diff --git a/lib/pddlparse/include/pddlparse/ASTOutput.h b/lib/pddlparse/include/pddlparse/ASTOutput.h
new file mode 100644
index 0000000..f880ba9
--- /dev/null
+++ b/lib/pddlparse/include/pddlparse/ASTOutput.h
@@ -0,0 +1,728 @@
+#ifndef __PDDL_PARSE__AST_OUTPUT_H
+#define __PDDL_PARSE__AST_OUTPUT_H
+
+#include <colorlog/ColorStream.h>
+#include <colorlog/Formatting.h>
+
+#include <pddlparse/AST.h>
+#include <pddlparse/detail/parsing/Requirement.h>
+
+namespace pddl
+{
+namespace ast
+{
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// Output
+//
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+namespace detail
+{
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+struct PrintContext
+{
+	size_t indentationLevel{0};
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+struct Identifier
+{
+	Identifier(const char *content)
+	:	content{content}
+	{
+	}
+
+	Identifier(const std::string &content)
+	:	content{content.c_str()}
+	{
+	}
+
+	const char *content;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &operator<<(colorlog::ColorStream &stream, const Identifier &identifier)
+{
+	return (stream
+		<< colorlog::Format({colorlog::Color::Green, colorlog::FontWeight::Normal})
+		<< identifier.content << colorlog::ResetFormat());
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+struct Type
+{
+	Type(const char *name)
+	:	name{name}
+	{
+	}
+
+	Type(const std::string &name)
+	:	name{name.c_str()}
+	{
+	}
+
+	const char *name;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &operator<<(colorlog::ColorStream &stream, const Type &type)
+{
+	return (stream
+		<< colorlog::Format({colorlog::Color::Red, colorlog::FontWeight::Normal})
+		<< type.name << colorlog::ResetFormat());
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+struct Constant
+{
+	Constant(const char *name)
+	:	name{name}
+	{
+	}
+
+	Constant(const std::string &name)
+	:	name{name.c_str()}
+	{
+	}
+
+	const char *name;
+};
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &operator<<(colorlog::ColorStream &stream, const Constant &constant)
+{
+	return (stream
+		<< colorlog::Format({colorlog::Color::Yellow, colorlog::FontWeight::Normal})
+		<< constant.name << colorlog::ResetFormat());
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+colorlog::ColorStream &printIndentedNewline(colorlog::ColorStream &stream, detail::PrintContext &printContext)
+{
+	stream << std::endl;
+
+	for (size_t i = 0; i < printContext.indentationLevel; i++)
+		stream << "\t";
+
+	return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Forward declarations
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Constant &constant, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const ConstantDeclaration &constantDeclaration, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const PrimitiveType &primitiveType, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const PrimitiveTypeDeclaration &primitiveTypeDeclaration, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Variable &variable, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const VariableDeclaration &variableDeclaration, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Predicate &predicate, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const PredicateDeclaration &predicateDeclaration, detail::PrintContext &printContext);
+
+template<class Derived, class ArgumentLeft, class ArgumentRight = ArgumentLeft>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Binary<Derived, ArgumentLeft, ArgumentRight> &binary, detail::PrintContext &printContext);
+template<class Derived, class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const NAry<Derived, Argument> &nAry, detail::PrintContext &printContext);
+template<class Derived, class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Quantified<Derived, Argument> &quantified, detail::PrintContext &printContext);
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const At<Argument> &at, detail::PrintContext &printContext);
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Not<Argument> &not_, detail::PrintContext &printContext);
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Action &action, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Domain &domain, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const InitialState &initialState, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Problem &problem, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Requirement &requirement, detail::PrintContext &printContext);
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Description &description, detail::PrintContext &printContext);
+
+template<class ValueType>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const std::unique_ptr<ValueType> &variant, detail::PrintContext &printContext);
+template<class ValueType>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const std::vector<ValueType> &variant, detail::PrintContext &printContext);
+template<class Variant>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Variant &variant, detail::PrintContext &printContext);
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Primitives
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Constant &constant, detail::PrintContext &)
+{
+	return stream << detail::Constant(constant.declaration->name);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const ConstantDeclaration &constantDeclaration, detail::PrintContext &printContext)
+{
+	stream << detail::Constant(constantDeclaration.name);
+
+	if (constantDeclaration.type)
+	{
+		stream << " - ";
+		print(stream, constantDeclaration.type.value(), printContext);
+	}
+
+	return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const PrimitiveType &primitiveType, detail::PrintContext &)
+{
+	return stream << detail::Type(primitiveType.declaration->name);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const PrimitiveTypeDeclaration &primitiveTypeDeclaration, detail::PrintContext &printContext)
+{
+	if (primitiveTypeDeclaration.parentTypes.empty())
+		return (stream << detail::Type(primitiveTypeDeclaration.name));
+
+	if (!primitiveTypeDeclaration.parentTypes.empty())
+		for (const auto &parentType : primitiveTypeDeclaration.parentTypes)
+		{
+			if (&parentType != &primitiveTypeDeclaration.parentTypes.front())
+				printIndentedNewline(stream, printContext);
+
+			stream << detail::Type(primitiveTypeDeclaration.name) << " - " << detail::Type(parentType->declaration->name);
+		}
+
+	return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Unsupported &unsupported, detail::PrintContext &)
+{
+	const auto unsupportedName = "<unsupported " + unsupported.type + ">";
+
+	return (stream << colorlog::Reserved(unsupportedName.c_str()));
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Variable &variable, detail::PrintContext &)
+{
+	const auto variableName = "?" + variable.declaration->name;
+
+	return (stream << colorlog::Variable(variableName.c_str()));
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const VariableDeclaration &variableDeclaration, detail::PrintContext &printContext)
+{
+	const auto variableName = "?" + variableDeclaration.name;
+
+	stream << colorlog::Variable(variableName.c_str());
+
+	if (variableDeclaration.type)
+	{
+		stream << " - ";
+		print(stream, *variableDeclaration.type, printContext);
+	}
+
+	return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Compounds
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Predicate &predicate, detail::PrintContext &printContext)
+{
+	stream << "(" << detail::Identifier(predicate.declaration->name) << " ";
+
+	for (const auto &argument : predicate.arguments)
+	{
+		if (&argument != &predicate.arguments.front())
+			stream << " ";
+
+		print(stream, argument, printContext);
+	}
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const PredicateDeclaration &predicateDeclaration, detail::PrintContext &printContext)
+{
+	stream << "(" << detail::Identifier(predicateDeclaration.name);
+
+	for (const auto &parameter : predicateDeclaration.parameters)
+	{
+		stream << " ";
+		print(stream, *parameter, printContext);
+	}
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Expressions: Base Classes
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Derived, class ArgumentLeft, class ArgumentRight>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Binary<Derived, ArgumentLeft, ArgumentRight> &binary, detail::PrintContext &printContext)
+{
+	stream << "(" << colorlog::Keyword(Derived::Identifier);
+
+	printContext.indentationLevel++;
+
+	printIndentedNewline(stream, printContext);
+	print(stream, binary.argumentLeft, printContext);
+	printIndentedNewline(stream, printContext);
+	print(stream, binary.argumentRight, printContext);
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Derived, class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const NAry<Derived, Argument> &nAry, detail::PrintContext &printContext)
+{
+	stream << "(" << colorlog::Keyword(Derived::Identifier);
+
+	printContext.indentationLevel++;
+
+	for (const auto &argument : nAry.arguments)
+	{
+		printIndentedNewline(stream, printContext);
+		print(stream, argument, printContext);
+	}
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Derived, class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Quantified<Derived, Argument> &quantified, detail::PrintContext &printContext)
+{
+	stream << "(" << colorlog::Keyword(Derived::Identifier);
+
+	printContext.indentationLevel++;
+
+	printIndentedNewline(stream, printContext);
+	print(stream, quantified.parameters, printContext);
+	printIndentedNewline(stream, printContext);
+	print(stream, quantified.argument, printContext);
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Expressions
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const And<Argument> &and_, detail::PrintContext &printContext)
+{
+	return print(stream, static_cast<const NAry<And<Argument>, Argument> &>(and_), printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const At<Argument> &at, detail::PrintContext &printContext)
+{
+	stream << "(" << colorlog::Keyword("at");
+
+	printContext.indentationLevel++;
+
+	printIndentedNewline(stream, printContext);
+	stream << colorlog::Number<decltype(at.timePoint)>(at.timePoint);
+	printIndentedNewline(stream, printContext);
+	print(stream, at.argument, printContext);
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Either<Argument> &either, detail::PrintContext &printContext)
+{
+	return print(stream, static_cast<const NAry<Either<Argument>, Argument> &>(either), printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Exists<Argument> &exists, detail::PrintContext &printContext)
+{
+	return print(stream, static_cast<const Quantified<Exists<Argument>, Argument> &>(exists), printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const ForAll<Argument> &forAll, detail::PrintContext &printContext)
+{
+	return print(stream, static_cast<const Quantified<ForAll<Argument>, Argument> &>(forAll), printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Imply<Argument> &imply, detail::PrintContext &printContext)
+{
+	return print(stream, static_cast<const Binary<Imply<Argument>, Argument> &>(imply), printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Not<Argument> &not_, detail::PrintContext &printContext)
+{
+	stream << "(" << colorlog::Keyword("not");
+
+	printContext.indentationLevel++;
+
+	printIndentedNewline(stream, printContext);
+	print(stream, not_.argument, printContext);
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Argument>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Or<Argument> &or_, detail::PrintContext &printContext)
+{
+	return print(stream, static_cast<const NAry<Or<Argument>, Argument> &>(or_), printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class ArgumentLeft, class ArgumentRight>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const When<ArgumentLeft, ArgumentRight> &when, detail::PrintContext &printContext)
+{
+	return print(stream, static_cast<const Binary<When<ArgumentLeft, ArgumentRight>, ArgumentLeft, ArgumentRight> &>(when), printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// PDDL Structure
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Action &action, detail::PrintContext &printContext)
+{
+	stream << "(" << colorlog::Keyword(":action") << " " << detail::Identifier(action.name);
+
+	printContext.indentationLevel++;
+
+	if (!action.parameters.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":parameters");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, action.parameters, printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	if (action.precondition)
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":precondition");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, action.precondition.value(), printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	if (action.effect)
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":effect");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, action.effect.value(), printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Domain &domain, detail::PrintContext &printContext)
+{
+	stream << "(" << colorlog::Keyword("define") << " (" << colorlog::Keyword("domain") << " " << detail::Identifier(domain.name) << ")";
+
+	printContext.indentationLevel++;
+
+	if (!domain.requirements.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":requirements");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, domain.requirements, printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	if (!domain.types.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":types");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, domain.types, printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	if (!domain.constants.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":constants");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, domain.constants, printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	if (!domain.predicates.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":predicates");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, domain.predicates, printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	if (!domain.actions.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		print(stream, domain.actions, printContext);
+	}
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const InitialState &initialState, detail::PrintContext &printContext)
+{
+	assert(!initialState.facts.empty());
+
+	stream << "(" << colorlog::Keyword(":init");
+
+	printContext.indentationLevel++;
+
+	printIndentedNewline(stream, printContext);
+	print(stream, initialState.facts, printContext);
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Problem &problem, detail::PrintContext &printContext)
+{
+	stream << "(" << colorlog::Keyword("define") << " (" << colorlog::Keyword("problem") << " " << detail::Identifier(problem.name) << ")";
+
+	printContext.indentationLevel++;
+
+	printIndentedNewline(stream, printContext);
+	stream << "(" << colorlog::Keyword(":domain") << " " << detail::Identifier(problem.domain->name) << ")";
+
+	if (!problem.requirements.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":requirements");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, problem.requirements, printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	if (!problem.objects.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":objects");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, problem.objects, printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	if (!problem.initialState.facts.empty())
+	{
+		printIndentedNewline(stream, printContext);
+		print(stream, problem.initialState, printContext);
+	}
+
+	if (problem.goal)
+	{
+		printIndentedNewline(stream, printContext);
+		stream << "(" << colorlog::Keyword(":goal");
+
+		printContext.indentationLevel++;
+
+		printIndentedNewline(stream, printContext);
+		print(stream, problem.goal.value(), printContext);
+		stream << ")";
+
+		printContext.indentationLevel--;
+	}
+
+	printContext.indentationLevel--;
+
+	return (stream << ")");
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Requirement &requirement, detail::PrintContext &)
+{
+	auto requirementName = std::string(":") + pddl::detail::toString(requirement);
+
+	return (stream << detail::Identifier(requirementName.c_str()));
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Description &description, detail::PrintContext &printContext)
+{
+	print(stream, *description.domain, printContext);
+	stream << std::endl;
+
+	if (description.problem)
+	{
+		stream << std::endl;
+		print(stream, *description.problem.value(), printContext);
+		stream << std::endl;
+	}
+
+	return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+inline colorlog::ColorStream &operator<<(colorlog::ColorStream &stream, const Description &description)
+{
+	detail::PrintContext printContext;
+
+	return print(stream, description, printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+// Variants
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class ValueType>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const std::unique_ptr<ValueType> &uniquePointer, detail::PrintContext &printContext)
+{
+	assert(uniquePointer);
+	return print(stream, *uniquePointer, printContext);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class ValueType>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const std::vector<ValueType> &vector, detail::PrintContext &printContext)
+{
+	for (const auto &element : vector)
+	{
+		if (&element != &vector.front())
+			printIndentedNewline(stream, printContext);
+
+		print(stream, element, printContext);
+	}
+
+	return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+template<class Variant>
+inline colorlog::ColorStream &print(colorlog::ColorStream &stream, const Variant &variant, detail::PrintContext &printContext)
+{
+	variant.match([&](const auto &x){return print(stream, x, printContext);});
+
+	return stream;
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+}
+}
+
+#endif
diff --git a/lib/pddlparse/src/CMakeLists.txt b/lib/pddlparse/src/CMakeLists.txt
index 58421ff..0eb1160 100644
--- a/lib/pddlparse/src/CMakeLists.txt
+++ b/lib/pddlparse/src/CMakeLists.txt
@@ -11,6 +11,7 @@ file(GLOB detail_parsing_headers "../include/pddlparse/detail/parsing/*.h")
 
 set(includes
 	${PROJECT_SOURCE_DIR}/include
+	${PROJECT_SOURCE_DIR}/../../lib/colorlog/include
 	${PROJECT_SOURCE_DIR}/../../lib/tokenize/include
 	${PROJECT_SOURCE_DIR}/../../lib/variant/include
 )