Polish code

test=develop

paddle/fluid/platform/enforce.h

@@ -260,12 +260,12 @@ inline void throw_on_error(T e) {
 
 #define PADDLE_JUDGE
 
-#define __PADDLE_UNARY_COMPARE(COND, ...)                      \
+#define __PADDLE_UNARY_COMPARE(COND, ...)                        \
-  do {                                                         \
+  do {                                                           \
-    auto cond = COND;                                          \
+    auto __cond = COND;                                          \
-    if (UNLIKELY(::paddle::platform::is_error(cond))) {        \
+    if (UNLIKELY(::paddle::platform::is_error(__cond))) {        \
-      ::paddle::platform::throw_on_error(cond, ##__VA_ARGS__); \
+      ::paddle::platform::throw_on_error(__cond, ##__VA_ARGS__); \
-    }                                                          \
+    }                                                            \
   } while (0)
 
 #ifndef REPLACE_ENFORCE_GLOG