From dca5f7b57bb5b535930d437c806f48a25cf6b569 Mon Sep 17 00:00:00 2001
From: Lefteris Karapetsas <lefteris@refu.co>
Date: Wed, 4 Feb 2015 16:37:54 +0100
Subject: [PATCH] Adding ether subdenominations after constan literals

---
 AST.cpp    | 11 +++++++++++
 AST.h      | 16 +++++++++++++---
 Parser.cpp |  6 ++++--
 Token.h    |  5 +++++
 Types.cpp  | 27 ++++++++++++++++++++++++---
 5 files changed, 57 insertions(+), 8 deletions(-)

diff --git a/AST.cpp b/AST.cpp
index 6028c07cf..f0c60e05d 100644
--- a/AST.cpp
+++ b/AST.cpp
@@ -594,6 +594,17 @@ void ElementaryTypeNameExpression::checkTypeRequirements()
 	m_type = make_shared<TypeType>(Type::fromElementaryTypeName(m_typeToken));
 }
 
+Literal::Literal(Location const& _location, Token::Value _token,
+				 ASTPointer<ASTString> const& _value,
+				 Token::Value _sub):
+	PrimaryExpression(_location), m_token(_token), m_value(_value)
+{
+	solAssert(_sub == Token::ILLEGAL || _sub == Token::ETH_SUB_WEI ||
+			  _sub == Token::ETH_SUB_SZABO || _sub == Token::ETH_SUB_FINNEY ||
+			  _sub == Token::ETH_SUB_ETHER, "Illegal Token::Value given to Literal ctor");
+	m_subDenomination =static_cast<Literal::ethSubDenomination>(_sub);
+}
+
 void Literal::checkTypeRequirements()
 {
 	m_type = Type::forLiteral(*this);
diff --git a/AST.h b/AST.h
index 525907bf4..ecf91c059 100755
--- a/AST.h
+++ b/AST.h
@@ -1112,13 +1112,20 @@ private:
 };
 
 /**
- * A literal string or number. @see Type::literalToBigEndian is used to actually parse its value.
+ * A literal string or number. @see ExpressionCompiler::endVisit() is used to actually parse its value.
  */
 class Literal: public PrimaryExpression
 {
 public:
-	Literal(Location const& _location, Token::Value _token, ASTPointer<ASTString> const& _value):
-		PrimaryExpression(_location), m_token(_token), m_value(_value) {}
+	enum class ethSubDenomination {
+		NONE = Token::ILLEGAL,
+		WEI = Token::ETH_SUB_WEI,
+		SZABO = Token::ETH_SUB_SZABO,
+		FINNEY = Token::ETH_SUB_FINNEY,
+		ETHER = Token::ETH_SUB_ETHER};
+	Literal(Location const& _location, Token::Value _token,
+			ASTPointer<ASTString> const& _value,
+			Token::Value _sub = Token::ILLEGAL);
 	virtual void accept(ASTVisitor& _visitor) override;
 	virtual void accept(ASTConstVisitor& _visitor) const override;
 	virtual void checkTypeRequirements() override;
@@ -1127,9 +1134,12 @@ public:
 	/// @returns the non-parsed value of the literal
 	ASTString const& getValue() const { return *m_value; }
 
+	ethSubDenomination getSubDenomination() const { return m_subDenomination; }
+
 private:
 	Token::Value m_token;
 	ASTPointer<ASTString> m_value;
+	ethSubDenomination m_subDenomination;
 };
 
 /// @}
diff --git a/Parser.cpp b/Parser.cpp
index 0ad7bd7ca..739bbdd61 100644
--- a/Parser.cpp
+++ b/Parser.cpp
@@ -180,7 +180,7 @@ ASTPointer<InheritanceSpecifier> Parser::parseInheritanceSpecifier()
 
 Declaration::Visibility Parser::parseVisibilitySpecifier(Token::Value _token)
 {
-	Declaration::Visibility visibility;
+	Declaration::Visibility visibility = Declaration::Visibility::DEFAULT;
 	if (_token == Token::PUBLIC)
 		visibility = Declaration::Visibility::PUBLIC;
 	else if (_token == Token::PROTECTED)
@@ -684,6 +684,7 @@ ASTPointer<Expression> Parser::parsePrimaryExpression()
 	ASTNodeFactory nodeFactory(*this);
 	Token::Value token = m_scanner->getCurrentToken();
 	ASTPointer<Expression> expression;
+	Token::Value nextToken = Token::ILLEGAL;
 	switch (token)
 	{
 	case Token::TRUE_LITERAL:
@@ -691,9 +692,10 @@ ASTPointer<Expression> Parser::parsePrimaryExpression()
 		expression = nodeFactory.createNode<Literal>(token, getLiteralAndAdvance());
 		break;
 	case Token::NUMBER:
+		nextToken = m_scanner->peekNextToken();
 	case Token::STRING_LITERAL:
 		nodeFactory.markEndPosition();
-		expression = nodeFactory.createNode<Literal>(token, getLiteralAndAdvance());
+		expression = nodeFactory.createNode<Literal>(token, getLiteralAndAdvance(), nextToken);
 		break;
 	case Token::IDENTIFIER:
 		nodeFactory.markEndPosition();
diff --git a/Token.h b/Token.h
index 76e504499..7b9608254 100644
--- a/Token.h
+++ b/Token.h
@@ -174,6 +174,11 @@ namespace solidity
 	K(WHILE, "while", 0)                                               \
 	\
 	\
+	/* Ether subdenominations */                                       \
+	K(ETH_SUB_WEI, "wei", 0)                                           \
+	K(ETH_SUB_SZABO, "szabo", 0)                                       \
+	K(ETH_SUB_FINNEY, "finney", 0)                                     \
+	K(ETH_SUB_ETHER, "ether", 0)                                       \
 	/* type keywords, keep them in this order, keep int as first keyword
 	 * the implementation in Types.cpp has to be synced to this here
 	 *  TODO more to be added */                                       \
diff --git a/Types.cpp b/Types.cpp
index 54e701c10..98c648025 100644
--- a/Types.cpp
+++ b/Types.cpp
@@ -326,15 +326,36 @@ string IntegerConstantType::toString() const
 	return "int_const " + m_value.str();
 }
 
-u256 IntegerConstantType::literalValue(Literal const*) const
+u256 IntegerConstantType::literalValue(Literal const* _literal) const
 {
+	Literal::ethSubDenomination sub =_literal->getSubDenomination();
+	u256 value;
 	// we ignore the literal and hope that the type was correctly determined
 	solAssert(m_value <= u256(-1), "Integer constant too large.");
 	solAssert(m_value >= -(bigint(1) << 255), "Integer constant too small.");
+
+
 	if (m_value >= 0)
-		return u256(m_value);
+		value = u256(m_value);
 	else
-		return s2u(s256(m_value));
+		value = s2u(s256(m_value));
+
+	switch(sub) {
+	case Literal::ethSubDenomination::WEI:
+	case Literal::ethSubDenomination::NONE:
+		break;
+	case Literal::ethSubDenomination::SZABO:
+		value *= u256(1000000000000);
+		break;
+	case Literal::ethSubDenomination::FINNEY:
+		value *= u256(1000000000000000);
+		break;
+	case Literal::ethSubDenomination::ETHER:
+		value *= u256(1000000000000000000);
+		break;
+	}
+
+	return value;
 }
 
 shared_ptr<IntegerType const> IntegerConstantType::getIntegerType() const