Make public API consistent

lib/api/src/lib.rs

@@ -446,11 +446,36 @@ mod value;
 pub mod vm;
 
 #[cfg(feature = "sys")]
-mod sys;
+/// sys
+pub mod sys;
 
 #[cfg(feature = "sys")]
 pub use sys::*;
 
+#[cfg(feature = "sys")]
+#[deprecated(note = "Use sys::Artifact instead")]
+/// A compiled wasm module, ready to be instantiated.
+pub type Artifact = sys::Artifact;
+#[cfg(feature = "sys")]
+#[deprecated(note = "Use sys::EngineBuilder instead")]
+/// The Builder contents of `Engine`
+pub type EngineBuilder = sys::EngineBuilder;
+#[cfg(feature = "sys")]
+#[deprecated(note = "Use sys::Features instead")]
+/// Controls which experimental features will be enabled.
+pub type Features = sys::Features;
+#[cfg(feature = "sys")]
+#[deprecated(note = "Use sys::BaseTunables instead")]
+/// Tunable parameters for WebAssembly compilation.
+/// This is the reference implementation of the `Tunables` trait,
+/// used by default.
+pub type BaseTunables = sys::BaseTunables;
+#[cfg(feature = "sys")]
+#[deprecated(note = "Use sys::VMConfig instead")]
+/// Configuration for the the runtime VM
+/// Currently only the stack size is configurable
+pub type VMConfig = sys::VMConfig;
+
 #[cfg(feature = "js")]
 mod js;
 

lib/api/src/sys/mod.rs

@@ -5,7 +5,7 @@ pub(crate) mod externals;
 pub(crate) mod instance;
 pub(crate) mod mem_access;
 pub(crate) mod module;
-mod tunables;
+pub(super) mod tunables;
 pub(crate) mod typed_function;
 
 pub use crate::sys::engine::NativeEngineExt;