From c60808d7fde051c7d9579d5781c652584c840358 Mon Sep 17 00:00:00 2001
From: Andrey Fidrya <af@zabiyaka.com>
Date: Wed, 11 Aug 2021 19:10:48 +0300
Subject: [PATCH] Fix scanUpToString returning nil on Linux

Behavior of scanUpToString differs from scanUpToString(into:).
The former returns nil when argument is "", the latter returns rest of the string.
---
 Sources/TelegramBotSDK/Extensions/Scanner+Compatibility.swift | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Sources/TelegramBotSDK/Extensions/Scanner+Compatibility.swift b/Sources/TelegramBotSDK/Extensions/Scanner+Compatibility.swift
index 2b80033..a26da39 100644
--- a/Sources/TelegramBotSDK/Extensions/Scanner+Compatibility.swift
+++ b/Sources/TelegramBotSDK/Extensions/Scanner+Compatibility.swift
@@ -81,6 +81,9 @@ extension Scanner {
 
     #if os(Linux) || os(Windows)
     func scanUpTo(_ string: String) -> String? {
+        if string.isEmpty {
+            return scanUpToCharacters(from: CharacterSet())
+        }
         return scanUpToString(string)
     }
     #elseif os(OSX)