From b5612f96c97dd6fc77fda7179f85d31a38a8cd1e Mon Sep 17 00:00:00 2001
From: Harikrishnan Mulackal <webmail.hari@gmail.com>
Date: Tue, 5 May 2020 14:26:18 +0530
Subject: [PATCH] Deprecated identifier now

---
 libsolidity/analysis/TypeChecker.cpp | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/libsolidity/analysis/TypeChecker.cpp b/libsolidity/analysis/TypeChecker.cpp
index e626dac2c..ecafd1dae 100644
--- a/libsolidity/analysis/TypeChecker.cpp
+++ b/libsolidity/analysis/TypeChecker.cpp
@@ -2908,6 +2908,20 @@ bool TypeChecker::visit(Identifier const& _identifier)
 			);
 	}
 
+	if (
+		MagicVariableDeclaration const* magicVar =
+		dynamic_cast<MagicVariableDeclaration const*>(annotation.referencedDeclaration)
+	)
+		if (magicVar->type()->category() == Type::Category::Integer)
+		{
+			solAssert(_identifier.name() == "now", "");
+			m_errorReporter
+				.typeError(
+					_identifier.location(),
+					"\"now\" has been deprecated. Use \"block.timestamp\" instead."
+				);
+		}
+
 	return false;
 }