From 98e343b3fc11f3e94297b016c3f625e3b319b09b Mon Sep 17 00:00:00 2001
From: chriseth <c@ethdev.com>
Date: Wed, 1 Feb 2017 21:40:50 +0100
Subject: Parsing of labels with stack info.

---
 libsolidity/inlineasm/AsmParser.cpp | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'libsolidity/inlineasm/AsmParser.cpp')

diff --git a/libsolidity/inlineasm/AsmParser.cpp b/libsolidity/inlineasm/AsmParser.cpp
index 0fc0a34f..5d439b2f 100644
--- a/libsolidity/inlineasm/AsmParser.cpp
+++ b/libsolidity/inlineasm/AsmParser.cpp
@@ -121,6 +121,38 @@ assembly::Statement Parser::parseStatement()
 			return label;
 		}
 	}
+	case Token::LBrack:
+	{
+		if (statement.type() != typeid(assembly::Identifier))
+			fatalParserError("Label name must precede \"[\".");
+		assembly::Identifier const& identifier = boost::get<assembly::Identifier>(statement);
+		Label label = createWithLocation<Label>(identifier.location);
+		label.name = identifier.name;
+		m_scanner->next();
+		if (m_scanner->currentToken() == Token::Number)
+		{
+			label.stackInfo.push_back(m_scanner->currentLiteral());
+			m_scanner->next();
+		}
+		else if (m_scanner->currentToken() == Token::Sub)
+		{
+			m_scanner->next();
+			label.stackInfo.push_back("-" + m_scanner->currentLiteral());
+			expectToken(Token::Number);
+		}
+		else
+			while (true)
+			{
+				label.stackInfo.push_back(expectAsmIdentifier());
+				if (m_scanner->currentToken() == Token::RBrack)
+					break;
+				expectToken(Token::Comma);
+			}
+		expectToken(Token::RBrack);
+		label.location.end = endPosition();
+		expectToken(Token::Colon);
+		return label;
+	}
 	default:
 		break;
 	}
-- 
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