3 files changed, 34 insertions, 24 deletions

diff --git a/src/openvic-simulation/dataloader/Dataloader.cpp b/src/openvic-simulation/dataloader/Dataloader.cpp
index 475cdd1..cfc944d 100644
--- a/src/openvic-simulation/dataloader/Dataloader.cpp
+++ b/src/openvic-simulation/dataloader/Dataloader.cpp
@@ -48,7 +48,7 @@ static constexpr bool path_equals(std::string_view lhs, std::string_view rhs) {
 template<typename T>
 concept is_filename = std::same_as<T, std::filesystem::path> || std::convertible_to<T, std::string_view>;
 
-bool filename_equals(const is_filename auto& lhs, const is_filename auto& rhs) {
+static bool filename_equals(const is_filename auto& lhs, const is_filename auto& rhs) {
 	auto left = [&lhs] {
 		if constexpr (std::same_as<std::decay_t<decltype(lhs)>, std::filesystem::path>)
 			return lhs.filename().string();
diff --git a/src/openvic-simulation/dataloader/NodeTools.cpp b/src/openvic-simulation/dataloader/NodeTools.cpp
index 85bc572..c99a2f0 100644
--- a/src/openvic-simulation/dataloader/NodeTools.cpp
+++ b/src/openvic-simulation/dataloader/NodeTools.cpp
@@ -103,18 +103,20 @@ node_callback_t NodeTools::expect_uint64(callback_t<uint64_t> callback) {
 	);
 }
 
-node_callback_t NodeTools::expect_fixed_point(callback_t<fixed_point_t> callback) {
-	return expect_identifier(
-		[callback](std::string_view identifier) -> bool {
-			bool successful = false;
-			const fixed_point_t val = fixed_point_t::parse(identifier.data(), identifier.length(), &successful);
-			if (successful) {
-				return callback(val);
-			}
-			Logger::error("Invalid fixed point identifier text: ", identifier);
-			return false;
+callback_t<std::string_view> NodeTools::expect_fixed_point_str(callback_t<fixed_point_t> callback) {
+	return [callback](std::string_view identifier) -> bool {
+		bool successful = false;
+		const fixed_point_t val = fixed_point_t::parse(identifier.data(), identifier.length(), &successful);
+		if (successful) {
+			return callback(val);
 		}
-	);
+		Logger::error("Invalid fixed point identifier text: ", identifier);
+		return false;
+	};
+}
+
+node_callback_t NodeTools::expect_fixed_point(callback_t<fixed_point_t> callback) {
+	return expect_identifier(expect_fixed_point_str(callback));
 }
 
 node_callback_t NodeTools::expect_colour(callback_t<colour_t> callback) {
@@ -142,18 +144,20 @@ node_callback_t NodeTools::expect_colour(callback_t<colour_t> callback) {
 	};
 }
 
-node_callback_t NodeTools::expect_date(callback_t<Date> callback) {
-	return expect_identifier(
-		[callback](std::string_view identifier) -> bool {
-			bool successful = false;
-			const Date date = Date::from_string(identifier, &successful);
-			if (successful) {
-				return callback(date);
-			}
-			Logger::error("Invalid date identifier text: ", identifier);
-			return false;
+callback_t<std::string_view> NodeTools::expect_date_str(callback_t<Date> callback) {
+	return [callback](std::string_view identifier) -> bool {
+		bool successful = false;
+		const Date date = Date::from_string(identifier, &successful);
+		if (successful) {
+			return callback(date);
 		}
-	);
+		Logger::error("Invalid date identifier text: ", identifier);
+		return false;
+	};
+}
+
+node_callback_t NodeTools::expect_date(callback_t<Date> callback) {
+	return expect_identifier(expect_date_str(callback));
 }
 
 node_callback_t NodeTools::expect_years(callback_t<Timespan> callback) {
diff --git a/src/openvic-simulation/dataloader/NodeTools.hpp b/src/openvic-simulation/dataloader/NodeTools.hpp
index f06a85f..66b614a 100644
--- a/src/openvic-simulation/dataloader/NodeTools.hpp
+++ b/src/openvic-simulation/dataloader/NodeTools.hpp
@@ -4,6 +4,7 @@
 #include <cstdint>
 #include <functional>
 #include <map>
+#include <set>
 #include <type_traits>
 
 #include <openvic-dataloader/v2script/AbstractSyntaxTree.hpp>
@@ -16,10 +17,13 @@ namespace OpenVic {
 	namespace ast = ovdl::v2script::ast;
 
 	/* Template for map from strings to Ts, in which string_views can be
-	 * searched for without needing to be copied into a string, */
+	 * searched for without needing to be copied into a string */
 	template<typename T>
 	using string_map_t = std::map<std::string, T, std::less<void>>;
 
+	/* String set type supporting heterogeneous key lookup */
+	using string_set_t = std::set<std::string, std::less<void>>;
+
 	namespace NodeTools {
 
 		template<typename Fn, typename Return = void, typename ...Args>
@@ -93,9 +97,11 @@ namespace OpenVic {
 			});
 		}
 
+		callback_t<std::string_view> expect_fixed_point_str(callback_t<fixed_point_t> callback);
 		node_callback_t expect_fixed_point(callback_t<fixed_point_t> callback);
 		node_callback_t expect_colour(callback_t<colour_t> callback);
 
+		callback_t<std::string_view> expect_date_str(callback_t<Date> callback);
 		node_callback_t expect_date(callback_t<Date> callback);
 		node_callback_t expect_years(callback_t<Timespan> callback);
 		node_callback_t expect_months(callback_t<Timespan> callback);