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Implemented two-pass parsing for PDDL problems.

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This commit is contained in:
Patrick Lühne 2016-06-09 14:39:03 +02:00
parent fb15a131ac
commit 87889f5efe
5 changed files with 175 additions and 112 deletions
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65
apps/plasp-app/main.cpp
View File

@ -61,53 +61,44 @@ int main(int argc, char **argv)
return EXIT_SUCCESS;
}
try
auto format = variablesMap["format"].as<std::string>();
std::transform(format.begin(), format.end(), format.begin(), ::tolower);
if (format == "sas")
{
auto format = variablesMap["format"].as<std::string>();
std::transform(format.begin(), format.end(), format.begin(), ::tolower);
if (format == "sas")
if (variablesMap.count("input"))
{
if (variablesMap.count("input"))
{
const auto &inputFiles = variablesMap["input"].as<std::vector<std::string>>();
const auto &inputFiles = variablesMap["input"].as<std::vector<std::string>>();
if (inputFiles.size() > 1)
{
std::cerr << "Error: Only one input file allowed for SAS translation" << std::endl;
printHelp();
return EXIT_FAILURE;
}
const auto sasDescription = plasp::sas::Description::fromFile(inputFiles.front());
const auto sasTranslator = plasp::sas::TranslatorASP(sasDescription);
sasTranslator.translate(std::cout);
}
else
if (inputFiles.size() > 1)
{
const auto sasDescription = plasp::sas::Description::fromStream(std::cin);
const auto sasTranslator = plasp::sas::TranslatorASP(sasDescription);
sasTranslator.translate(std::cout);
std::cerr << "Error: Only one input file allowed for SAS translation" << std::endl;
printHelp();
return EXIT_FAILURE;
}
const auto sasDescription = plasp::sas::Description::fromFile(inputFiles.front());
const auto sasTranslator = plasp::sas::TranslatorASP(sasDescription);
sasTranslator.translate(std::cout);
}
else if (format == "pddl")
else
{
if (variablesMap.count("input"))
{
const auto &inputFiles = variablesMap["input"].as<std::vector<std::string>>();
const auto pddlDescription = plasp::pddl::Description::fromFiles(inputFiles);
}
else
const auto pddlDescription = plasp::pddl::Description::fromStream(std::cin);
//std::cout << pddlDescription << std::endl;
const auto sasDescription = plasp::sas::Description::fromStream(std::cin);
const auto sasTranslator = plasp::sas::TranslatorASP(sasDescription);
sasTranslator.translate(std::cout);
}
}
catch (const std::exception &e)
else if (format == "pddl")
{
std::cerr << "Error: " << e.what() << std::endl << std::endl;
printHelp();
return EXIT_FAILURE;
if (variablesMap.count("input"))
{
const auto &inputFiles = variablesMap["input"].as<std::vector<std::string>>();
const auto pddlDescription = plasp::pddl::Description::fromFiles(inputFiles);
}
else
const auto pddlDescription = plasp::pddl::Description::fromStream(std::cin);
//std::cout << pddlDescription << std::endl;
}
return EXIT_SUCCESS;

12
include/plasp/pddl/Problem.h
View File

@ -22,10 +22,9 @@ class Problem
public:
Problem(Context &context, Domain &domain);
void findSections();
void parse();
bool isDeclared() const;
Domain &domain();
const Domain &domain() const;
@ -44,8 +43,6 @@ class Problem
void checkConsistency();
private:
void parseSection();
void parseRequirementSection();
void computeDerivedRequirements();
@ -57,13 +54,18 @@ class Problem
Context &m_context;
Domain &m_domain;
bool m_isDeclared;
std::string m_name;
utils::Parser::Position m_domainPosition;
utils::Parser::Position m_requirementsPosition;
Requirements m_requirements;
utils::Parser::Position m_objectsPosition;
expressions::Constants m_objects;
utils::Parser::Position m_initialStatePosition;
std::unique_ptr<InitialState> m_initialState;
};

4
src/plasp/pddl/Description.cpp
View File

@ -148,8 +148,8 @@ void Description::findSections()
m_problemPosition = position;
skipSection(parser);
skipSection(parser);
parser.seek(position);
m_problem->findSections();
}
else
{

12
src/plasp/pddl/Domain.cpp
View File

@ -69,6 +69,8 @@ void Domain::findSections()
parser.expect<std::string>("(");
parser.expect<std::string>(":");
const auto sectionIdentifierPosition = parser.position();
// Save the parser position of the individual sections for later parsing
if (parser.probe<std::string>("requirements"))
setSectionPosition("requirements", m_requirementsPosition, position, true);
@ -88,9 +90,13 @@ void Domain::findSections()
|| parser.probe<std::string>("durative-action")
|| parser.probe<std::string>("derived"))
{
parser.seek(position);
m_context.logger.parserWarning(parser, "Section type currently unsupported");
parser.advance();
parser.seek(sectionIdentifierPosition);
const auto sectionIdentifier = parser.parseIdentifier(isIdentifier);
m_context.logger.parserWarning(parser, "Section type \"" + sectionIdentifier + "\" currently unsupported");
parser.seek(sectionIdentifierPosition);
}
else
{

194
src/plasp/pddl/Problem.cpp
View File

@ -23,45 +23,118 @@ namespace pddl
Problem::Problem(Context &context, Domain &domain)
: m_context(context),
m_domain(domain),
m_isDeclared{false}
m_domainPosition{-1},
m_requirementsPosition{-1},
m_objectsPosition{-1},
m_initialStatePosition{-1}
{
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void Problem::findSections()
{
auto &parser = m_context.parser;
parser.expect<std::string>("(");
parser.expect<std::string>("define");
parser.expect<std::string>("(");
parser.expect<std::string>("problem");
m_name = parser.parseIdentifier(isIdentifier);
std::cout << "Found problem " << m_name << std::endl;
parser.expect<std::string>(")");
const auto setSectionPosition =
[&](const std::string &sectionName, auto &sectionPosition, const auto value, bool unique = false)
{
if (unique && sectionPosition != -1)
throw utils::ParserException(parser, "Only one \":" + sectionName + "\" section allowed");
sectionPosition = value;
};
parser.skipWhiteSpace();
while (parser.currentCharacter() != ')')
{
const auto position = parser.position();
parser.expect<std::string>("(");
parser.expect<std::string>(":");
const auto sectionIdentifierPosition = parser.position();
// TODO: check order of the sections
if (parser.probe<std::string>("domain"))
setSectionPosition("domain", m_domainPosition, position, true);
else if (parser.probe<std::string>("requirements"))
setSectionPosition("requirements", m_requirementsPosition, position, true);
else if (parser.probe<std::string>("objects"))
setSectionPosition("objects", m_objectsPosition, position, true);
else if (parser.probe<std::string>("init"))
setSectionPosition("init", m_initialStatePosition, position, true);
else if (parser.probe<std::string>("goal")
|| parser.probe<std::string>("constraints")
|| parser.probe<std::string>("metric")
|| parser.probe<std::string>("length"))
{
parser.seek(sectionIdentifierPosition);
const auto sectionIdentifier = parser.parseIdentifier(isIdentifier);
m_context.logger.parserWarning(parser, "Section type \"" + sectionIdentifier + "\" currently unsupported");
parser.seek(sectionIdentifierPosition);
}
else
{
const auto sectionIdentifier = parser.parseIdentifier(isIdentifier);
parser.seek(position);
throw utils::ParserException(m_context.parser, "Unknown problem section \"" + sectionIdentifier + "\"");
}
// Skip section for now and parse it later
skipSection(parser);
parser.skipWhiteSpace();
}
parser.expect<std::string>(")");
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void Problem::parse()
{
m_context.parser.expect<std::string>("(");
m_context.parser.expect<std::string>("define");
m_context.parser.expect<std::string>("(");
m_context.parser.expect<std::string>("problem");
auto &parser = m_context.parser;
m_name = m_context.parser.parseIdentifier(isIdentifier);
if (m_domainPosition == -1)
throw ConsistencyException("Problem description does not specify the corresponding domain");
std::cout << "Parsing problem " << m_name << std::endl;
parser.seek(m_domainPosition);
parseDomainSection();
m_context.parser.expect<std::string>(")");
while (true)
if (m_requirementsPosition != -1)
{
m_context.parser.skipWhiteSpace();
if (m_context.parser.currentCharacter() == ')')
break;
parseSection();
parser.seek(m_requirementsPosition);
parseRequirementSection();
}
computeDerivedRequirements();
if (m_objectsPosition != -1)
{
parser.seek(m_objectsPosition);
parseObjectSection();
}
m_isDeclared = true;
}
if (m_initialStatePosition == -1)
throw ConsistencyException("Problem description does not specify an initial state");
////////////////////////////////////////////////////////////////////////////////////////////////////
bool Problem::isDeclared() const
{
return m_isDeclared;
parser.seek(m_initialStatePosition);
parseInitialStateSection();
}
////////////////////////////////////////////////////////////////////////////////////////////////////
@ -108,64 +181,43 @@ const expressions::Constants &Problem::objects() const
////////////////////////////////////////////////////////////////////////////////////////////////////
void Problem::parseSection()
void Problem::parseDomainSection()
{
auto &parser = m_context.parser;
parser.expect<std::string>("(");
parser.expect<std::string>(":");
parser.expect<std::string>("domain");
// TODO: check order of the sections
if (parser.probe<std::string>("domain"))
parseDomainSection();
else if (parser.probe<std::string>("requirements"))
parseRequirementSection();
else if (parser.probe<std::string>("objects"))
parseObjectSection();
else if (parser.probe<std::string>("init"))
parseInitialStateSection();
else if (parser.probe<std::string>("goal")
|| parser.probe<std::string>("constraints")
|| parser.probe<std::string>("metric")
|| parser.probe<std::string>("length"))
{
std::cout << "Skipping section" << std::endl;
skipSection(m_context.parser);
}
else
{
const auto sectionIdentifier = parser.parseIdentifier(isIdentifier);
throw utils::ParserException(m_context.parser, "Unknown problem section \"" + sectionIdentifier + "\"");
}
}
parser.skipWhiteSpace();
////////////////////////////////////////////////////////////////////////////////////////////////////
void Problem::parseDomainSection()
{
m_context.parser.skipWhiteSpace();
const auto domainName = m_context.parser.parseIdentifier(isIdentifier);
const auto domainName = parser.parseIdentifier(isIdentifier);
if (m_domain.name() != domainName)
throw utils::ParserException(m_context.parser, "Domains do not match (\"" + m_domain.name() + "\" and \"" + domainName + "\")");
throw utils::ParserException(parser, "Domains do not match (\"" + m_domain.name() + "\" and \"" + domainName + "\")");
m_context.parser.expect<std::string>(")");
parser.expect<std::string>(")");
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void Problem::parseRequirementSection()
{
m_context.parser.skipWhiteSpace();
auto &parser = m_context.parser;
while (m_context.parser.currentCharacter() != ')')
parser.expect<std::string>("(");
parser.expect<std::string>(":");
parser.expect<std::string>("requirements");
parser.skipWhiteSpace();
while (parser.currentCharacter() != ')')
{
m_context.parser.expect<std::string>(":");
parser.expect<std::string>(":");
m_requirements.emplace_back(Requirement::parse(m_context));
m_context.parser.skipWhiteSpace();
parser.skipWhiteSpace();
}
// TODO: do this check only once the domain is parsed
@ -173,7 +225,7 @@ void Problem::parseRequirementSection()
if (m_requirements.empty())
m_requirements.emplace_back(Requirement::Type::STRIPS);
m_context.parser.expect<std::string>(")");
parser.expect<std::string>(")");
}
////////////////////////////////////////////////////////////////////////////////////////////////////
@ -246,21 +298,33 @@ void Problem::computeDerivedRequirements()
void Problem::parseObjectSection()
{
m_context.parser.skipWhiteSpace();
auto &parser = m_context.parser;
parser.expect<std::string>("(");
parser.expect<std::string>(":");
parser.expect<std::string>("objects");
parser.skipWhiteSpace();
// Store constants
expressions::Constant::parseTypedDeclarations(m_context, *this);
m_context.parser.expect<std::string>(")");
parser.expect<std::string>(")");
}
////////////////////////////////////////////////////////////////////////////////////////////////////
void Problem::parseInitialStateSection()
{
auto &parser = m_context.parser;
parser.expect<std::string>("(");
parser.expect<std::string>(":");
parser.expect<std::string>("init");
m_initialState = InitialState::parseDeclaration(m_context, *this);
m_context.parser.expect<std::string>(")");
parser.expect<std::string>(")");
}
////////////////////////////////////////////////////////////////////////////////////////////////////