I have been debugging LLDB trying to find where the name mangling is
getting messed up during eval parsing of std::string::c_str() and have
traced it into CXXNameMangler::mangleStandardSubstitution in
ItaniumMangle.cpp which is part of clangs AST module. In
mangleStandardSubstitution it is testing the identifier to see if it is
a ClassTemplateSpecializationDecl equivalent to
std::basic_string<char,std::char_traits<char>,std::allocator<char>> so
that it can substitute the short form mangled string "Ss". This check
fails on the second template argument test where it is checking if it is
a char specialization of char_traits.
if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits"))
return false;
I have dumped the declaration to verify it is the correct identifier:
class basic_string definition
|-TemplateArgument type 'char'
|-TemplateArgument type 'struct std::char_traits<char>'
|-TemplateArgument type 'class std::allocator<char>'
I also dumped the template arguments separately:
char identifier
struct std::char_traits<char> identifier
class std::allocator<char> identifier
I am not familiar enough yet with the Clang architecture to understand
why this check is failing. Any suggestions on how to track this down
would be appreciated.
- Alex
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