(&mut storemut).unwrap_i32();
         data.g_counter
-            .set(&mut storemut, Value::I32(global_count + add));
+            .set(&mut storemut, Value::I32(global_count + add))
+            .unwrap();
 
         *counter_ref += add;
         *counter_ref

examples/tunables_limit_memory.rs

@@ -8,7 +8,7 @@ use wasmer::{
 };
 use wasmer_compiler_cranelift::Cranelift;
 // This is to be able to set the tunables
-use wasmer::WasmerCompilerEngine;
+use wasmer::NativeEngineExt;
 
 /// A custom tunables that allows you to set a memory limit.
 ///

lib/api/src/engine.rs

@@ -42,22 +42,12 @@ impl Default for Engine {
     }
 }
 
-impl From<engine_imp::Engine> for Engine {
-    fn from(inner: engine_imp::Engine) -> Self {
-        Self(inner)
+impl<T: Into<engine_imp::Engine>> From<T> for Engine {
+    fn from(t: T) -> Self {
+        Self(t.into())
     }
 }
 
-// impl<P> Into<Engine> for P
-// where
-//     P: Into<engine_imp::Engine>
-// {
-//     fn into(self) -> Engine {
-//         let inner_engine: engine_imp::Engine = self.into();
-//         Engine(inner_engine)
-//     }
-// }
-
 /// A temporary handle to an [`Engine`]
 /// EngineRef can be used to build a [`Module`][wasmer::Module]
 /// It can be created directly with an [`Engine`]

lib/api/src/sys/engine.rs

@@ -51,18 +51,6 @@ pub(crate) fn default_engine() -> Engine {
     engine
 }
 
-impl From<EngineBuilder> for crate::engine::Engine {
-    fn from(builder: EngineBuilder) -> Self {
-        Self(builder.into())
-    }
-}
-
-// impl From<CompilerConfig> for crate::engine::Engine {
-//     fn from(compiler: CompilerConfig) -> Self {
-//         Self(compiler.into())
-//     }
-// }
-
 /// The custom trait to access to all the `sys` function in the common
 /// engine.
 pub trait NativeEngineExt {