From ac6871078940f0ae4a47380091fc46ed46a63d0a Mon Sep 17 00:00:00 2001
From: Leonardo Alt <leo@ethereum.org>
Date: Tue, 22 May 2018 17:37:21 +0200
Subject: Disallow trailing dots that are not followed by a number

---
 libsolidity/parsing/Scanner.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'libsolidity')

diff --git a/libsolidity/parsing/Scanner.cpp b/libsolidity/parsing/Scanner.cpp
index 6541f6c2..801d2cc4 100644
--- a/libsolidity/parsing/Scanner.cpp
+++ b/libsolidity/parsing/Scanner.cpp
@@ -768,8 +768,14 @@ Token::Value Scanner::scanNumber(char _charSeen)
 			scanDecimalDigits();  // optional
 			if (m_char == '.')
 			{
+				// A '.' has to be followed by a number.
+				if (m_source.isPastEndOfInput() || !isDecimalDigit(m_source.get(1)))
+				{
+					literal.complete();
+					return Token::Number;
+				}
 				addLiteralCharAndAdvance();
-				scanDecimalDigits();  // optional
+				scanDecimalDigits();
 			}
 		}
 	}
-- 
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