Add set_catch, unset_catch instructions

valuescript_vm/src/bytecode_stack_frame.rs

@@ -20,6 +20,12 @@ pub struct BytecodeStackFrame {
   pub param_end: usize,
   pub this_target: Option<usize>,
   pub return_target: Option<usize>,
+  pub catch_setting: Option<CatchSetting>,
+}
+
+pub struct CatchSetting {
+  pub pos: usize,
+  pub register: Option<usize>,
 }
 
 impl BytecodeStackFrame {
@@ -404,6 +410,17 @@ impl StackFrameTrait for BytecodeStackFrame {
       Import | ImportStar => {
         panic!("TODO: Dynamic imports")
       }
+
+      SetCatch => {
+        self.catch_setting = Some(CatchSetting {
+          pos: self.decoder.decode_pos(),
+          register: self.decoder.decode_register_index(),
+        });
+      }
+
+      UnsetCatch => {
+        self.catch_setting = None;
+      }
     };
 
     Ok(FrameStepOk::Continue)

valuescript_vm/src/vs_function.rs

@@ -50,11 +50,12 @@ impl VsFunction {
         data: self.bytecode.clone(),
         pos: self.start,
       },
-      registers: registers,
+      registers,
       param_start: self.binds.len() + 2,
       param_end: self.parameter_count + 2,
       this_target: None,
       return_target: None,
+      catch_setting: None,
     });
   }
 }