std Namespace Errors

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1

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.

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’) 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’ 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’) 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’ 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

2

Hi Peter,

Seeing as SAFECode is built on top of LLVM it should probably be using
llvm::raw_ostream rather than std::ostream.
This doesn't really answer your question though. I'm afraid I don't
know why you're getting these errors.

3

You might want to see if the “const” qualifier is causing the problem. The ostream is a basic_ostream 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