1 files changed, 20 insertions, 0 deletions
diff --git a/graphs/piscine/evalexpr/src/stack.h b/graphs/piscine/evalexpr/src/stack.h
new file mode 100644
index 0000000..d08e465
--- /dev/null
+++ b/graphs/piscine/evalexpr/src/stack.h
@@ -0,0 +1,20 @@
+#ifndef STACK_H
+#define STACK_H
+
+#include "evalexpr.h"
+#include "stack_struct.h"
+
+struct tstack
+{
+    struct token *token;
+    struct tstack *next;
+};
+
+struct stack *stack_push(struct stack *s, int e);
+struct stack *stack_pop(struct stack *s);
+int stack_peek(struct stack *s);
+
+struct tstack *tstack_push(struct tstack *s, struct token *e);
+struct tstack *tstack_pop(struct tstack *s);
+struct token *tstack_peek(struct tstack *s);
+#endif /* !STACK_H */