/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see .
*/
/**
* @author Christian
* @date 2014
* Solidity parser.
*/
#include
#include
#include
#include
#include
#include
using namespace std;
namespace dev
{
namespace solidity
{
/// AST node factory that also tracks the begin and end position of an AST node
/// while it is being parsed
class Parser::ASTNodeFactory
{
public:
ASTNodeFactory(Parser const& _parser):
m_parser(_parser), m_location(_parser.getPosition(), -1, _parser.getSourceName()) {}
void markEndPosition() { m_location.end = m_parser.getEndPosition(); }
void setLocationEmpty() { m_location.end = m_location.start; }
/// Set the end position to the one of the given node.
void setEndPositionFromNode(ASTPointer const& _node) { m_location.end = _node->getLocation().end; }
template
ASTPointer createNode(Args&& ... _args)
{
if (m_location.end < 0)
markEndPosition();
return make_shared(m_location, forward(_args)...);
}
private:
Parser const& m_parser;
Location m_location;
};
ASTPointer Parser::parse(shared_ptr const& _scanner)
{
m_scanner = _scanner;
ASTNodeFactory nodeFactory(*this);
vector> nodes;
while (_scanner->getCurrentToken() != Token::EOS)
{
switch (m_scanner->getCurrentToken())
{
case Token::IMPORT:
nodes.push_back(parseImportDirective());
break;
case Token::CONTRACT:
nodes.push_back(parseContractDefinition());
break;
default:
BOOST_THROW_EXCEPTION(createParserError(std::string("Expected import directive or contract definition.")));
}
}
return nodeFactory.createNode(nodes);
}
std::shared_ptr const& Parser::getSourceName() const
{
return m_scanner->getSourceName();
}
int Parser::getPosition() const
{
return m_scanner->getCurrentLocation().start;
}
int Parser::getEndPosition() const
{
return m_scanner->getCurrentLocation().end;
}
ASTPointer Parser::parseImportDirective()
{
ASTNodeFactory nodeFactory(*this);
expectToken(Token::IMPORT);
if (m_scanner->getCurrentToken() != Token::STRING_LITERAL)
BOOST_THROW_EXCEPTION(createParserError("Expected string literal (URL)."));
ASTPointer url = getLiteralAndAdvance();
nodeFactory.markEndPosition();
expectToken(Token::SEMICOLON);
return nodeFactory.createNode(url);
}
ASTPointer Parser::parseContractDefinition()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer docString;
if (m_scanner->getCurrentCommentLiteral() != "")
docString = make_shared(m_scanner->getCurrentCommentLiteral());
expectToken(Token::CONTRACT);
ASTPointer name = expectIdentifierToken();
vector> baseContracts;
vector> structs;
vector> stateVariables;
vector> functions;
vector> modifiers;
vector> events;
if (m_scanner->getCurrentToken() == Token::IS)
do
{
m_scanner->next();
baseContracts.push_back(parseInheritanceSpecifier());
}
while (m_scanner->getCurrentToken() == Token::COMMA);
expectToken(Token::LBRACE);
while (true)
{
Token::Value currentToken = m_scanner->getCurrentToken();
if (currentToken == Token::RBRACE)
break;
else if (currentToken == Token::FUNCTION)
functions.push_back(parseFunctionDefinition(name.get()));
else if (currentToken == Token::STRUCT)
structs.push_back(parseStructDefinition());
else if (currentToken == Token::IDENTIFIER || currentToken == Token::MAPPING ||
Token::isElementaryTypeName(currentToken))
{
VarDeclParserOptions options;
options.isStateVariable = true;
stateVariables.push_back(parseVariableDeclaration(options));
expectToken(Token::SEMICOLON);
}
else if (currentToken == Token::MODIFIER)
modifiers.push_back(parseModifierDefinition());
else if (currentToken == Token::EVENT)
events.push_back(parseEventDefinition());
else
BOOST_THROW_EXCEPTION(createParserError("Function, variable, struct or modifier declaration expected."));
}
nodeFactory.markEndPosition();
expectToken(Token::RBRACE);
return nodeFactory.createNode(name, docString, baseContracts, structs,
stateVariables, functions, modifiers, events);
}
ASTPointer Parser::parseInheritanceSpecifier()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer name(parseIdentifier());
vector> arguments;
if (m_scanner->getCurrentToken() == Token::LPAREN)
{
m_scanner->next();
arguments = parseFunctionCallListArguments();
nodeFactory.markEndPosition();
expectToken(Token::RPAREN);
}
else
nodeFactory.setEndPositionFromNode(name);
return nodeFactory.createNode(name, arguments);
}
Declaration::Visibility Parser::parseVisibilitySpecifier(Token::Value _token)
{
Declaration::Visibility visibility = Declaration::Visibility::DEFAULT;
if (_token == Token::PUBLIC)
visibility = Declaration::Visibility::PUBLIC;
else if (_token == Token::PROTECTED)
visibility = Declaration::Visibility::PROTECTED;
else if (_token == Token::PRIVATE)
visibility = Declaration::Visibility::PRIVATE;
else
solAssert(false, "Invalid visibility specifier.");
m_scanner->next();
return visibility;
}
ASTPointer Parser::parseFunctionDefinition(ASTString const* _contractName)
{
ASTNodeFactory nodeFactory(*this);
ASTPointer docstring;
if (m_scanner->getCurrentCommentLiteral() != "")
docstring = make_shared(m_scanner->getCurrentCommentLiteral());
expectToken(Token::FUNCTION);
ASTPointer name;
if (m_scanner->getCurrentToken() == Token::LPAREN)
name = make_shared(); // anonymous function
else
name = expectIdentifierToken();
ASTPointer parameters(parseParameterList());
bool isDeclaredConst = false;
Declaration::Visibility visibility(Declaration::Visibility::DEFAULT);
vector> modifiers;
while (true)
{
Token::Value token = m_scanner->getCurrentToken();
if (token == Token::CONST)
{
isDeclaredConst = true;
m_scanner->next();
}
else if (token == Token::IDENTIFIER)
modifiers.push_back(parseModifierInvocation());
else if (Token::isVisibilitySpecifier(token))
{
if (visibility != Declaration::Visibility::DEFAULT)
BOOST_THROW_EXCEPTION(createParserError("Multiple visibility specifiers."));
visibility = parseVisibilitySpecifier(token);
}
else
break;
}
ASTPointer returnParameters;
if (m_scanner->getCurrentToken() == Token::RETURNS)
{
bool const permitEmptyParameterList = false;
m_scanner->next();
returnParameters = parseParameterList(permitEmptyParameterList);
}
else
returnParameters = createEmptyParameterList();
ASTPointer block = parseBlock();
nodeFactory.setEndPositionFromNode(block);
bool const c_isConstructor = (_contractName && *name == *_contractName);
return nodeFactory.createNode(name, visibility, c_isConstructor, docstring,
parameters, isDeclaredConst, modifiers,
returnParameters, block);
}
ASTPointer Parser::parseStructDefinition()
{
ASTNodeFactory nodeFactory(*this);
expectToken(Token::STRUCT);
ASTPointer name = expectIdentifierToken();
vector> members;
expectToken(Token::LBRACE);
while (m_scanner->getCurrentToken() != Token::RBRACE)
{
members.push_back(parseVariableDeclaration());
expectToken(Token::SEMICOLON);
}
nodeFactory.markEndPosition();
expectToken(Token::RBRACE);
return nodeFactory.createNode(name, members);
}
ASTPointer Parser::parseVariableDeclaration(VarDeclParserOptions const& _options)
{
ASTNodeFactory nodeFactory(*this);
ASTPointer type = parseTypeName(_options.allowVar);
bool isIndexed = false;
Token::Value token = m_scanner->getCurrentToken();
if (_options.allowIndexed && token == Token::INDEXED)
{
isIndexed = true;
m_scanner->next();
}
Declaration::Visibility visibility(Declaration::Visibility::DEFAULT);
if (_options.isStateVariable && Token::isVisibilitySpecifier(token))
visibility = parseVisibilitySpecifier(token);
nodeFactory.markEndPosition();
return nodeFactory.createNode(type, expectIdentifierToken(),
visibility, _options.isStateVariable,
isIndexed);
}
ASTPointer Parser::parseModifierDefinition()
{
ScopeGuard resetModifierFlag([this]() { m_insideModifier = false; });
m_insideModifier = true;
ASTNodeFactory nodeFactory(*this);
ASTPointer docstring;
if (m_scanner->getCurrentCommentLiteral() != "")
docstring = make_shared(m_scanner->getCurrentCommentLiteral());
expectToken(Token::MODIFIER);
ASTPointer name(expectIdentifierToken());
ASTPointer parameters;
if (m_scanner->getCurrentToken() == Token::LPAREN)
parameters = parseParameterList();
else
parameters = createEmptyParameterList();
ASTPointer block = parseBlock();
nodeFactory.setEndPositionFromNode(block);
return nodeFactory.createNode(name, docstring, parameters, block);
}
ASTPointer Parser::parseEventDefinition()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer docstring;
if (m_scanner->getCurrentCommentLiteral() != "")
docstring = make_shared(m_scanner->getCurrentCommentLiteral());
expectToken(Token::EVENT);
ASTPointer name(expectIdentifierToken());
ASTPointer parameters;
if (m_scanner->getCurrentToken() == Token::LPAREN)
parameters = parseParameterList(true, true);
else
parameters = createEmptyParameterList();
nodeFactory.markEndPosition();
expectToken(Token::SEMICOLON);
return nodeFactory.createNode(name, docstring, parameters);
}
ASTPointer Parser::parseModifierInvocation()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer name(parseIdentifier());
vector> arguments;
if (m_scanner->getCurrentToken() == Token::LPAREN)
{
m_scanner->next();
arguments = parseFunctionCallListArguments();
nodeFactory.markEndPosition();
expectToken(Token::RPAREN);
}
else
nodeFactory.setEndPositionFromNode(name);
return nodeFactory.createNode(name, arguments);
}
ASTPointer Parser::parseIdentifier()
{
ASTNodeFactory nodeFactory(*this);
nodeFactory.markEndPosition();
return nodeFactory.createNode(expectIdentifierToken());
}
ASTPointer Parser::parseTypeName(bool _allowVar)
{
ASTPointer type;
Token::Value token = m_scanner->getCurrentToken();
if (Token::isElementaryTypeName(token))
{
type = ASTNodeFactory(*this).createNode(token);
m_scanner->next();
}
else if (token == Token::VAR)
{
if (!_allowVar)
BOOST_THROW_EXCEPTION(createParserError("Expected explicit type name."));
m_scanner->next();
}
else if (token == Token::MAPPING)
{
type = parseMapping();
}
else if (token == Token::IDENTIFIER)
{
ASTNodeFactory nodeFactory(*this);
nodeFactory.markEndPosition();
type = nodeFactory.createNode(expectIdentifierToken());
}
else
BOOST_THROW_EXCEPTION(createParserError("Expected type name"));
return type;
}
ASTPointer Parser::parseMapping()
{
ASTNodeFactory nodeFactory(*this);
expectToken(Token::MAPPING);
expectToken(Token::LPAREN);
if (!Token::isElementaryTypeName(m_scanner->getCurrentToken()))
BOOST_THROW_EXCEPTION(createParserError("Expected elementary type name for mapping key type"));
ASTPointer keyType;
keyType = ASTNodeFactory(*this).createNode(m_scanner->getCurrentToken());
m_scanner->next();
expectToken(Token::ARROW);
bool const allowVar = false;
ASTPointer valueType = parseTypeName(allowVar);
nodeFactory.markEndPosition();
expectToken(Token::RPAREN);
return nodeFactory.createNode(keyType, valueType);
}
ASTPointer Parser::parseParameterList(bool _allowEmpty, bool _allowIndexed)
{
ASTNodeFactory nodeFactory(*this);
vector> parameters;
VarDeclParserOptions options;
options.allowIndexed = _allowIndexed;
expectToken(Token::LPAREN);
if (!_allowEmpty || m_scanner->getCurrentToken() != Token::RPAREN)
{
parameters.push_back(parseVariableDeclaration(options));
while (m_scanner->getCurrentToken() != Token::RPAREN)
{
expectToken(Token::COMMA);
parameters.push_back(parseVariableDeclaration(options));
}
}
nodeFactory.markEndPosition();
m_scanner->next();
return nodeFactory.createNode(parameters);
}
ASTPointer Parser::parseBlock()
{
ASTNodeFactory nodeFactory(*this);
expectToken(Token::LBRACE);
vector> statements;
while (m_scanner->getCurrentToken() != Token::RBRACE)
statements.push_back(parseStatement());
nodeFactory.markEndPosition();
expectToken(Token::RBRACE);
return nodeFactory.createNode(statements);
}
ASTPointer Parser::parseStatement()
{
ASTPointer statement;
switch (m_scanner->getCurrentToken())
{
case Token::IF:
return parseIfStatement();
case Token::WHILE:
return parseWhileStatement();
case Token::FOR:
return parseForStatement();
case Token::LBRACE:
return parseBlock();
// starting from here, all statements must be terminated by a semicolon
case Token::CONTINUE:
statement = ASTNodeFactory(*this).createNode();
m_scanner->next();
break;
case Token::BREAK:
statement = ASTNodeFactory(*this).createNode();
m_scanner->next();
break;
case Token::RETURN:
{
ASTNodeFactory nodeFactory(*this);
ASTPointer expression;
if (m_scanner->next() != Token::SEMICOLON)
{
expression = parseExpression();
nodeFactory.setEndPositionFromNode(expression);
}
statement = nodeFactory.createNode(expression);
break;
}
case Token::IDENTIFIER:
if (m_insideModifier && m_scanner->getCurrentLiteral() == "_")
{
statement = ASTNodeFactory(*this).createNode();
m_scanner->next();
return statement;
}
// fall-through
default:
statement = parseVarDefOrExprStmt();
}
expectToken(Token::SEMICOLON);
return statement;
}
ASTPointer Parser::parseIfStatement()
{
ASTNodeFactory nodeFactory(*this);
expectToken(Token::IF);
expectToken(Token::LPAREN);
ASTPointer condition = parseExpression();
expectToken(Token::RPAREN);
ASTPointer trueBody = parseStatement();
ASTPointer falseBody;
if (m_scanner->getCurrentToken() == Token::ELSE)
{
m_scanner->next();
falseBody = parseStatement();
nodeFactory.setEndPositionFromNode(falseBody);
}
else
nodeFactory.setEndPositionFromNode(trueBody);
return nodeFactory.createNode(condition, trueBody, falseBody);
}
ASTPointer Parser::parseWhileStatement()
{
ASTNodeFactory nodeFactory(*this);
expectToken(Token::WHILE);
expectToken(Token::LPAREN);
ASTPointer condition = parseExpression();
expectToken(Token::RPAREN);
ASTPointer body = parseStatement();
nodeFactory.setEndPositionFromNode(body);
return nodeFactory.createNode(condition, body);
}
ASTPointer Parser::parseForStatement()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer initExpression;
ASTPointer conditionExpression;
ASTPointer loopExpression;
expectToken(Token::FOR);
expectToken(Token::LPAREN);
// LTODO: Maybe here have some predicate like peekExpression() instead of checking for semicolon and RPAREN?
if (m_scanner->getCurrentToken() != Token::SEMICOLON)
initExpression = parseVarDefOrExprStmt();
expectToken(Token::SEMICOLON);
if (m_scanner->getCurrentToken() != Token::SEMICOLON)
conditionExpression = parseExpression();
expectToken(Token::SEMICOLON);
if (m_scanner->getCurrentToken() != Token::RPAREN)
loopExpression = parseExpressionStatement();
expectToken(Token::RPAREN);
ASTPointer body = parseStatement();
nodeFactory.setEndPositionFromNode(body);
return nodeFactory.createNode(initExpression,
conditionExpression,
loopExpression,
body);
}
ASTPointer Parser::parseVarDefOrExprStmt()
{
if (peekVariableDefinition())
return parseVariableDefinition();
else
return parseExpressionStatement();
}
ASTPointer Parser::parseVariableDefinition()
{
ASTNodeFactory nodeFactory(*this);
VarDeclParserOptions options;
options.allowVar = true;
ASTPointer variable = parseVariableDeclaration(options);
ASTPointer value;
if (m_scanner->getCurrentToken() == Token::ASSIGN)
{
m_scanner->next();
value = parseExpression();
nodeFactory.setEndPositionFromNode(value);
}
else
nodeFactory.setEndPositionFromNode(variable);
return nodeFactory.createNode(variable, value);
}
ASTPointer Parser::parseExpressionStatement()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer expression = parseExpression();
nodeFactory.setEndPositionFromNode(expression);
return nodeFactory.createNode(expression);
}
ASTPointer Parser::parseExpression()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer expression = parseBinaryExpression();
if (!Token::isAssignmentOp(m_scanner->getCurrentToken()))
return expression;
Token::Value assignmentOperator = expectAssignmentOperator();
ASTPointer rightHandSide = parseExpression();
nodeFactory.setEndPositionFromNode(rightHandSide);
return nodeFactory.createNode(expression, assignmentOperator, rightHandSide);
}
ASTPointer Parser::parseBinaryExpression(int _minPrecedence)
{
ASTNodeFactory nodeFactory(*this);
ASTPointer expression = parseUnaryExpression();
int precedence = Token::precedence(m_scanner->getCurrentToken());
for (; precedence >= _minPrecedence; --precedence)
while (Token::precedence(m_scanner->getCurrentToken()) == precedence)
{
Token::Value op = m_scanner->getCurrentToken();
m_scanner->next();
ASTPointer right = parseBinaryExpression(precedence + 1);
nodeFactory.setEndPositionFromNode(right);
expression = nodeFactory.createNode(expression, op, right);
}
return expression;
}
ASTPointer Parser::parseUnaryExpression()
{
ASTNodeFactory nodeFactory(*this);
Token::Value token = m_scanner->getCurrentToken();
if (Token::isUnaryOp(token) || Token::isCountOp(token))
{
// prefix expression
m_scanner->next();
ASTPointer subExpression = parseUnaryExpression();
nodeFactory.setEndPositionFromNode(subExpression);
return nodeFactory.createNode(token, subExpression, true);
}
else
{
// potential postfix expression
ASTPointer subExpression = parseLeftHandSideExpression();
token = m_scanner->getCurrentToken();
if (!Token::isCountOp(token))
return subExpression;
nodeFactory.markEndPosition();
m_scanner->next();
return nodeFactory.createNode(token, subExpression, false);
}
}
ASTPointer Parser::parseLeftHandSideExpression()
{
ASTNodeFactory nodeFactory(*this);
ASTPointer expression;
if (m_scanner->getCurrentToken() == Token::NEW)
{
expectToken(Token::NEW);
ASTPointer contractName(parseIdentifier());
nodeFactory.setEndPositionFromNode(contractName);
expression = nodeFactory.createNode(contractName);
}
else
expression = parsePrimaryExpression();
while (true)
{
switch (m_scanner->getCurrentToken())
{
case Token::LBRACK:
{
m_scanner->next();
ASTPointer index = parseExpression();
nodeFactory.markEndPosition();
expectToken(Token::RBRACK);
expression = nodeFactory.createNode(expression, index);
}
break;
case Token::PERIOD:
{
m_scanner->next();
nodeFactory.markEndPosition();
expression = nodeFactory.createNode(expression, expectIdentifierToken());
}
break;
case Token::LPAREN:
{
m_scanner->next();
vector> arguments;
vector> names;
std::tie(arguments, names) = parseFunctionCallArguments();
nodeFactory.markEndPosition();
expectToken(Token::RPAREN);
expression = nodeFactory.createNode(expression, arguments, names);
}
break;
default:
return expression;
}
}
}
ASTPointer Parser::parsePrimaryExpression()
{
ASTNodeFactory nodeFactory(*this);
Token::Value token = m_scanner->getCurrentToken();
ASTPointer expression;
switch (token)
{
case Token::TRUE_LITERAL:
case Token::FALSE_LITERAL:
expression = nodeFactory.createNode(token, getLiteralAndAdvance());
break;
case Token::NUMBER:
if (Token::isEtherSubdenomination(m_scanner->peekNextToken()))
{
ASTPointer literal = getLiteralAndAdvance();
nodeFactory.markEndPosition();
Literal::SubDenomination subdenomination = static_cast(m_scanner->getCurrentToken());
m_scanner->next();
expression = nodeFactory.createNode(token, literal, subdenomination);
break;
}
// fall-through
case Token::STRING_LITERAL:
nodeFactory.markEndPosition();
expression = nodeFactory.createNode(token, getLiteralAndAdvance());
break;
case Token::IDENTIFIER:
nodeFactory.markEndPosition();
expression = nodeFactory.createNode(getLiteralAndAdvance());
break;
case Token::LPAREN:
{
m_scanner->next();
ASTPointer expression = parseExpression();
expectToken(Token::RPAREN);
return expression;
}
default:
if (Token::isElementaryTypeName(token))
{
// used for casts
expression = nodeFactory.createNode(token);
m_scanner->next();
}
else
{
BOOST_THROW_EXCEPTION(createParserError("Expected primary expression."));
return ASTPointer(); // this is not reached
}
break;
}
return expression;
}
vector> Parser::parseFunctionCallListArguments()
{
vector> arguments;
if (m_scanner->getCurrentToken() != Token::RPAREN)
{
arguments.push_back(parseExpression());
while (m_scanner->getCurrentToken() != Token::RPAREN)
{
expectToken(Token::COMMA);
arguments.push_back(parseExpression());
}
}
return arguments;
}
pair>, vector>> Parser::parseFunctionCallArguments()
{
pair>, vector>> ret;
Token::Value token = m_scanner->getCurrentToken();
if (token == Token::LBRACE)
{
// call({arg1 : 1, arg2 : 2 })
expectToken(Token::LBRACE);
while (m_scanner->getCurrentToken() != Token::RBRACE)
{
ret.second.push_back(expectIdentifierToken());
expectToken(Token::COLON);
ret.first.push_back(parseExpression());
if (m_scanner->getCurrentToken() == Token::COMMA)
expectToken(Token::COMMA);
else
break;
}
expectToken(Token::RBRACE);
}
else
ret.first = parseFunctionCallListArguments();
return ret;
}
bool Parser::peekVariableDefinition()
{
// distinguish between variable definition (and potentially assignment) and expression statement
// (which include assignments to other expressions and pre-declared variables)
// We have a variable definition if we get a keyword that specifies a type name, or
// in the case of a user-defined type, we have two identifiers following each other.
return (m_scanner->getCurrentToken() == Token::MAPPING ||
m_scanner->getCurrentToken() == Token::VAR ||
((Token::isElementaryTypeName(m_scanner->getCurrentToken()) ||
m_scanner->getCurrentToken() == Token::IDENTIFIER) &&
m_scanner->peekNextToken() == Token::IDENTIFIER));
}
void Parser::expectToken(Token::Value _value)
{
if (m_scanner->getCurrentToken() != _value)
BOOST_THROW_EXCEPTION(createParserError(string("Expected token ") + string(Token::getName(_value))));
m_scanner->next();
}
Token::Value Parser::expectAssignmentOperator()
{
Token::Value op = m_scanner->getCurrentToken();
if (!Token::isAssignmentOp(op))
BOOST_THROW_EXCEPTION(createParserError("Expected assignment operator"));
m_scanner->next();
return op;
}
ASTPointer Parser::expectIdentifierToken()
{
if (m_scanner->getCurrentToken() != Token::IDENTIFIER)
BOOST_THROW_EXCEPTION(createParserError("Expected identifier"));
return getLiteralAndAdvance();
}
ASTPointer Parser::getLiteralAndAdvance()
{
ASTPointer identifier = make_shared(m_scanner->getCurrentLiteral());
m_scanner->next();
return identifier;
}
ASTPointer Parser::createEmptyParameterList()
{
ASTNodeFactory nodeFactory(*this);
nodeFactory.setLocationEmpty();
return nodeFactory.createNode(vector>());
}
ParserError Parser::createParserError(string const& _description) const
{
return ParserError() << errinfo_sourceLocation(Location(getPosition(), getPosition(), getSourceName()))
<< errinfo_comment(_description);
}
}
}