From 513c12550cf9b21590a0ad517ee9b5c87dbb9d96 Mon Sep 17 00:00:00 2001
From: Jakub Jankiewicz <jcubic@onet.pl>
Date: Fri, 1 Mar 2024 21:36:16 +0100
Subject: [PATCH] add escaped symbols to scheme tutorial

---
 docs/docs/scheme-intro/data-types.md | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/docs/docs/scheme-intro/data-types.md b/docs/docs/scheme-intro/data-types.md
index fb49309d..917a8438 100644
--- a/docs/docs/scheme-intro/data-types.md
+++ b/docs/docs/scheme-intro/data-types.md
@@ -84,6 +84,24 @@ You can also convert string to symbol with:
 
 Scheme have conversion of using `->` arrow to define procedure that convert types.
 
+In R<sub>7</sub>RS spec there is also a way to define symbols with special characters. Those symbols start and end with a vertical bar character.
+
+```scheme
+(define |foo bar| 10)
+(define |foo () bar| 20)
+(display |foo bar|)
+;; ==> 10
+(display |foo () bar|)
+;; ==> 20
+```
+
+You can also put escaped characters in symbol, like in strings:
+
+```scheme
+(symbol=? '|\x3BB;| 'λ)
+;; ==> #t
+```
+
 ## Comments
 
 There are 3 types of comments in Scheme: