From ddacdf17353f33d7697f38b90a330ecc142e6194 Mon Sep 17 00:00:00 2001
From: Superjom <superjom@gmail.com>
Date: Fri, 4 Aug 2017 13:29:51 +0800
Subject: [PATCH] init enforce eq

---
 paddle/platform/enforce.h       |  9 ++++---
 paddle/platform/enforce_test.cc | 47 +++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 4 deletions(-)

diff --git a/paddle/platform/enforce.h b/paddle/platform/enforce.h
index 7e03bf4425..a0d93a38ce 100644
--- a/paddle/platform/enforce.h
+++ b/paddle/platform/enforce.h
@@ -162,10 +162,11 @@ inline void throw_on_error(T e) {
     }                                                                   \
   } while (0)
 
-#define PADDLE_ENFORCE_EQ(__VAL0, __VAL1)                                   \
-  PADDLE_ENFORCE((__VAL0) == (__VAL1), "enforce %s == %s failed, %s != %s", \
-                 #__VAL0, #__VAL1, std::to_string(__VAL0),                  \
-                 std::to_string(__VAL1));
+#define PADDLE_ENFORCE_EQ(__VAL0, __VAL1, ...)                              \
+  PADDLE_ENFORCE((__VAL0) == (__VAL1),                                      \
+                 "enforce %s == %s failed, %s != %s\n%s", #__VAL0, #__VAL1, \
+                 std::to_string(__VAL0), std::to_string(__VAL1),            \
+                 paddle::string::Sprintf("" __VA_ARGS__));
 
 }  // namespace platform
 }  // namespace paddle
diff --git a/paddle/platform/enforce_test.cc b/paddle/platform/enforce_test.cc
index 2ac31812a8..c44fb4360d 100644
--- a/paddle/platform/enforce_test.cc
+++ b/paddle/platform/enforce_test.cc
@@ -34,3 +34,50 @@ TEST(ENFORCE, FAILED) {
   }
   ASSERT_TRUE(in_catch);
 }
+
+TEST(ENFORCE, NO_ARG_OK) {
+  int a = 2;
+  int b = 2;
+  PADDLE_ENFORCE_EQ(a, b);
+  // test enforce with extra message.
+  PADDLE_ENFORCE_EQ(a, b, "some thing wrong %s", "info");
+}
+
+TEST(ENFORCE_EQ, NO_EXTRA_MSG_FAIL) {
+  int a = 2;
+  bool in_catch = false;
+
+  try {
+    PADDLE_ENFORCE_EQ(a, 1 + 3);
+
+  } catch (paddle::platform::EnforceNotMet error) {
+    in_catch = true;
+    const std::string msg = "enforce a == 1 + 3 failed, 2 != 4";
+    const char* what = error.what();
+    for (size_t i = 0; i < msg.length(); ++i) {
+      ASSERT_EQ(what[i], msg[i]);
+    }
+  }
+
+  ASSERT_TRUE(in_catch);
+}
+
+TEST(ENFORCE_EQ, EXTRA_MSG_FAIL) {
+  int a = 2;
+  bool in_catch = false;
+
+  try {
+    PADDLE_ENFORCE_EQ(a, 1 + 3, "%s size not match", "their");
+
+  } catch (paddle::platform::EnforceNotMet error) {
+    in_catch = true;
+    const std::string msg =
+        "enforce a == 1 + 3 failed, 2 != 4\ntheir size not match";
+    const char* what = error.what();
+    for (size_t i = 0; i < msg.length(); ++i) {
+      ASSERT_EQ(what[i], msg[i]);
+    }
+  }
+
+  ASSERT_TRUE(in_catch);
+}
-- 
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