-| ASTFE_EXPR_B8toW16 : astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_BYTE8) → astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_WORD16)
-| ASTFE_EXPR_B8toW32 : astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_BYTE8) → astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_WORD32)
-| ASTFE_EXPR_W16toB8 : astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_WORD16) → astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
-| ASTFE_EXPR_W16toW32: astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_WORD16) → astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_WORD32)
-| ASTFE_EXPR_W32toB8 : astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_WORD32) → astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
-| ASTFE_EXPR_W32toW16: astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_WORD32) → astfe_expr (AST_TYPE_BASE AST_BASE_TYPE_WORD16)
+| ASTFE_EXPR_B8toW16 : astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8) → astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_WORD16)
+| ASTFE_EXPR_B8toW32 : astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8) → astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_WORD32)
+| ASTFE_EXPR_W16toB8 : astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_WORD16) → astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
+| ASTFE_EXPR_W16toW32: astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_WORD16) → astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_WORD32)
+| ASTFE_EXPR_W32toB8 : astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_WORD32) → astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_BYTE8)
+| ASTFE_EXPR_W32toW16: astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_WORD32) → astfe_expr e (AST_TYPE_BASE AST_BASE_TYPE_WORD16)