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[Qemu-devel] [PULL 28/43] CODING_STYLE: update mixed declaration rules


From: Paolo Bonzini
Subject: [Qemu-devel] [PULL 28/43] CODING_STYLE: update mixed declaration rules
Date: Wed, 9 Sep 2015 15:49:58 +0200

Mixed declarations do come in handy at the top of #ifdef blocks.
Reluctantly allow this particular usage and suggest an alternative.

Reviewed-by: Stefan Hajnoczi <address@hidden>
Signed-off-by: Paolo Bonzini <address@hidden>
---
 CODING_STYLE | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/CODING_STYLE b/CODING_STYLE
index d46cfa5..3c6978f 100644
--- a/CODING_STYLE
+++ b/CODING_STYLE
@@ -87,10 +87,15 @@ Furthermore, it is the QEMU coding style.
 
 5. Declarations
 
-Mixed declarations (interleaving statements and declarations within blocks)
-are not allowed; declarations should be at the beginning of blocks.  In other
-words, the code should not generate warnings if using GCC's
--Wdeclaration-after-statement option.
+Mixed declarations (interleaving statements and declarations within
+blocks) are generally not allowed; declarations should be at the beginning
+of blocks.
+
+Every now and then, an exception is made for declarations inside a
+#ifdef or #ifndef block: if the code looks nicer, such declarations can
+be placed at the top of the block even if there are statements above.
+On the other hand, however, it's often best to move that #ifdef/#ifndef
+block to a separate function altogether.
 
 6. Conditional statements
 
-- 
2.4.3





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