Started implementing clean, separate PDDL syntax tree and parser.

lib/pddlparse/src/CMakeLists.txt

@@ -0,0 +1,28 @@
+set(target pddlparse)
+
+file(GLOB core_sources "pddlparse/*.cpp")
+file(GLOB core_headers "../include/pddlparse/*.h")
+
+file(GLOB detail_sources "pddlparse/detail/*.cpp")
+file(GLOB detail_headers "../include/pddlparse/detail/*.h")
+
+set(includes
+	${PROJECT_SOURCE_DIR}/include
+	${PROJECT_SOURCE_DIR}/../../lib/parsebase/include
+)
+
+set(sources
+	${core_sources}
+	${core_headers}
+
+	${detail_sources}
+	${detail_headers}
+)
+
+set(libraries
+	parsebase
+)
+
+add_library(${target} ${sources})
+target_include_directories(${target} PRIVATE ${includes})
+target_link_libraries(${target} ${libraries})

lib/pddlparse/src/pddlparse/detail/VariableStack.cpp

@@ -0,0 +1,31 @@
+#include <pddlparse/detail/VariableStack.h>
+
+#include <pddlparse/AST.h>
+
+namespace pddl
+{
+namespace detail
+{
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+//
+// VariableStack
+//
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+void VariableStack::push(ast::VariableDeclarations *variables)
+{
+	m_variableStack.push_back(variables);
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+void VariableStack::pop()
+{
+	m_variableStack.pop_back();
+}
+
+////////////////////////////////////////////////////////////////////////////////////////////////////
+
+}
+}