From 8e650c8ff7d195b5efd860da199c8d0801f065d0 Mon Sep 17 00:00:00 2001
From: Michael Scire <SciresM@gmail.com>
Date: Thu, 30 May 2019 18:34:36 -0700
Subject: [PATCH] libstrat: add R_TRY helper macro.

---
 include/stratosphere/results.hpp         |  3 +++
 include/stratosphere/results/utilities.h | 25 ++++++++++++++++++++++++
 2 files changed, 28 insertions(+)
 create mode 100644 include/stratosphere/results/utilities.h

diff --git a/include/stratosphere/results.hpp b/include/stratosphere/results.hpp
index ac352e1d..e8ac6010 100644
--- a/include/stratosphere/results.hpp
+++ b/include/stratosphere/results.hpp
@@ -16,6 +16,9 @@
  
 #pragma once
 
+/* Utilities. */
+#include "results/utilities.h"
+
 /* Official. */
 #include "results/creport_results.hpp"
 #include "results/debug_results.hpp"
diff --git a/include/stratosphere/results/utilities.h b/include/stratosphere/results/utilities.h
new file mode 100644
index 00000000..7b3a54d8
--- /dev/null
+++ b/include/stratosphere/results/utilities.h
@@ -0,0 +1,25 @@
+/**
+ * @file result_utilities.h
+ * @brief Utilities for handling Results.
+ * @author SciresM
+ * @copyright libnx Authors
+ */
+#pragma once
+#include <switch/result.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/// Evaluates an expression that returns a result, and returns the result if it would fail.
+#define R_TRY(res_expr) \
+    do { \
+        const Result _tmp_r_try_rc = res_expr; \
+        if (R_FAILED(_tmp_r_try_rc)) { \
+            return _tmp_r_try_rc; \
+        } \
+    } while (0)
+
+#ifdef __cplusplus
+}
+#endif