AerScript does not implement any error control operator.

engine/parser.c

@@ -174,7 +174,6 @@ static const ph7_expr_op aOpTable[] = {
 	{ {"+", sizeof(char)},                 EXPR_OP_UPLUS,     4, EXPR_OP_ASSOC_RIGHT, PH7_OP_UPLUS },
 	{ {"~", sizeof(char)},                 EXPR_OP_BITNOT,    4, EXPR_OP_ASSOC_RIGHT, PH7_OP_BITNOT },
 	{ {"!", sizeof(char)},                 EXPR_OP_LOGNOT,    4, EXPR_OP_ASSOC_RIGHT, PH7_OP_LNOT },
-	{ {"@", sizeof(char)},                 EXPR_OP_ALT,       4, EXPR_OP_ASSOC_RIGHT, PH7_OP_ERR_CTRL},
 	/* Cast operators */
 	{ {"(int)",      sizeof("(int)") - 1   }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_INT  },
 	{ {"(bool)",     sizeof("(bool)") - 1  }, EXPR_OP_TYPECAST, 4, EXPR_OP_ASSOC_RIGHT, PH7_OP_CVT_BOOL },

engine/vm.c

@@ -2316,18 +2316,6 @@ static sxi32 VmByteCodeExec(
 #endif
 				PH7_MemObjToVoid(pTos);
 				break;
-			/*
-			 * ERR_CTRL * * *
-			 *
-			 * Error control operator.
-			 */
-			case PH7_OP_ERR_CTRL:
-				/*
-				 * TICKET 1433-038:
-				 * As of this version ,the error control operator '@' is a no-op,simply
-				 * use the public API,to control error output.
-				 */
-				break;
 			/*
 			 * IS_A * * *
 			 *
@@ -5720,9 +5708,6 @@ static const char *VmInstrToString(sxi32 nOp) {
 		case PH7_OP_MEMBER:
 			zOp = "MEMBER";
 			break;
-		case PH7_OP_ERR_CTRL:
-			zOp = "ERR_CTRL";
-			break;
 		case PH7_OP_IS_A:
 			zOp = "IS_A";
 			break;

include/ph7int.h

@@ -1469,7 +1469,6 @@ enum ph7_vm_op {
 	PH7_OP_POP_EXCEPTION, /* POP an exception */
 	PH7_OP_THROW,         /* Throw exception */
 	PH7_OP_SWITCH,        /* Switch operation */
-	PH7_OP_ERR_CTRL      /* Error control */
 };
 /* -- END-OF INSTRUCTIONS -- */
 /*