diff --git a/lang/ast/double.c b/lang/ast/double.c
new file mode 100644
index 0000000..dbffc33
--- /dev/null
+++ b/lang/ast/double.c
@@ -0,0 +1,14 @@
+#include "ctx.h"
+#include "node.h"
+
+static void print(struct ivy_ast_node *node)
+{
+	struct ivy_ast_double_node *v = (struct ivy_ast_double_node *)node;
+
+	printf("%s (%.2lf)\n", ivy_ast_node_type_to_string(node->n_type), v->n_value->t_double);
+}
+
+struct ast_node_type double_node_ops = {
+        .n_state_size = sizeof(struct parser_state),
+        .n_node_size = sizeof(struct ivy_ast_double_node),
+};
diff --git a/lang/ast/ident.c b/lang/ast/ident.c
new file mode 100644
index 0000000..1020252
--- /dev/null
+++ b/lang/ast/ident.c
@@ -0,0 +1,15 @@
+#include "ctx.h"
+#include "node.h"
+
+static void print(struct ivy_ast_node *node)
+{
+	struct ivy_ast_ident_node *ident = (struct ivy_ast_ident_node *)node;
+
+	printf("%s (%s)\n", ivy_ast_node_type_to_string(node->n_type), ident->n_content->t_str);
+}
+
+struct ast_node_type ident_node_ops = {
+	.n_print = print,
+        .n_state_size = sizeof(struct parser_state),
+        .n_node_size = sizeof(struct ivy_ast_ident_node),
+};
diff --git a/lang/ast/int.c b/lang/ast/int.c
new file mode 100644
index 0000000..2ea631c
--- /dev/null
+++ b/lang/ast/int.c
@@ -0,0 +1,15 @@
+#include "ctx.h"
+#include "node.h"
+
+static void print(struct ivy_ast_node *node)
+{
+	struct ivy_ast_int_node *v = (struct ivy_ast_int_node *)node;
+
+	printf("%s (%llu)\n", ivy_ast_node_type_to_string(node->n_type), v->n_value->t_int);
+}
+
+struct ast_node_type int_node_ops = {
+	.n_print = print,
+        .n_state_size = sizeof(struct parser_state),
+        .n_node_size = sizeof(struct ivy_ast_int_node),
+};
diff --git a/lang/ast/msg.c b/lang/ast/msg.c
new file mode 100644
index 0000000..e659fb8
--- /dev/null
+++ b/lang/ast/msg.c
@@ -0,0 +1,28 @@
+#include "ctx.h"
+#include "node.h"
+
+static void collect_children(
+	struct ivy_ast_node *node, struct ivy_ast_node_iterator *iterator)
+{
+	struct ivy_ast_msg_node *msg = (struct ivy_ast_msg_node *)node;
+
+	if (msg->n_recipient) {
+		ast_node_iterator_enqueue_node(iterator, node, msg->n_recipient);
+	}
+
+	if (msg->n_sel) {
+		ast_node_iterator_enqueue_node(iterator, node, msg->n_sel);
+	}
+
+	b_queue_iterator it = {0};
+	b_queue_foreach (&it, &msg->n_arg) {
+		struct ivy_ast_node *arg = b_unbox(struct ivy_ast_node, it.entry, n_entry);
+		ast_node_iterator_enqueue_node(iterator, node, arg);
+	}
+}
+
+struct ast_node_type msg_node_ops = {
+	.n_collect_children = collect_children,
+        .n_state_size = sizeof(struct parser_state),
+        .n_node_size = sizeof(struct ivy_ast_msg_node),
+};
diff --git a/lang/ast/node.c b/lang/ast/node.c
index 4866d42..e68dcbe 100644
--- a/lang/ast/node.c
+++ b/lang/ast/node.c
@@ -13,6 +13,12 @@ extern struct ast_node_type msgh_node_ops;
 extern struct ast_node_type selector_node_ops;
 extern struct ast_node_type expr_node_ops;
 extern struct ast_node_type block_node_ops;
+extern struct ast_node_type msg_node_ops;
+extern struct ast_node_type op_node_ops;
+extern struct ast_node_type ident_node_ops;
+extern struct ast_node_type int_node_ops;
+extern struct ast_node_type double_node_ops;
+extern struct ast_node_type string_node_ops;
 
 static const struct ast_node_type *node_ops[] = {
 	[IVY_AST_UNIT] = &unit_node_ops,
@@ -23,6 +29,12 @@ static const struct ast_node_type *node_ops[] = {
 	[IVY_AST_SELECTOR] = &selector_node_ops,
 	[IVY_AST_EXPR] = &expr_node_ops,
 	[IVY_AST_BLOCK] = &block_node_ops,
+	[IVY_AST_MSG] = &msg_node_ops,
+	[IVY_AST_OP] = &op_node_ops,
+	[IVY_AST_IDENT] = &ident_node_ops,
+	[IVY_AST_INT] = &int_node_ops,
+	[IVY_AST_DOUBLE] = &double_node_ops,
+	[IVY_AST_STRING] = &string_node_ops,
 };
 static const size_t nr_node_ops = sizeof node_ops / sizeof node_ops[0];
 
diff --git a/lang/ast/op.c b/lang/ast/op.c
new file mode 100644
index 0000000..ea246bc
--- /dev/null
+++ b/lang/ast/op.c
@@ -0,0 +1,32 @@
+#include "ctx.h"
+#include "node.h"
+#include "iterate.h"
+#include <stdio.h>
+
+static void print(struct ivy_ast_node *node)
+{
+	struct ivy_ast_op_node *op = (struct ivy_ast_op_node *)node;
+
+	printf("%s (%s)\n", ivy_ast_node_type_to_string(node->n_type), ivy_operator_id_to_string(op->n_op->op_id));
+}
+
+static void collect_children(
+	struct ivy_ast_node *node, struct ivy_ast_node_iterator *iterator)
+{
+	struct ivy_ast_op_node *op = (struct ivy_ast_op_node *)node;
+
+	if (op->n_left) {
+		ast_node_iterator_enqueue_node(iterator, node, op->n_left);
+	}
+
+	if (op->n_right) {
+		ast_node_iterator_enqueue_node(iterator, node, op->n_right);
+	}
+}
+
+struct ast_node_type op_node_ops = {
+	.n_print = print,
+	.n_collect_children = collect_children,
+        .n_state_size = sizeof(struct parser_state),
+        .n_node_size = sizeof(struct ivy_ast_op_node),
+};
diff --git a/lang/ast/string.c b/lang/ast/string.c
new file mode 100644
index 0000000..349103f
--- /dev/null
+++ b/lang/ast/string.c
@@ -0,0 +1,7 @@
+#include "ctx.h"
+#include "node.h"
+
+struct ast_node_type string_node_ops = {
+        .n_state_size = sizeof(struct parser_state),
+        .n_node_size = sizeof(struct ivy_ast_string_node),
+};