From 9c82cbeddf1b03cc99660a867de8720d1d174b9c Mon Sep 17 00:00:00 2001
From: chriseth <c@ethdev.com>
Date: Mon, 9 Mar 2015 19:22:43 +0100
Subject: [PATCH] Global variable "now" (alias for block.timestamp).

---
 ExpressionCompiler.cpp | 12 +++++++++++-
 GlobalContext.cpp      |  1 +
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/ExpressionCompiler.cpp b/ExpressionCompiler.cpp
index b02aecf5f..d2457e676 100644
--- a/ExpressionCompiler.cpp
+++ b/ExpressionCompiler.cpp
@@ -825,10 +825,20 @@ void ExpressionCompiler::endVisit(Identifier const& _identifier)
 	Declaration const* declaration = _identifier.getReferencedDeclaration();
 	if (MagicVariableDeclaration const* magicVar = dynamic_cast<MagicVariableDeclaration const*>(declaration))
 	{
-		if (magicVar->getType()->getCategory() == Type::Category::Contract)
+		switch (magicVar->getType()->getCategory())
+		{
+		case Type::Category::Contract:
 			// "this" or "super"
 			if (!dynamic_cast<ContractType const&>(*magicVar->getType()).isSuper())
 				m_context << eth::Instruction::ADDRESS;
+			break;
+		case Type::Category::Integer:
+			// "now"
+			m_context << eth::Instruction::TIMESTAMP;
+			break;
+		default:
+			break;
+		}
 	}
 	else if (FunctionDefinition const* functionDef = dynamic_cast<FunctionDefinition const*>(declaration))
 		m_context << m_context.getVirtualFunctionEntryLabel(*functionDef).pushTag();
diff --git a/GlobalContext.cpp b/GlobalContext.cpp
index 60de5105f..411e99abb 100644
--- a/GlobalContext.cpp
+++ b/GlobalContext.cpp
@@ -37,6 +37,7 @@ GlobalContext::GlobalContext():
 m_magicVariables(vector<shared_ptr<MagicVariableDeclaration const>>{make_shared<MagicVariableDeclaration>("block", make_shared<MagicType>(MagicType::Kind::Block)),
 					make_shared<MagicVariableDeclaration>("msg", make_shared<MagicType>(MagicType::Kind::Message)),
 					make_shared<MagicVariableDeclaration>("tx", make_shared<MagicType>(MagicType::Kind::Transaction)),
+					make_shared<MagicVariableDeclaration>("now", make_shared<IntegerType>(256)),
 					make_shared<MagicVariableDeclaration>("suicide",
 							make_shared<FunctionType>(strings{"address"}, strings{}, FunctionType::Location::Suicide)),
 					make_shared<MagicVariableDeclaration>("sha3",