From 2ac145b3bb6d2de3887ab08e0cf26423b5e6c5ee Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Wed, 25 Feb 2026 20:33:36 +0100
Subject: Changes to run, reworking meta reporting for easier estimation of
 runtime parameters

---
 examples/meta/meta.cpp | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 examples/meta/meta.cpp

(limited to 'examples/meta/meta.cpp')

diff --git a/examples/meta/meta.cpp b/examples/meta/meta.cpp
new file mode 100644
index 0000000..5d3aaa4
--- /dev/null
+++ b/examples/meta/meta.cpp
@@ -0,0 +1,96 @@
+#include <kel/lbm/lbm.hpp>
+
+#include <iostream>
+
+namespace sch {
+using namespace saw::schema;
+
+using MetaArgsStruct = Struct<
+	Member<Float64, "dx">,
+	Member<Float64, "dt">,
+	Member<Float64, "kin_vis">,
+	Member<Float64, "char_vel">,
+	Member<Float64, "char_len">
+>;
+
+using MetaArgs = Args<
+	MetaArgsStruct,
+	Tuple<UInt64,UInt64>
+>;
+}
+
+template<
+
+saw::error_or<void> meta_main(int argc, char** argv){
+	using namespace kel::lbm;
+
+	std::string_view cfg_file_name = "config.json";
+	if(argc > 1){
+		cfg_file_name = argv[1];
+	}
+
+	saw::data<MetaArgs> args_dat;
+	{
+		saw::data<MetaArgs, saw::encode::Args> args_enc{argc,argv};
+		saw::codec<MetaArgs, saw::encode::Args> args_codec;
+
+		auto eov = args_codec.decode(args_enc,args_dat);
+		if(eov.is_error()){
+			return eov;
+	}
+
+	auto& args_str = args_dat.template get<"args">();
+	auto& args_pos = args_dat.template get<"positionals">();
+
+	converter<sch::Float64> conv{
+		{args_str.template get<"delta_x">()},
+		{args_str.template get<"delta_t">()}
+	};
+
+	switch(args_pos.get<0u>().get()){
+	case 1u:
+		{
+		}
+		break;
+	case 2u:
+		{
+			switch(args_pos.get<1u>().get()){
+			case 5u:
+				break;
+			case 9u:
+				break;
+			default:
+				return saw::make_error<saw::err::critical>("Second positional needs to be a valid velocity set");
+			}
+		}
+		break;
+	case 3u:
+		{
+
+		}
+		break;
+	default:
+		return saw::make_error<saw::err::critical>("First positional needs to be Dimension 1,2 or 3");
+	}
+	print_lbm_meta<sch::Float64,sch::Descriptor<2,9>>(conv, {args_str.template get<"kinematic_viscosity">()},{args_str.template get<"char_vel">()},{args_str.template get<"char_len">()});
+
+	return saw::make_void();
+}
+
+int main(int argc, char** argv){
+	auto eov = meta_main(argc,argv);
+	if(eov.is_error()){
+		auto& err = eov.get_error();
+
+		std::cerr<<"[Error]: "<<err.get_category();
+
+		auto err_msg = err.get_message();
+		if(not err_msg.empty()){
+			std::cerr<<" - "<<err_msg;
+		}
+
+		std::cerr<<std::endl;
+	}
+
+	return 0;
+}
-- 
cgit v1.2.3