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Function type state variables.

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This commit is contained in:
chriseth
2016-11-16 14:37:17 +01:00
parent dd173f83e3
commit 97a3588701
4 changed files with 115 additions and 33 deletions
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libsolidity/parsing/Parser.cpp
+66 -31
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@@ -217,7 +217,9 @@ ASTPointer<ContractDefinition> Parser::parseContractDefinition(bool _isLibrary)
if (currentTokenValue == Token::RBrace)
break;
else if (currentTokenValue == Token::Function)
subNodes.push_back(parseFunctionDefinition(name.get()));
// This can be a function or a state variable of function type (especially
// complicated to distinguish fallback function from function type state variable)
subNodes.push_back(parseFunctionDefinitionOrFunctionTypeStateVariable(name.get()));
else if (currentTokenValue == Token::Struct)
subNodes.push_back(parseStructDefinition());
else if (currentTokenValue == Token::Enum)
@@ -334,7 +336,7 @@ Parser::FunctionHeaderParserResult Parser::parseFunctionHeader(bool _forceEmptyN
return result;
}
ASTPointer<FunctionDefinition> Parser::parseFunctionDefinition(ASTString const* _contractName)
ASTPointer<ASTNode> Parser::parseFunctionDefinitionOrFunctionTypeStateVariable(ASTString const* _contractName)
{
ASTNodeFactory nodeFactory(*this);
ASTPointer<ASTString> docstring;
@@ -343,28 +345,55 @@ ASTPointer<FunctionDefinition> Parser::parseFunctionDefinition(ASTString const*
FunctionHeaderParserResult header = parseFunctionHeader(false, true);
ASTPointer<Block> block = ASTPointer<Block>();
nodeFactory.markEndPosition();
if (m_scanner->currentToken() != Token::Semicolon)
if (
!header.modifiers.empty() ||
!header.name->empty() ||
m_scanner->currentToken() == Token::Semicolon ||
m_scanner->currentToken() == Token::LBrace
)
{
block = parseBlock();
nodeFactory.setEndPositionFromNode(block);
// this has to be a function
ASTPointer<Block> block = ASTPointer<Block>();
nodeFactory.markEndPosition();
if (m_scanner->currentToken() != Token::Semicolon)
{
block = parseBlock();
nodeFactory.setEndPositionFromNode(block);
}
else
m_scanner->next(); // just consume the ';'
bool const c_isConstructor = (_contractName && *header.name == *_contractName);
return nodeFactory.createNode<FunctionDefinition>(
header.name,
header.visibility,
c_isConstructor,
docstring,
header.parameters,
header.isDeclaredConst,
header.modifiers,
header.returnParameters,
header.isPayable,
block
);
}
else
m_scanner->next(); // just consume the ';'
bool const c_isConstructor = (_contractName && *header.name == *_contractName);
return nodeFactory.createNode<FunctionDefinition>(
header.name,
header.visibility,
c_isConstructor,
docstring,
header.parameters,
header.isDeclaredConst,
header.modifiers,
header.returnParameters,
header.isPayable,
block
);
{
// this has to be a state variable
ASTPointer<TypeName> type = nodeFactory.createNode<FunctionTypeName>(
header.parameters,
header.returnParameters,
header.visibility,
header.isDeclaredConst,
header.isPayable
);
type = parseTypeNameSuffix(type, nodeFactory);
VarDeclParserOptions options;
options.isStateVariable = true;
options.allowInitialValue = true;
auto node = parseVariableDeclaration(options, type);
expectToken(Token::Semicolon);
return node;
}
}
ASTPointer<StructDefinition> Parser::parseStructDefinition()
@@ -613,6 +642,21 @@ ASTPointer<UserDefinedTypeName> Parser::parseUserDefinedTypeName()
return nodeFactory.createNode<UserDefinedTypeName>(identifierPath);
}
ASTPointer<TypeName> Parser::parseTypeNameSuffix(ASTPointer<TypeName> type, ASTNodeFactory& nodeFactory)
{
while (m_scanner->currentToken() == Token::LBrack)
{
m_scanner->next();
ASTPointer<Expression> length;
if (m_scanner->currentToken() != Token::RBrack)
length = parseExpression();
nodeFactory.markEndPosition();
expectToken(Token::RBrack);
type = nodeFactory.createNode<ArrayTypeName>(type, length);
}
return type;
}
ASTPointer<TypeName> Parser::parseTypeName(bool _allowVar)
{
ASTNodeFactory nodeFactory(*this);
@@ -644,16 +688,7 @@ ASTPointer<TypeName> Parser::parseTypeName(bool _allowVar)
if (type)
// Parse "[...]" postfixes for arrays.
while (m_scanner->currentToken() == Token::LBrack)
{
m_scanner->next();
ASTPointer<Expression> length;
if (m_scanner->currentToken() != Token::RBrack)
length = parseExpression();
nodeFactory.markEndPosition();
expectToken(Token::RBrack);
type = nodeFactory.createNode<ArrayTypeName>(type, length);
}
type = parseTypeNameSuffix(type, nodeFactory);
return type;
}