From 4631e54e08184df7b6788f37b0ad2f808d1d73cc Mon Sep 17 00:00:00 2001
From: Christian <c@ethdev.com>
Date: Thu, 15 Jan 2015 16:15:01 +0100
Subject: Inheritance parser.

---
 AST.h      |  3 +++
 Parser.cpp | 13 +++++++++++--
 Token.h    |  2 +-
 3 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/AST.h b/AST.h
index 409aed44..e4761536 100755
--- a/AST.h
+++ b/AST.h
@@ -158,10 +158,12 @@ public:
 	ContractDefinition(Location const& _location,
 					   ASTPointer<ASTString> const& _name,
 					   ASTPointer<ASTString> const& _documentation,
+					   std::vector<ASTPointer<Identifier>> const& _baseContracts,
 					   std::vector<ASTPointer<StructDefinition>> const& _definedStructs,
 					   std::vector<ASTPointer<VariableDeclaration>> const& _stateVariables,
 					   std::vector<ASTPointer<FunctionDefinition>> const& _definedFunctions):
 		Declaration(_location, _name),
+		m_baseContracts(_baseContracts),
 		m_definedStructs(_definedStructs),
 		m_stateVariables(_stateVariables),
 		m_definedFunctions(_definedFunctions),
@@ -193,6 +195,7 @@ public:
 private:
 	std::vector<std::pair<FixedHash<4>, FunctionDefinition const*>> getInterfaceFunctionList() const;
 
+	std::vector<ASTPointer<Identifier>> m_baseContracts;
 	std::vector<ASTPointer<StructDefinition>> m_definedStructs;
 	std::vector<ASTPointer<VariableDeclaration>> m_stateVariables;
 	std::vector<ASTPointer<FunctionDefinition>> m_definedFunctions;
diff --git a/Parser.cpp b/Parser.cpp
index ebff3ba4..26fc2018 100644
--- a/Parser.cpp
+++ b/Parser.cpp
@@ -117,10 +117,18 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 		docstring = make_shared<ASTString>(m_scanner->getCurrentCommentLiteral());
 	expectToken(Token::CONTRACT);
 	ASTPointer<ASTString> name = expectIdentifierToken();
-	expectToken(Token::LBRACE);
+	vector<ASTPointer<Identifier>> baseContracts;
 	vector<ASTPointer<StructDefinition>> structs;
 	vector<ASTPointer<VariableDeclaration>> stateVariables;
 	vector<ASTPointer<FunctionDefinition>> functions;
+	if (m_scanner->getCurrentToken() == Token::IS)
+		do
+		{
+			m_scanner->next();
+			baseContracts.push_back(ASTNodeFactory(*this).createNode<Identifier>(expectIdentifierToken()));
+		}
+		while (m_scanner->getCurrentToken() == Token::COMMA);
+	expectToken(Token::LBRACE);
 	bool visibilityIsPublic = true;
 	while (true)
 	{
@@ -149,7 +157,8 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition()
 	}
 	nodeFactory.markEndPosition();
 	expectToken(Token::RBRACE);
-	return nodeFactory.createNode<ContractDefinition>(name, docstring, structs, stateVariables, functions);
+	return nodeFactory.createNode<ContractDefinition>(name, docstring, baseContracts, structs,
+													  stateVariables, functions);
 }
 
 ASTPointer<FunctionDefinition> Parser::parseFunctionDefinition(bool _isPublic)
diff --git a/Token.h b/Token.h
index 9fb86e7f..552e9a75 100644
--- a/Token.h
+++ b/Token.h
@@ -153,7 +153,7 @@ namespace solidity
 	K(DEFAULT, "default", 0)                                           \
 	K(DO, "do", 0)                                                     \
 	K(ELSE, "else", 0)                                                 \
-	K(EXTENDS, "extends", 0)                                           \
+	K(IS, "is", 0)                                                     \
 	K(FOR, "for", 0)                                                   \
 	K(FUNCTION, "function", 0)                                         \
 	K(IF, "if", 0)                                                     \
-- 
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