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Preparations for returning multiple formulas per input rule (as necessary with head aggregates).

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This commit is contained in:
Patrick Lühne 2017-03-23 01:23:17 +01:00
parent 9084e72303
commit 283cdd2abf
Signed by: patrick
GPG Key ID: 05F3611E97A70ABF
2 changed files with 49 additions and 40 deletions
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58
include/anthem/StatementVisitor.h
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@ -18,7 +18,7 @@ namespace anthem
struct StatementVisitor struct StatementVisitor
{ {
std::experimental::optional<ast::Formula> visit(const Clingo::AST::Program &program, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::Program &program, const Clingo::AST::Statement &statement, Context &context)
{ {
// TODO: refactor // TODO: refactor
context.logger.log(output::Priority::Debug, (std::string("[program] ") + program.name).c_str()); context.logger.log(output::Priority::Debug, (std::string("[program] ") + program.name).c_str());
@ -26,10 +26,10 @@ struct StatementVisitor
if (!program.parameters.empty()) if (!program.parameters.empty())
throwErrorAtLocation(statement.location, "program parameters currently unsupported", context); throwErrorAtLocation(statement.location, "program parameters currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::Rule &rule, const Clingo::AST::Statement &, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::Rule &rule, const Clingo::AST::Statement &, Context &context)
{ {
context.reset(); context.reset();
@ -44,7 +44,7 @@ struct StatementVisitor
if (!consequent) if (!consequent)
{ {
context.logger.log(output::Priority::Error, "could not translate formula consequent"); context.logger.log(output::Priority::Error, "could not translate formula consequent");
return std::experimental::nullopt; return {};
} }
// Print auxiliary variables replacing the head atom’s arguments // Print auxiliary variables replacing the head atom’s arguments
@ -82,77 +82,77 @@ struct StatementVisitor
// Use “true” as the consequent in case it is empty // Use “true” as the consequent in case it is empty
if (antecedent.arguments.empty()) if (antecedent.arguments.empty())
return ast::Formula::make<ast::Implies>(ast::Boolean(true), std::move(consequent.value())); return {ast::Formula::make<ast::Implies>(ast::Boolean(true), std::move(consequent.value()))};
else if (antecedent.arguments.size() == 1) else if (antecedent.arguments.size() == 1)
return ast::Formula::make<ast::Implies>(std::move(antecedent.arguments[0]), std::move(consequent.value())); return {ast::Formula::make<ast::Implies>(std::move(antecedent.arguments[0]), std::move(consequent.value()))};
return ast::Formula::make<ast::Implies>(std::move(antecedent), std::move(consequent.value())); return {ast::Formula::make<ast::Implies>(std::move(antecedent), std::move(consequent.value()))};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::Definition &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::Definition &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“definition” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“definition” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::ShowSignature &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::ShowSignature &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“show signature” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“show signature” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::ShowTerm &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::ShowTerm &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“show term” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“show term” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::Minimize &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::Minimize &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“minimize” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“minimize” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::Script &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::Script &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“script” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“script” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::External &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::External &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“external” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“external” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::Edge &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::Edge &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“edge” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“edge” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::Heuristic &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::Heuristic &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“heuristic” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“heuristic” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::ProjectAtom &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::ProjectAtom &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“project atom” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“project atom” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::ProjectSignature &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::ProjectSignature &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“project signature” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“project signature” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
std::experimental::optional<ast::Formula> visit(const Clingo::AST::TheoryDefinition &, const Clingo::AST::Statement &statement, Context &context) std::vector<ast::Formula> visit(const Clingo::AST::TheoryDefinition &, const Clingo::AST::Statement &statement, Context &context)
{ {
throwErrorAtLocation(statement.location, "“theory definition” statements currently unsupported", context); throwErrorAtLocation(statement.location, "“theory definition” statements currently unsupported", context);
return std::experimental::nullopt; return {};
} }
}; };

31
src/anthem/Translation.cpp
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@ -39,22 +39,31 @@ void translate(const char *fileName, std::istream &stream, Context &context)
auto fileContent = std::string(std::istreambuf_iterator<char>(stream), {}); auto fileContent = std::string(std::istreambuf_iterator<char>(stream), {});
const auto translateStatement = bool isFirstStatement = true;
[&context](const Clingo::AST::Statement &statement)
const auto printFormula =
[&context, &isFirstStatement](const ast::Formula &formula)
{ {
auto formula = statement.data.accept(StatementVisitor(), statement, context); if (!isFirstStatement)
context.logger.outputStream() << std::endl;
if (!formula) context.logger.outputStream() << formula << std::endl;
return;
if (!context.simplify) isFirstStatement = false;
};
const auto translateStatement =
[&context, &printFormula](const Clingo::AST::Statement &statement)
{
auto formulas = statement.data.accept(StatementVisitor(), statement, context);
for (auto &formula : formulas)
{ {
context.logger.outputStream() << formula.value() << std::endl; if (context.simplify)
return; simplify(formula);
}
simplify(formula.value()); printFormula(formula);
context.logger.outputStream() << formula.value() << std::endl; }
}; };
const auto logger = const auto logger =