feat: redirection rules

src/parser/grammar_advanced.c

@@ -0,0 +1,28 @@
+#include "grammar_advanced.h"
+
+#include <stdio.h>
+
+#include "grammar_basic.h"
+
+struct ast *parse_redirection(struct lexer_context *ctx)
+{
+    struct token *token = PEEK_TOKEN();
+    if (token->type == TOKEN_IONUMBER)
+    {
+        // TODO
+        POP_TOKEN();
+        token = PEEK_TOKEN();
+    }
+
+    if (token->type != TOKEN_REDIRECTION)
+    {
+        puts("Syntax error: expected a redirection token but got something "
+             "else");
+        return NULL;
+    }
+}
+
+struct ast *parse_prefix(struct lexer_context *ctx)
+{
+    return parse_redirection(ctx);
+}