1 files changed, 38 insertions, 0 deletions
diff --git a/src/ast.h b/src/ast.h
new file mode 100644
index 0000000..bd2e628
--- /dev/null
+++ b/src/ast.h
@@ -0,0 +1,38 @@
+#ifndef AST_H
+#define AST_H
+
+#include "lexer.h"
+
+typedef struct node_t *ast_t;
+struct ast_node {
+    enum {
+        NODE_SEXP,
+        NODE_SYMBOL,
+        NODE_LITERAL,
+    } type;
+
+    union {
+        struct sexp {
+            struct ast_node **children;
+            size_t nchildren;
+        } sexp;
+
+        char *symbol;
+
+        union {
+            enum {
+                NODE_LITERAL_NUM,
+                NODE_LITERAL_STR,
+            } type;
+
+            int number;
+            char *string;
+        } literal;
+    };
+};
+
+ast_t ast_create();
+void ast_destroy(ast_t ast);
+int ast_parse_lexer(ast_t ast, lexer_t lex);
+
+#endif