1 files changed, 42 insertions, 0 deletions
diff --git a/prism/node.h b/prism/node.h
new file mode 100644
index 0000000000..1b546f086f
--- /dev/null
+++ b/prism/node.h
@@ -0,0 +1,42 @@
+#ifndef YARP_NODE_H
+#define YARP_NODE_H
+
+#include "yarp/defines.h"
+#include "yarp/parser.h"
+
+// Append a new node onto the end of the node list.
+void yp_node_list_append(yp_node_list_t *list, yp_node_t *node);
+
+// Clear the node but preserves the location.
+void yp_node_clear(yp_node_t *node);
+
+// Deallocate a node and all of its children.
+YP_EXPORTED_FUNCTION void yp_node_destroy(yp_parser_t *parser, struct yp_node *node);
+
+// This struct stores the information gathered by the yp_node_memsize function.
+// It contains both the memory footprint and additionally metadata about the
+// shape of the tree.
+typedef struct {
+    size_t memsize;
+    size_t node_count;
+} yp_memsize_t;
+
+// Calculates the memory footprint of a given node.
+YP_EXPORTED_FUNCTION void yp_node_memsize(yp_node_t *node, yp_memsize_t *memsize);
+
+// Returns a string representation of the given node type.
+YP_EXPORTED_FUNCTION const char * yp_node_type_to_str(yp_node_type_t node_type);
+
+#define YP_EMPTY_NODE_LIST ((yp_node_list_t) { .nodes = NULL, .size = 0, .capacity = 0 })
+
+#endif // YARP_NODE_H
+
+// ScopeNodes are helper nodes, and will never
+// be part of the AST. We manually declare them
+// here to avoid generating them
+typedef struct yp_scope_node {
+    yp_node_t base;
+    struct yp_parameters_node *parameters;
+    yp_node_t *body;
+    yp_constant_id_list_t locals;
+} yp_scope_node_t;