From 5eed5fa65f7a965c7af6d77602693ac2d66922b0 Mon Sep 17 00:00:00 2001
From: matteo <matteo.flebus@epita.fr>
Date: Sat, 31 Jan 2026 19:25:42 +0100
Subject: [PATCH] feat: ast_subshell

---
 src/utils/Makefile.am        |  1 +
 src/utils/ast/ast.h          |  1 +
 src/utils/ast/ast_base.h     |  3 ++-
 src/utils/ast/ast_subshell.c | 31 +++++++++++++++++++++++++++++++
 src/utils/ast/ast_subshell.h | 19 +++++++++++++++++++
 5 files changed, 54 insertions(+), 1 deletion(-)
 create mode 100644 src/utils/ast/ast_subshell.c
 create mode 100644 src/utils/ast/ast_subshell.h

diff --git a/src/utils/Makefile.am b/src/utils/Makefile.am
index 17454d2..ddb862c 100644
--- a/src/utils/Makefile.am
+++ b/src/utils/Makefile.am
@@ -21,6 +21,7 @@ libutils_a_SOURCES =  \
 	args/args.c \
 	vars/vars.c \
 	ast/ast_assignment.c \
+	ast/ast_subshell.c \
 	ast/ast_function.c
 
 libutils_a_CPPFLAGS = -I$(top_srcdir)/src
diff --git a/src/utils/ast/ast.h b/src/utils/ast/ast.h
index 12abee5..2eac62f 100644
--- a/src/utils/ast/ast.h
+++ b/src/utils/ast/ast.h
@@ -15,5 +15,6 @@
 #include "ast_redir.h"
 #include "ast_void.h"
 #include "ast_word.h"
+#include "ast_subshell.h"
 
 #endif /* ! AST_H */
diff --git a/src/utils/ast/ast_base.h b/src/utils/ast/ast_base.h
index e1c7b07..de7dcfa 100644
--- a/src/utils/ast/ast_base.h
+++ b/src/utils/ast/ast_base.h
@@ -18,7 +18,8 @@ enum ast_type
     AST_NEG,
     AST_LOOP,
     AST_ASSIGNMENT,
-    AST_FUNCTION
+    AST_FUNCTION,
+    AST_SUBSHELL
 };
 
 struct ast
diff --git a/src/utils/ast/ast_subshell.c b/src/utils/ast/ast_subshell.c
new file mode 100644
index 0000000..36efd6f
--- /dev/null
+++ b/src/utils/ast/ast_subshell.c
@@ -0,0 +1,31 @@
+#include "ast_subshell.h"
+
+bool ast_is_subshell(struct ast *node)
+{
+    return node != NULL && node->type == AST_SUBSHELL;
+}
+
+struct ast_subshell *ast_get_subshell(struct ast *node)
+{
+    if (ast_is_subshell(node))
+        return (struct ast_subshell *)node->data;
+    return NULL;
+}
+
+struct ast *ast_create_subshell(struct ast *child)
+{
+    struct ast_subshell *subshell = calloc(1, sizeof(struct ast_subshell));
+    if (subshell == NULL)
+        return NULL;
+    subshell->child = child;
+
+    return ast_create(AST_SUBSHELL, subshell);
+}
+
+void ast_free_subshell(struct ast_subshell *subshell)
+{
+    if (!subshell)
+        return;
+    ast_free(&subshell->child);
+    free(subshell);
+}
diff --git a/src/utils/ast/ast_subshell.h b/src/utils/ast/ast_subshell.h
new file mode 100644
index 0000000..a4648ef
--- /dev/null
+++ b/src/utils/ast/ast_subshell.h
@@ -0,0 +1,19 @@
+#ifndef AST_SUBSHELL_H
+#define AST_SUBSHELL_H
+
+#include "ast_base.h"
+
+struct ast_subshell
+{
+    struct ast *child;
+};
+
+bool ast_is_subshell(struct ast *node);
+
+struct ast_subshell *ast_get_subshell(struct ast *node);
+
+struct ast *ast_create_subshell(struct ast *child);
+
+void ast_free_subshell(struct ast_subshell *subshell);
+
+#endif /* ! AST_SUBSHELL_H */
\ No newline at end of file