From 967be9e750221ab2ab783f95df79bb26d290a45e Mon Sep 17 00:00:00 2001
From: Martial Simon <msimon_fr@hotmail.com>
Date: Mon, 15 Sep 2025 01:07:58 +0200
Subject: add: added projects

---
 21sh/ll-expr/src/ast/ast.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 21sh/ll-expr/src/ast/ast.c

(limited to '21sh/ll-expr/src/ast/ast.c')

diff --git a/21sh/ll-expr/src/ast/ast.c b/21sh/ll-expr/src/ast/ast.c
new file mode 100644
index 0000000..701d40e
--- /dev/null
+++ b/21sh/ll-expr/src/ast/ast.c
@@ -0,0 +1,27 @@
+#include "ast.h"
+
+#include <err.h>
+#include <stdlib.h>
+
+struct ast *ast_new(enum ast_type type)
+{
+    struct ast *new = calloc(1, sizeof(struct ast));
+    if (!new)
+        return NULL;
+    new->type = type;
+    return new;
+}
+
+void ast_free(struct ast *ast)
+{
+    if (ast == NULL)
+        return;
+
+    ast_free(ast->left);
+    ast->left = NULL;
+
+    ast_free(ast->right);
+    ast->right = NULL;
+
+    free(ast);
+}
-- 
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