[llvm-dev] std Namespace Errors

[John Criswell via llvm-dev]

On 8/10/15 3:54 PM, Peter Finn via llvm-dev wrote:
> I’ve been updating SAFECode files to work with LLVM 3.7, and I’ve run 
> into a number of errors I can’t explain.

You might want to see if the "const" qualifier is causing the problem.  
The ostream is a basic_ostream<char> while the string you're passing is 
a "const char".

Regarding the comment about using LLVM's stream classes, the code you're 
working on is a runtime library linked into applications and is not an 
LLVM compiler pass.  Therefore, using std::ostream should be fine (at 
least, it shouldn't be the cause of the problem).

Regards,

John Criswell
>
> In LLVM_SRC/projects/safecode/runtime/BBRuntime/DebugReport.cpp, there 
> are a host of std::ostream objects that, when given strings with the 
> “<<“ operator, produce errors.  Also, the compiler doesn’t seem to 
> recognize std::dec for some reason.  Here is a sample of the errors 
> I’m getting:
>
> */Users/peterfinn/Desktop/llvm_trunk_2/projects/safecode/runtime/BBRuntime/DebugReport.cpp:30:6: 
> **error: **invalid operands to binary expression*
> *      ('std::ostream' (aka 'basic_ostream<char>') and 'const char *')*
>   OS << "= Fault PC Source       :\t"
> *  ~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*
> */Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:5263:1: 
> note: *candidate template ignored: could not match
>       'shared_ptr<type-parameter-0-2>' against 'char const[43]'
> operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> 
> const& __p);
> *^*
> */Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string:4191:1: 
> note: *candidate template ignored: could not match
>       'basic_string<type-parameter-0-0, type-parameter-0-1, 
> type-parameter-0-2>' against 'char const[43]'
> operator<<(basic_ostream<_CharT, _Traits>& __os,
> *^*
> */Users/peterfinn/Desktop/llvm_trunk_2/projects/safecode/runtime/BBRuntime/DebugReport.cpp:32:20: 
> **error: **no member named 'dec' in namespace 'std'*
>     << ":" << std::dec << this->lineNo << "\n";
> *              ~~~~~^*
> */Users/peterfinn/Desktop/llvm_trunk_2/projects/safecode/runtime/BBRuntime/DebugReport.cpp:38:6: 
> **error: **invalid operands to binary expression*
> *      ('std::ostream' (aka 'basic_ostream<char>') and 'const char *')*
>   OS << "= Pool Handle       :\t" << this->PoolHandle << "\n";
> *  ~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*
> */Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/memory:5263:1: 
> note: *candidate template ignored: could not match
>       'shared_ptr<type-parameter-0-2>' against 'char const[43]'
> operator<<(basic_ostream<_CharT, _Traits>& __os, shared_ptr<_Yp> 
> const& __p);
> *^*
> */Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/string:4191:1: 
> note: *candidate template ignored: could not match
>       'basic_string<type-parameter-0-0, type-parameter-0-1, 
> type-parameter-0-2>' against 'char const[43]'
> operator<<(basic_ostream<_CharT, _Traits>& __os,
> *^*
> *
> *
> I’ve been trying to find information online, but I’ve found nothing 
> helpful.  I tried creating my own test programs, with my own 
> std::ostream objects, but I couldn’t recreate the errors.  Do you have 
> any idea what could be causing this problem?
>
> Thanks,
> Peter Finn
>
>
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-- 
John Criswell
Assistant Professor
Department of Computer Science, University of Rochester
http://www.cs.rochester.edu/u/criswell

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