4 files changed, 240 insertions, 0 deletions
diff --git a/examples/meta/.nix/derivation.nix b/examples/meta/.nix/derivation.nix
new file mode 100644
index 0000000..26706e6
--- /dev/null
+++ b/examples/meta/.nix/derivation.nix
@@ -0,0 +1,33 @@
+{ lib
+, stdenv
+, scons
+, clang-tools
+, forstio
+, pname
+, version
+, kel
+}:
+
+stdenv.mkDerivation {
+	pname = pname + "-examples-" + "meta_2d";
+	inherit version;
+  src = ./..;
+
+  nativeBuildInputs = [
+    scons
+    clang-tools
+  ];
+
+  buildInputs = [
+    forstio.core
+    forstio.async
+    forstio.codec
+    forstio.codec-unit
+		forstio.codec-json
+		kel.lbm.core
+  ];
+
+	preferLocalBuild = true;
+
+  outputs = [ "out" "dev" ];
+}
diff --git a/examples/meta/SConscript b/examples/meta/SConscript
new file mode 100644
index 0000000..066a741
--- /dev/null
+++ b/examples/meta/SConscript
@@ -0,0 +1,32 @@
+#!/bin/false
+
+import os
+import os.path
+import glob
+
+
+Import('env')
+
+dir_path = Dir('.').abspath
+
+# Environment for base library
+examples_env = env.Clone();
+
+examples_env.sources = sorted(glob.glob(dir_path + "/*.cpp"))
+examples_env.headers = sorted(glob.glob(dir_path + "/*.hpp"))
+
+env.sources += examples_env.sources;
+env.headers += examples_env.headers;
+
+# Cavity2D
+examples_objects = [];
+examples_env.add_source_files(examples_objects, ['meta.cpp'], shared=False);
+examples_env.meta_2d = examples_env.Program('#bin/meta', [examples_objects]);
+
+# Set Alias
+env.examples = [
+	examples_env.meta_2d
+];
+env.Alias('examples', env.examples);
+env.targets += ['examples'];
+env.Install('$prefix/bin/', env.examples);
diff --git a/examples/meta/SConstruct b/examples/meta/SConstruct
new file mode 100644
index 0000000..a7201cb
--- /dev/null
+++ b/examples/meta/SConstruct
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+
+import sys
+import os
+import os.path
+import glob
+import re
+
+
+if sys.version_info < (3,):
+    def isbasestring(s):
+        return isinstance(s,basestring)
+else:
+    def isbasestring(s):
+        return isinstance(s, (str,bytes))
+
+def add_kel_source_files(self, sources, filetype, lib_env=None, shared=False, target_post=""):
+
+    if isbasestring(filetype):
+        dir_path = self.Dir('.').abspath
+        filetype = sorted(glob.glob(dir_path+"/"+filetype))
+
+    for path in filetype:
+        target_name = re.sub( r'(.*?)(\.cpp|\.c\+\+)', r'\1' + target_post, path )
+        if shared:
+            target_name+='.os'
+            sources.append( self.SharedObject( target=target_name, source=path ) )
+        else:
+            target_name+='.o'
+            sources.append( self.StaticObject( target=target_name, source=path ) )
+    pass
+
+def isAbsolutePath(key, dirname, env):
+	assert os.path.isabs(dirname), "%r must have absolute path syntax" % (key,)
+
+env_vars = Variables(
+	args=ARGUMENTS
+)
+
+env_vars.Add('prefix',
+	help='Installation target location of build results and headers',
+	default='/usr/local/',
+	validator=isAbsolutePath
+)
+
+env_vars.Add('build_examples',
+	help='If examples should be built',
+	default="true"
+)
+
+env=Environment(ENV=os.environ, variables=env_vars, CPPPATH=[],
+    CPPDEFINES=['SAW_UNIX'],
+    CXXFLAGS=[
+        '-std=c++20',
+        '-g',
+        '-Wall',
+        '-Wextra'
+    ],
+    LIBS=[
+        'forstio-core'
+    ]
+);
+env.__class__.add_source_files = add_kel_source_files
+env.Tool('compilation_db');
+env.cdb = env.CompilationDatabase('compile_commands.json');
+
+env.objects = [];
+env.sources = [];
+env.headers = [];
+env.targets = [];
+
+Export('env')
+SConscript('SConscript')
+
+env.Alias('cdb', env.cdb);
+env.Alias('all', [env.targets]);
+env.Default('all');
+
+env.Alias('install', '$prefix')
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;
+}