Made iwa compile as an S++ library.

data/config/iwa_enums.yml

@@ -0,0 +1,12 @@
+# Data source for enums that are shared between CPP and GLSL
+vertex_input_semantic:
+  cpp_type_name: VertexAttributeSemantic
+  glsl_prefix: IWA_VAS_
+  entries:
+    CUSTOM: 0
+    POSITION: 1
+    NORMAL: 2
+    TANGENT: 3
+    BITANGENT: 4
+    TEXCOORDS: 5
+    COLOR: 6

data/jinja/iwa_enums.jinja

@@ -0,0 +1,26 @@
+
+{%- set enum_config = 'iwa_enums' | load_config -%}
+{% macro cpp_enum(name) -%}
+enum class {{ enum_config[name].cpp_type_name }}
+{
+{%- for key, value in enum_config[name].entries.items(): %}
+    {{ key }} = {{ value }},
+{%- endfor %}
+};
+
+inline mijin::Optional<{{ enum_config[name].cpp_type_name }}> {{ enum_config[name].cpp_type_name[0] | lower }}{{ enum_config[name].cpp_type_name[1:] }}FromString(std::string_view name)
+{
+    {%- for key in enum_config[name].entries.keys(): %}
+    if (name == "{{ key | lower }}") {
+        return {{ enum_config[name].cpp_type_name }}::{{ key }};
+    }
+    {%- endfor %}
+    return mijin::NULL_OPTIONAL;
+}
+
+{%- endmacro %}
+{% macro glsl_enum(name) -%}
+{%- for key, value in enum_config[name].entries.items(): -%}
+const int {{ enum_config[name].glsl_prefix }}{{ key }} = {{ value }};
+{% endfor -%}
+{%- endmacro %}