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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2016-06-07 13:26:19 +02:00
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#include <plasp/pddl/Domain.h>
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#include <plasp/pddl/ExpressionContext.h>
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2016-06-09 01:25:18 +02:00
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#include <plasp/pddl/IO.h>
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2016-06-03 13:33:05 +02:00
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#include <plasp/pddl/expressions/And.h>
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2016-09-06 16:57:31 +02:00
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#include <plasp/pddl/expressions/Exists.h>
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#include <plasp/pddl/expressions/ForAll.h>
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2016-06-04 17:20:25 +02:00
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#include <plasp/pddl/expressions/Imply.h>
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2016-06-03 13:33:05 +02:00
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#include <plasp/pddl/expressions/Not.h>
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#include <plasp/pddl/expressions/Or.h>
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#include <plasp/pddl/expressions/Predicate.h>
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2016-06-03 17:12:39 +02:00
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#include <plasp/pddl/expressions/PredicateDeclaration.h>
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2016-06-14 01:31:22 +02:00
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#include <plasp/pddl/expressions/Unsupported.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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2016-09-04 19:29:05 +02:00
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ExpressionPointer Expression::normalized()
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2016-09-04 23:30:08 +02:00
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{
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2016-09-07 00:34:26 +02:00
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return reduced()->negationNormalized()->prenex()->simplified();
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2016-09-04 23:30:08 +02:00
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-09-05 00:06:09 +02:00
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ExpressionPointer Expression::reduced()
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2016-09-04 23:30:08 +02:00
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{
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return this;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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ExpressionPointer Expression::negationNormalized()
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2016-09-04 19:29:05 +02:00
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{
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return this;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-09-08 02:40:51 +02:00
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ExpressionPointer Expression::prenex(Expression::Type)
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2016-09-07 00:34:26 +02:00
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{
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return this;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-09-08 02:40:51 +02:00
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ExpressionPointer Expression::moveUpQuantifiers(ExpressionPointer parent, ExpressionPointer &child)
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2016-09-07 00:34:26 +02:00
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{
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BOOST_ASSERT(child);
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if (child->expressionType() == Expression::Type::Exists)
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{
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auto quantifiedExpression = expressions::ExistsPointer(dynamic_cast<expressions::Exists *>(child.get()));
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// Move argument up
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child = quantifiedExpression->argument();
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// Move quantifier up
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quantifiedExpression->setArgument(parent);
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// Make parent point to the quantifier that has been moved up
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return quantifiedExpression;
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}
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else if (child->expressionType() == Expression::Type::ForAll)
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{
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auto quantifiedExpression = expressions::ForAllPointer(dynamic_cast<expressions::ForAll *>(child.get()));
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// Move argument up
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child = quantifiedExpression->argument();
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// Move quantifier up
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quantifiedExpression->setArgument(parent);
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// Make parent point to the quantifier that has been moved up
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return quantifiedExpression;
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}
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return parent;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-09-05 00:37:43 +02:00
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ExpressionPointer Expression::simplified()
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{
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return this;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-09-04 19:29:05 +02:00
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ExpressionPointer Expression::negated()
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{
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if (expressionType() == Type::Not)
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{
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auto ¬Expression = dynamic_cast<expressions::Not &>(*this);
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return notExpression.argument();
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}
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auto notExpression = expressions::NotPointer(new expressions::Not);
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notExpression->setArgument(this);
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return notExpression;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-09 17:51:10 +02:00
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ExpressionPointer parseEffectBodyExpression(Context &context, ExpressionContext &expressionContext);
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2016-06-07 13:26:19 +02:00
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ExpressionPointer parsePredicate(Context &context, ExpressionContext &expressionContext);
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2016-06-02 21:53:10 +02:00
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-04 16:24:10 +02:00
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ExpressionPointer parsePreconditionExpression(Context &context,
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2016-06-07 13:26:19 +02:00
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ExpressionContext &expressionContext)
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2016-06-02 16:06:11 +02:00
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{
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2016-06-09 17:51:10 +02:00
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auto &parser = context.parser;
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2016-06-02 16:06:11 +02:00
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2016-06-09 17:51:10 +02:00
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parser.skipWhiteSpace();
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2016-06-02 16:06:11 +02:00
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2016-06-03 13:20:52 +02:00
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ExpressionPointer expression;
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2016-06-02 16:06:11 +02:00
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2016-09-06 22:36:48 +02:00
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if ((expression = expressions::And::parse(context, expressionContext, parsePreconditionExpression))
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|| (expression = expressions::ForAll::parse(context, expressionContext, parsePreconditionExpression)))
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{
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2016-09-06 16:57:31 +02:00
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return expression;
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2016-09-06 22:36:48 +02:00
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}
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2016-09-06 16:57:31 +02:00
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2016-06-09 17:51:10 +02:00
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const auto position = parser.position();
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parser.expect<std::string>("(");
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const auto expressionIdentifierPosition = parser.position();
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2016-09-06 16:57:31 +02:00
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if (parser.testIdentifierAndSkip("preference"))
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2016-06-02 21:53:10 +02:00
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{
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2016-06-09 17:51:10 +02:00
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// TODO: refactor
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parser.seek(expressionIdentifierPosition);
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2016-08-02 19:58:54 +02:00
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const auto expressionIdentifier = parser.parseIdentifier();
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2016-06-09 17:51:10 +02:00
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parser.seek(position);
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2016-06-14 01:31:22 +02:00
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return expressions::Unsupported::parse(context);
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2016-06-02 21:53:10 +02:00
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}
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2016-06-02 18:31:47 +02:00
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2016-06-09 17:51:10 +02:00
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parser.seek(position);
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return parseExpression(context, expressionContext);
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2016-06-02 18:31:47 +02:00
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-07 13:26:19 +02:00
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ExpressionPointer parseExpression(Context &context, ExpressionContext &expressionContext)
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2016-06-02 18:31:47 +02:00
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{
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2016-06-09 17:51:10 +02:00
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auto &parser = context.parser;
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2016-06-02 18:31:47 +02:00
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2016-06-09 17:51:10 +02:00
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parser.skipWhiteSpace();
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2016-06-02 18:31:47 +02:00
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2016-06-09 17:51:10 +02:00
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ExpressionPointer expression;
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2016-06-02 16:06:11 +02:00
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2016-06-09 17:51:10 +02:00
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if ((expression = expressions::And::parse(context, expressionContext, parseExpression))
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|| (expression = expressions::Or::parse(context, expressionContext, parseExpression))
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2016-09-06 16:57:31 +02:00
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|| (expression = expressions::Exists::parse(context, expressionContext, parseExpression))
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|| (expression = expressions::ForAll::parse(context, expressionContext, parseExpression))
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2016-06-09 17:51:10 +02:00
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|| (expression = expressions::Not::parse(context, expressionContext, parseExpression))
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|| (expression = expressions::Imply::parse(context, expressionContext, parseExpression))
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|| (expression = expressions::Predicate::parse(context, expressionContext)))
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{
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return expression;
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}
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2016-06-02 16:06:11 +02:00
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2016-06-09 17:51:10 +02:00
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const auto position = parser.position();
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parser.expect<std::string>("(");
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const auto expressionIdentifierPosition = parser.position();
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2016-09-06 16:57:31 +02:00
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if (parser.testIdentifierAndSkip("-")
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2016-08-02 19:58:54 +02:00
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|| parser.testIdentifierAndSkip("=")
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|| parser.testIdentifierAndSkip("*")
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|| parser.testIdentifierAndSkip("+")
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|| parser.testIdentifierAndSkip("-")
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|| parser.testIdentifierAndSkip("/")
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|| parser.testIdentifierAndSkip(">")
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|| parser.testIdentifierAndSkip("<")
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|| parser.testIdentifierAndSkip("=")
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|| parser.testIdentifierAndSkip(">=")
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|| parser.testIdentifierAndSkip("<="))
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2016-06-02 18:31:47 +02:00
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{
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2016-06-09 17:51:10 +02:00
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parser.seek(expressionIdentifierPosition);
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2016-08-02 19:58:54 +02:00
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const auto expressionIdentifier = parser.parseIdentifier();
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2016-06-09 17:51:10 +02:00
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parser.seek(position);
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2016-06-14 01:31:22 +02:00
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return expressions::Unsupported::parse(context);
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2016-06-02 21:53:10 +02:00
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}
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2016-06-09 17:51:10 +02:00
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parser.seek(expressionIdentifierPosition);
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2016-08-02 19:58:54 +02:00
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const auto expressionIdentifier = parser.parseIdentifier();
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2016-06-04 18:12:41 +02:00
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2016-06-09 17:51:10 +02:00
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parser.seek(position);
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2016-08-02 19:58:54 +02:00
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throw utils::ParserException(parser.coordinate(), "expression type “" + expressionIdentifier + "” unknown or not allowed in this context");
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2016-06-02 21:53:10 +02:00
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-07 13:26:19 +02:00
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ExpressionPointer parseEffectExpression(Context &context, ExpressionContext &expressionContext)
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2016-06-02 21:53:10 +02:00
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{
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2016-06-09 17:51:10 +02:00
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auto &parser = context.parser;
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2016-06-02 21:53:10 +02:00
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2016-06-03 13:20:52 +02:00
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ExpressionPointer expression;
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2016-06-02 21:53:10 +02:00
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2016-09-06 22:36:48 +02:00
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if ((expression = expressions::And::parse(context, expressionContext, parseEffectExpression))
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|| (expression = expressions::ForAll::parse(context, expressionContext, parseEffectExpression)))
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{
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2016-06-09 17:51:10 +02:00
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return expression;
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2016-09-06 22:36:48 +02:00
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}
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2016-06-09 17:51:10 +02:00
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const auto position = parser.position();
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parser.expect<std::string>("(");
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const auto expressionIdentifierPosition = parser.position();
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2016-09-06 22:36:48 +02:00
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if (parser.testIdentifierAndSkip("when"))
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2016-06-02 21:53:10 +02:00
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{
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2016-06-09 17:51:10 +02:00
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parser.seek(expressionIdentifierPosition);
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2016-08-02 19:58:54 +02:00
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const auto expressionIdentifier = parser.parseIdentifier();
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2016-06-09 17:51:10 +02:00
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parser.seek(position);
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2016-06-14 01:31:22 +02:00
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return expressions::Unsupported::parse(context);
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2016-06-02 21:53:10 +02:00
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}
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2016-06-09 17:51:10 +02:00
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parser.seek(position);
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return parseEffectBodyExpression(context, expressionContext);
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2016-06-02 21:53:10 +02:00
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-09 17:51:10 +02:00
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ExpressionPointer parseEffectBodyExpression(Context &context, ExpressionContext &expressionContext)
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2016-06-02 21:53:10 +02:00
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{
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2016-06-09 17:51:10 +02:00
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auto &parser = context.parser;
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2016-06-03 13:20:52 +02:00
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ExpressionPointer expression;
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2016-06-02 21:53:10 +02:00
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2016-06-09 17:51:10 +02:00
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if ((expression = expressions::Not::parse(context, expressionContext, parsePredicate))
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|| (expression = expressions::Predicate::parse(context, expressionContext)))
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{
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return expression;
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}
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const auto position = parser.position();
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parser.expect<std::string>("(");
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2016-06-04 18:12:41 +02:00
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2016-06-09 17:51:10 +02:00
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const auto expressionIdentifierPosition = parser.position();
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2016-08-02 19:58:54 +02:00
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if (parser.testIdentifierAndSkip("=")
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|| parser.testIdentifierAndSkip("assign")
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|| parser.testIdentifierAndSkip("scale-up")
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|| parser.testIdentifierAndSkip("scale-down")
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|| parser.testIdentifierAndSkip("increase")
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|| parser.testIdentifierAndSkip("decrease"))
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2016-06-02 21:53:10 +02:00
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{
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2016-06-09 17:51:10 +02:00
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parser.seek(expressionIdentifierPosition);
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2016-08-02 19:58:54 +02:00
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const auto expressionIdentifier = parser.parseIdentifier();
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2016-06-09 17:51:10 +02:00
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parser.seek(position);
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2016-06-14 01:31:22 +02:00
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return expressions::Unsupported::parse(context);
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2016-06-02 18:31:47 +02:00
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}
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2016-06-09 17:51:10 +02:00
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parser.seek(expressionIdentifierPosition);
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2016-08-02 19:58:54 +02:00
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const auto expressionIdentifier = parser.parseIdentifier();
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2016-06-07 13:26:19 +02:00
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2016-06-09 17:51:10 +02:00
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parser.seek(position);
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2016-08-02 19:58:54 +02:00
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throw utils::ParserException(parser.coordinate(), "expression type “" + expressionIdentifier + "” unknown or 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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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-07 13:26:19 +02:00
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ExpressionPointer parsePredicate(Context &context, ExpressionContext &expressionContext)
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2016-06-02 22:31:02 +02:00
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{
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2016-08-02 19:58:54 +02:00
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auto &parser = context.parser;
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2016-06-03 13:20:52 +02:00
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ExpressionPointer expression;
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2016-06-02 22:31:02 +02:00
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2016-06-09 17:51:10 +02:00
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if ((expression = expressions::Predicate::parse(context, expressionContext)))
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return expression;
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2016-06-02 22:31:02 +02:00
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2016-08-02 19:58:54 +02:00
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throw utils::ParserException(parser.coordinate(), "expected predicate");
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2016-06-02 22:31:02 +02:00
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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2016-06-13 19:02:15 +02:00
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ExpressionPointer parseLiteral(Context &context, ExpressionContext &expressionContext)
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{
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ExpressionPointer expression;
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if ((expression = parseAtomicFormula(context, expressionContext))
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|| (expression = expressions::Not::parse(context, expressionContext, parseAtomicFormula)))
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{
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return expression;
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}
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return nullptr;
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////
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ExpressionPointer parseAtomicFormula(Context &context, ExpressionContext &expressionContext)
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{
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auto &parser = context.parser;
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ExpressionPointer expression;
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|
|
if ((expression = expressions::Predicate::parse(context, expressionContext)))
|
|
|
|
return expression;
|
|
|
|
|
|
|
|
const auto position = parser.position();
|
|
|
|
|
2016-08-02 19:58:54 +02:00
|
|
|
if (!parser.testAndSkip<std::string>("("))
|
2016-06-14 01:31:22 +02:00
|
|
|
return nullptr;
|
2016-06-13 19:02:15 +02:00
|
|
|
|
|
|
|
const auto expressionIdentifierPosition = parser.position();
|
|
|
|
|
2016-08-02 19:58:54 +02:00
|
|
|
if (parser.testIdentifierAndSkip("="))
|
2016-06-13 19:02:15 +02:00
|
|
|
{
|
|
|
|
parser.seek(expressionIdentifierPosition);
|
2016-08-02 19:58:54 +02:00
|
|
|
const auto expressionIdentifier = parser.parseIdentifier();
|
2016-06-13 19:02:15 +02:00
|
|
|
|
|
|
|
parser.seek(position);
|
2016-06-14 01:31:22 +02:00
|
|
|
return expressions::Unsupported::parse(context);
|
2016-06-13 19:02:15 +02:00
|
|
|
}
|
|
|
|
|
2016-06-14 01:31:22 +02:00
|
|
|
parser.seek(position);
|
2016-06-13 19:02:15 +02:00
|
|
|
return nullptr;
|
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
2016-06-02 16:06:11 +02:00
|
|
|
}
|
|
|
|
}
|