1 files changed, 42 insertions, 0 deletions
diff --git a/src/include/ast.h b/src/include/ast.h
new file mode 100644
index 0000000..f7be3d5
--- /dev/null
+++ b/src/include/ast.h
@@ -0,0 +1,42 @@
+#ifndef AST_H
+#define AST_H
+#include <stdbool.h>
+
+typedef struct AST_STRUCT {
+  enum {
+    /* complex types */
+    AST_PAIR,
+    AST_SYMBOL,
+    /* self evaluating types */
+    AST_STRING,
+    AST_BOOL,
+    AST_INT,
+    AST_FLOAT,
+    AST_FUNCTION,
+  } type;
+
+  /* For functions, the car will be a list of variables, and the cdr will be the
+   * expression */
+  struct AST_STRUCT *car;
+  struct AST_STRUCT *cdr;
+
+  char *string_value;
+  int int_value;
+  double float_value;
+  bool bool_value;
+} ast_t;
+
+ast_t *init_ast_string(char *value);
+
+ast_t *init_ast_int(int value);
+
+ast_t *init_ast_float(double value);
+
+ast_t *init_ast_pair(ast_t *car, ast_t *cdr);
+
+ast_t *init_ast_bool(bool value);
+
+ast_t *init_ast_symbol(char *value);
+
+ast_t *init_ast_function(ast_t *car, ast_t *cdr);
+#endif