Implement some minor UX improvements (#1031)

* impl Default for Store<T> where T: Default

* enable tail_call and extended_const for Config::default

* remove no longer needed code

* implement WasmTy for f32 and f64

crates/cli/src/context.rs

@@ -30,8 +30,6 @@ impl Context {
         compilation_mode: CompilationMode,
     ) -> Result<Self, Error> {
         let mut config = Config::default();
-        config.wasm_tail_call(true);
-        config.wasm_extended_const(true);
         if fuel.is_some() {
             config.consume_fuel(true);
         }

crates/wasmi/src/engine/config.rs

@@ -176,8 +176,8 @@ impl Default for Config {
             multi_value: true,
             bulk_memory: true,
             reference_types: true,
-            tail_call: false,
-            extended_const: false,
+            tail_call: true,
+            extended_const: true,
             floats: true,
             consume_fuel: false,
             fuel_costs: FuelCosts::default(),

crates/wasmi/src/func/into_func.rs

@@ -180,6 +180,8 @@ impl_wasm_type! {
     type i64 = I64;
     type F32 = F32;
     type F64 = F64;
+    type f32 = F32;
+    type f64 = F64;
     type FuncRef = FuncRef;
     type ExternRef = ExternRef;
 }

crates/wasmi/src/store.rs

@@ -822,6 +822,21 @@ impl StoreInner {
     }
 }
 
+impl<T> Default for Store<T>
+where
+    T: Default,
+{
+    fn default() -> Self {
+        let engine = Engine::default();
+        Self {
+            inner: StoreInner::new(&engine),
+            trampolines: Arena::new(),
+            data: T::default(),
+            limiter: None,
+        }
+    }
+}
+
 impl<T> Store<T> {
     /// Creates a new store.
     pub fn new(engine: &Engine, data: T) -> Self {