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Code Issues 15 Releases 21 Activity

Fixed issue with multi-layer variable stacks.

This commit is contained in:
Patrick Lühne 2017-05-30 18:09:33 +02:00
parent 7aad8380d1
commit 664a57ec68
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GPG Key ID: 05F3611E97A70ABF
3 changed files with 23 additions and 4 deletions
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7
include/anthem/Body.h
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@ -62,11 +62,12 @@ struct BodyTermTranslateVisitor
std::vector<std::unique_ptr<ast::VariableDeclaration>> parameters;
parameters.reserve(function.arguments.size());
variableStack.push(&parameters);
for (size_t i = 0; i < function.arguments.size(); i++)
parameters.emplace_back(std::make_unique<ast::VariableDeclaration>(ast::VariableDeclaration::Type::Body));
// TODO: implement pushing with scoped guards to avoid bugs
variableStack.push(&parameters);
ast::And conjunction;
for (size_t i = 0; i < function.arguments.size(); i++)
@ -75,6 +76,8 @@ struct BodyTermTranslateVisitor
conjunction.arguments.emplace_back(ast::Formula::make<ast::In>(ast::Variable(parameters[i].get()), translate(argument, context, ruleContext, variableStack)));
}
variableStack.pop();
ast::Predicate predicate(std::string(function.name));
predicate.arguments.reserve(function.arguments.size());

4
src/anthem/ASTUtils.cpp
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@ -29,7 +29,7 @@ void VariableStack::pop()
std::experimental::optional<ast::VariableDeclaration *> VariableStack::findUserVariableDeclaration(const char *variableName) const
{
const auto variableNameMatches =
const auto variableDeclarationMatches =
[&variableName](const auto &variableDeclaration)
{
return variableDeclaration->type == VariableDeclaration::Type::UserDefined
@ -39,7 +39,7 @@ std::experimental::optional<ast::VariableDeclaration *> VariableStack::findUserV
for (auto i = m_layers.rbegin(); i != m_layers.rend(); i++)
{
auto &layer = **i;
const auto matchingVariableDeclaration = std::find_if(layer.begin(), layer.end(), variableNameMatches);
const auto matchingVariableDeclaration = std::find_if(layer.begin(), layer.end(), variableDeclarationMatches);
if (matchingVariableDeclaration != layer.end())
return matchingVariableDeclaration->get();

16
tests/TestTranslation.cpp
View File

@ -181,6 +181,22 @@ TEST_CASE("[translation] Rules are translated correctly", "[translation]")
CHECK(output.str() == "((V1 in U1 and V2 in 1..10 and exists X1, X2 (X1 in U1 and X2 in 6..12 and q(X1, X2))) -> p(V1, V2))\n");
}
SECTION("intervals with variable")
{
input << ":- q(N), 1 = 1..N.";
anthem::translate("input", input, context);
CHECK(output.str() == "((exists X1 (X1 in U1 and q(X1)) and exists X2, X3 (X2 in 1 and X3 in 1..U1 and X2 = X3)) -> #false)\n");
}
SECTION("intervals with two variables")
{
input << ":- q(M, N), M = 1..N.";
anthem::translate("input", input, context);
CHECK(output.str() == "((exists X1, X2 (X1 in U1 and X2 in U2 and q(X1, X2)) and exists X3, X4 (X3 in U1 and X4 in 1..U2 and X3 = X4)) -> #false)\n");
}
SECTION("comparisons")
{
input << "p(M, N, O, P) :- M < N, P != O.";