2016-06-02 16:06:11 +02:00
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#include <plasp/pddl/Expression.h>
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#include <plasp/pddl/Context.h>
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#include <plasp/pddl/Identifier.h>
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2016-06-02 17:35:01 +02:00
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#include <plasp/pddl/expressions/AndExpression.h>
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2016-06-02 18:31:47 +02:00
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#include <plasp/pddl/expressions/OrExpression.h>
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#include <plasp/pddl/expressions/PredicateExpression.h>
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2016-06-02 16:06:11 +02:00
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#include <plasp/utils/ParserException.h>
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namespace plasp
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{
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namespace pddl
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{
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////////////////////////////////////////////////////////////////////////////////////////////////////
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//
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// Expression
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//
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-02 21:53:10 +02:00
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std::unique_ptr<Expression> parseExpressionContent(const std::string &expressionIdentifier, utils::Parser &parser, Context &context, const Variables ¶meters);
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std::unique_ptr<Expression> parseEffectBodyExpressionContent(const std::string &expressionIdentifier, utils::Parser &parser, Context &context, const Variables ¶meters);
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////////////////////////////////////////////////////////////////////////////////////////////////////
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void throwUnsupported(const utils::Parser &parser, const std::string &expressionIdentifier)
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{
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throw utils::ParserException(parser.row(), parser.column(), "Expression type \"" + expressionIdentifier + "\" currently unsupported");
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}
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2016-06-02 18:31:47 +02:00
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-02 17:35:01 +02:00
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std::unique_ptr<Expression> parsePreconditionExpression(utils::Parser &parser, Context &context, const Variables ¶meters)
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2016-06-02 16:06:11 +02:00
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{
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parser.skipWhiteSpace();
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parser.expect<std::string>("(");
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const auto expressionIdentifier = parser.parseIdentifier(isIdentifier);
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2016-06-02 17:35:01 +02:00
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std::unique_ptr<Expression> expression;
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2016-06-02 16:06:11 +02:00
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2016-06-02 17:35:01 +02:00
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if (expressionIdentifier == "and")
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expression = expressions::AndExpression::parse(parser, context, parameters, parsePreconditionExpression);
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2016-06-02 21:53:10 +02:00
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else if (expressionIdentifier == "forall"
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|| expressionIdentifier == "preference")
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{
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throwUnsupported(parser, expressionIdentifier);
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}
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2016-06-02 17:35:01 +02:00
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else
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2016-06-02 21:53:10 +02:00
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expression = parseExpressionContent(expressionIdentifier, parser, context, parameters);
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2016-06-02 18:31:47 +02:00
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parser.expect<std::string>(")");
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return expression;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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std::unique_ptr<Expression> parseExpression(utils::Parser &parser, Context &context, const Variables ¶meters)
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{
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parser.skipWhiteSpace();
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parser.expect<std::string>("(");
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const auto expressionIdentifier = parser.parseIdentifier(isIdentifier);
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2016-06-02 21:53:10 +02:00
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auto expression = parseExpressionContent(expressionIdentifier, parser, context, parameters);
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2016-06-02 16:06:11 +02:00
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parser.expect<std::string>(")");
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2016-06-02 16:28:08 +02:00
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2016-06-02 17:35:01 +02:00
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return expression;
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2016-06-02 16:06:11 +02:00
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-02 21:53:10 +02:00
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std::unique_ptr<Expression> parseExpressionContent(const std::string &expressionIdentifier, utils::Parser &parser, Context &context, const Variables ¶meters)
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2016-06-02 18:31:47 +02:00
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{
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parser.skipWhiteSpace();
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std::unique_ptr<Expression> expression;
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if (expressionIdentifier == "and")
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expression = expressions::AndExpression::parse(parser, context, parameters, parseExpression);
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else if (expressionIdentifier == "or")
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expression = expressions::OrExpression::parse(parser, context, parameters, parseExpression);
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else if (expressionIdentifier == "not"
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|| expressionIdentifier == "imply"
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|| expressionIdentifier == "exists"
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|| expressionIdentifier == "forall"
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|| expressionIdentifier == "-"
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|| expressionIdentifier == "="
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|| expressionIdentifier == "*"
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|| expressionIdentifier == "+"
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|| expressionIdentifier == "-"
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|| expressionIdentifier == "/"
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|| expressionIdentifier == ">"
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|| expressionIdentifier == "<"
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|| expressionIdentifier == "="
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|| expressionIdentifier == ">="
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|| expressionIdentifier == "<=")
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{
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2016-06-02 21:53:10 +02:00
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throwUnsupported(parser, expressionIdentifier);
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}
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else
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{
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// Check if predicate with that name exists
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const auto match = std::find_if(context.predicates.cbegin(), context.predicates.cend(),
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[&](const auto &predicate)
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{
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return predicate->name() == expressionIdentifier;
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});
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// If predicate exists, parse it
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if (match != context.predicates.cend())
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expression = expressions::PredicateExpression::parse(expressionIdentifier, parser, context, parameters);
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else
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throw utils::ParserException(parser.row(), parser.column(), "Expression \"" + expressionIdentifier + "\" not allowed in this context");
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}
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return expression;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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std::unique_ptr<Expression> parseEffectExpression(utils::Parser &parser, Context &context, const Variables ¶meters)
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{
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parser.skipWhiteSpace();
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parser.expect<std::string>("(");
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const auto expressionIdentifier = parser.parseIdentifier(isIdentifier);
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std::cout << "Parsing effect expression " << expressionIdentifier << std::endl;
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std::unique_ptr<Expression> expression;
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if (expressionIdentifier == "and")
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expression = expressions::AndExpression::parse(parser, context, parameters, parseEffectExpression);
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else if (expressionIdentifier == "forall"
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|| expressionIdentifier == "when")
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{
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throwUnsupported(parser, expressionIdentifier);
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}
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else
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expression = parseEffectBodyExpressionContent(expressionIdentifier, parser, context, parameters);
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parser.expect<std::string>(")");
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return expression;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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std::unique_ptr<Expression> parseEffectBodyExpressionContent(const std::string &expressionIdentifier, utils::Parser &parser, Context &context, const Variables ¶meters)
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{
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parser.skipWhiteSpace();
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std::unique_ptr<Expression> expression;
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if (expressionIdentifier == "not"
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|| expressionIdentifier == "="
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|| expressionIdentifier == "assign"
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|| expressionIdentifier == "scale-up"
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|| expressionIdentifier == "scale-down"
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|| expressionIdentifier == "increase"
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|| expressionIdentifier == "decrease")
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{
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throwUnsupported(parser, expressionIdentifier);
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2016-06-02 18:31:47 +02:00
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}
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else
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{
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// Check if predicate with that name exists
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const auto match = std::find_if(context.predicates.cbegin(), context.predicates.cend(),
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[&](const auto &predicate)
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{
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return predicate->name() == expressionIdentifier;
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});
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// If predicate exists, parse it
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if (match != context.predicates.cend())
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expression = expressions::PredicateExpression::parse(expressionIdentifier, parser, context, parameters);
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else
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2016-06-02 21:53:10 +02:00
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throw utils::ParserException(parser.row(), parser.column(), "Expression \"" + expressionIdentifier + "\" not allowed in this context");
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2016-06-02 18:31:47 +02:00
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}
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return expression;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-02 16:06:11 +02:00
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}
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}
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