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[Bug python/14386] std::bitset not iterable
- From: "andreasheimberger at gmx dot at" <sourceware-bugzilla at sourceware dot org>
- To: gdb-prs at sourceware dot org
- Date: Tue, 31 Jul 2012 21:27:42 +0000
- Subject: [Bug python/14386] std::bitset not iterable
- Auto-submitted: auto-generated
- References: <bug-14386-4717@http.sourceware.org/bugzilla/>
http://sourceware.org/bugzilla/show_bug.cgi?id=14386
--- Comment #2 from andreasheimberger at gmx dot at 2012-07-31 21:27:42 UTC ---
g++ (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3
GNU gdb (Ubuntu/Linaro 7.4-2012.04-0ubuntu2) 7.4-2012.04
STL Support Implementation -> http://sourceware.org/gdb/wiki/STLSupport
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That should be your printer implementation
--------------------------------------------------------------------------------
class StdBitsetPrinter:
"Print a std::bitset"
def __init__(self, typename, val):
self.typename = typename
self.val = val
def to_string (self):
# If template_argument handled values, we could print the
# size. Or we could use a regexp on the type.
return '%s' % (self.typename)
def children (self):
words = self.val['_M_w']
wtype = words.type
# The _M_w member can be either an unsigned long, or an
# array. This depends on the template specialization used.
# If it is a single long, convert to a single element list.
if wtype.code == gdb.TYPE_CODE_ARRAY:
tsize = wtype.target ().sizeof
else:
words = [words]
tsize = wtype.sizeof
nwords = wtype.sizeof / tsize
result = []
byte = 0
while byte < nwords:
w = words[byte]
bit = 0
while w != 0:
if (w & 1) != 0:
# Another spot where we could use 'set'?
result.append(('[%d]' % (byte * tsize * 8 + bit), 1))
bit = bit + 1
w = w >> 1
byte = byte + 1
return result
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That's my source file
--------------------------------------------------------------------------------
#include <bitset>
int main()
{
const int bitsetsize = 8;
std::bitset<bitsetsize> bits;
for(int i = 0; i < bitsetsize; i++) {
if(i%2 == 0 || i == 0) {bits[i].flip(); }
}
return 0;
}
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My Debug Commands
--------------------------------------------------------------------------------
-enable-pretty-printing
-break-insert 10
-exec-run
-var-create - * bits
Thanks for your reply
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