diff --git a/ast-generator/src/build_fn/mod.rs b/ast-generator/src/build_fn/mod.rs
index 50fc834..2566732 100644
--- a/ast-generator/src/build_fn/mod.rs
+++ b/ast-generator/src/build_fn/mod.rs
@@ -1,8 +1,9 @@
-pub mod enum_build_fn;
 pub mod leaf_enum_build_fn;
 pub mod leaf_struct_build_fn;
+mod node_production_build_fn;
 pub mod polymorphic_build_build_fn;
 pub mod polymorphic_build_fn;
 pub mod polymorphic_enum_build_fn;
 pub mod production_build_fn;
 pub mod struct_build_fn;
+pub mod tree_enum_build_fn;
diff --git a/ast-generator/src/build_fn/node_production_build_fn.rs b/ast-generator/src/build_fn/node_production_build_fn.rs
new file mode 100644
index 0000000..85b027f
--- /dev/null
+++ b/ast-generator/src/build_fn/node_production_build_fn.rs
@@ -0,0 +1,18 @@
+use crate::deserialize::util::make_build_pair;
+use crate::spec::node_production_spec::NodeProductionBuildSpec;
+use proc_macro2::TokenStream;
+use quote::{format_ident, quote};
+
+pub fn make_node_production_build_fn(spec: &NodeProductionBuildSpec) -> TokenStream {
+    let build_fn_ident = format_ident!("{}", spec.with());
+    let pair_ident = format_ident!("{}", make_build_pair(spec.name()));
+    let return_type_ident = format_ident!("{}", spec.kind());
+    let inner_build_fn_ident = format_ident!("{}", spec.with());
+    
+    quote! {
+        fn #build_fn_ident(#pair_ident: Pair<Rule>) -> #return_type_ident {
+            let inner_pair = #pair_ident.into_inner().next().unwrap();
+            #inner_build_fn_ident(inner_pair)
+        }
+    }
+}
\ No newline at end of file