From e901324ab04acf1b03481df2ac3f2ea98f392f52 Mon Sep 17 00:00:00 2001
From: Arthur Maciel <arthurmaciel@gmail.com>
Date: Fri, 22 Jan 2021 22:44:40 -0300
Subject: [PATCH] Added advices on foreign docs

---
 docs/api/cyclone/foreign.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/docs/api/cyclone/foreign.md b/docs/api/cyclone/foreign.md
index 4a856531..ac188886 100644
--- a/docs/api/cyclone/foreign.md
+++ b/docs/api/cyclone/foreign.md
@@ -71,3 +71,6 @@ Scheme | C
 `opaque` | `void *`
 `c-void` | `void`
 
+Useful notes:
+- Use `opaque` if you need to handle any kind of C pointer.
+- Use `string` to handle C `const char*` (`symbol` is strictly used to represent Scheme symbols).