feat(jit): with

src/eval/jit/compile.rs

@@ -463,7 +463,12 @@ impl JITCompile for Let {
 
 impl JITCompile for With {
     fn compile(&self, ctx: &mut JITContext, engine: ir::Value, env: ir::Value) -> StackSlot {
-        todo!()
+        let namespace = self.namespace.compile(ctx, engine, env);
+        ctx.enter_with(env, namespace);
+        let ret = self.expr.compile(ctx, engine, env);
+        ctx.exit_with(env);
+        ctx.free_slot(namespace);
+        ret
     }
 }
 
@@ -519,7 +524,7 @@ impl JITCompile for Str {
 
 impl JITCompile for Var {
     fn compile(&self, ctx: &mut JITContext, engine: ir::Value, env: ir::Value) -> StackSlot {
-        todo!()
+        ctx.lookup(env, &self.sym)
     }
 }