From 5f3807b2c181758c4daa631e9463768b1ab85c8d Mon Sep 17 00:00:00 2001
From: yhirose <yuji.hirose.bug@gmail.com>
Date: Fri, 8 Jul 2022 20:35:05 -0400
Subject: [PATCH] Updated README

---
 README.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/README.md b/README.md
index 88c273d..ff021a8 100644
--- a/README.md
+++ b/README.md
@@ -34,6 +34,9 @@ The PEG syntax is well described on page 2 in the [document](http://www.brynosau
   * `exp⇑label` or `exp^label` (Syntax sugar for `(exp / %recover(label))`)
   * `label { message "..." }` (Error message instruction)
   * `{ no_ast_opt }` (No AST node optimazation instruction)
+
+The following syntax is available with `CPPPEGLIB_SYMBOL_TABLE_SUPPORT`.
+
   * `{ declare_symbol "..." }` (Declare symbol instruction)
   * `{ check_symbol "..." }` (Check symbol instruction)
 
@@ -462,6 +465,8 @@ See actual usages in the [AST calculator example](https://github.com/yhirose/cpp
 Symbol Table
 ------------
 
+NOTE: This feature is available with `CPPPEGLIB_SYMBOL_TABLE_SUPPORT`.
+
 Simple symbol table support is available with `declare_symbol` and `check_symbol` instructions.
 
 ```peg