1 files changed, 39 insertions, 0 deletions
diff --git a/ast.h b/ast.h
new file mode 100644
index 0000000..84a3341
--- /dev/null
+++ b/ast.h
@@ -0,0 +1,39 @@
+#ifndef _ast_h
+#define _ast_h
+
+#include <stdlib.h>
+#include <stddef.h>
+
+typedef enum {
+	AST_NUM,
+	AST_LIST,
+} AstTy;
+
+struct _astnode;
+typedef struct _astnode AstNode;
+
+typedef struct {
+	size_t len;
+	size_t cap;
+	AstNode *vals;
+} AstVec;
+
+struct _astnode {
+	AstTy ty;
+	union {
+		int num;
+		AstVec list;
+	} as;
+};
+
+
+AstVec astvec_new();
+void astvec_append(AstVec *v, AstNode val);
+
+AstNode astnode_new_num(int n);
+AstNode astnode_new_list();
+
+
+
+
+#endif