From mboxrd@z Thu Jan  1 00:00:00 1970
From: tipecaml@gmail.com (Cyril Roelandt)
Date: Tue, 19 Feb 2013 21:44:12 +0100
Subject: [Cocci] [Coccinellery] drop_continue/cont.cocci broken ?
Message-ID: <5123E41C.30603@gmail.com>
To: cocci@systeme.lip6.fr
List-Id: cocci@systeme.lip6.fr

Hi!

I think the drop_continue/cont.cocci script is broken. Here is a simple 
semantic patch extracted from it:


$ cat foo.cocci
@@
statement S;
@@
for (...;...;...) {
   ...
   if (...)
- {
     S
-   continue;
- }
}


A simple C file:

$ cat continue.c
static void
foo(int max)
{
	int i;
	for (i = 0; i < max; i++) {
		do_stuff();
		if (i == 42) {
			do_stg_else();
			continue;
		}
	}
}

$ spatch -sp_file foo.cocci continue.c --debug --verbose-parsing
init_defs_builtins: /home/cyril/opt/spatch/share/coccinelle/standard.h
-----------------------------------------------------------------------
processing semantic patch file: foo.cocci
with isos from: /home/cyril/opt/spatch/share/coccinelle/standard.iso
-----------------------------------------------------------------------
@@
statement S;
@@
for (...;...;...) {
   ...
   if (...)
- {
     S
-   continue;
- }
}

warning: iso braces1 does not match the code below on line 4
{
   ...
   if (...) {
     S
     continue;
   }
}
braces must be all minus (plus code allowed) or all
context (plus code not allowed in the body) to match:
{
   ...
   if (...) {
     S
     continue;
   }
}
HANDLING: continue.c
-----------------------------------------------------------------------
let's go
-----------------------------------------------------------------------
-----------------------------------------------------------------------
-----------------------------------------------------------------------
rule starting on line 1 =
-----------------------------------------------------------------------
dependencies for rule rule starting on line 1 satisfied:
binding in = []
binding relevant in = []
      transformation info returned:
           transform state: 18
                with rule_elem: -{

                with binding: []
           transform state: 20
                with rule_elem: -continue-;
                with binding: []
      binding out = []
      transform one node: 20
      transform one node: 18
PB: found closing brace alone in fuzzy parsing
ERROR-RECOV: end of file while in recovery mode
parsing pass2: try again
ERROR-RECOV: end of file while in recovery mode
parse error
  = File "/tmp/cocci_small_output-5101-1385aa.c", line 11, column 0, 
charpos = 118
     around = '}', whole content = }
badcount: 1
bad: 	}
BAD:!!!!! }
ALREADY AT END
-----------------------------------------------------------------------
Finished
-----------------------------------------------------------------------
PB: found closing brace alone in fuzzy parsing
ERROR-RECOV: end of file while in recovery mode
parsing pass2: try again
ERROR-RECOV: end of file while in recovery mode
parse error
  = File "/tmp/cocci-output-5101-f0bc97-continue.c", line 11, column 0, 
  charpos = 118
     around = '}', whole content = }
badcount: 1
bad: 	}
BAD:!!!!! }
ALREADY AT END
diff =
--- continue.c
+++ /tmp/cocci-output-5101-f0bc97-continue.c
@@ -4,9 +4,8 @@ foo(int max)
  	int i;
  	for (i = 0; i < max; i++) {
  		do_stuff();
-		if (i == 42) {
+		if (i == 42)
  			do_stg_else();
-			continue;
  		}
  	}
  }
Check duplication for 1 files




There is a missing closing brace in the resulting code. I can reproduce 
this with both 1.0-rc12 (packaged in Debian) and 1.0-rc16. The same 
thing happens when using "*" instead of "-", and when using the "break" 
keyword instead of the "continue" keyword.


WBR,
Cyril Roelandt.