[LLVMbugs] [Bug 14508] New: SubstTemplateTypeParmType::getReplacementType with typedefs

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=14508

             Bug #: 14508
           Summary: SubstTemplateTypeParmType::getReplacementType with
                    typedefs
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: -New Bugs
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: thomas at techsoft3d.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


clang::SubstTemplateTypeParmType::getReplacementType() will not return a
TypedefType if the replacement type was written in source code as a typedef
type. Instead, it will return the desugared typedef type.

This is problematic when trying to deal with typedefs such as size_t.

Test case:

#include <vector>

typedef std::vector<size_t> SizeTArray;

int main () {
    SizeTArray x;
    x.insert(
        x.begin(), // incorrectly gets replacement type as BuiltinType
"unsigned int" instead of as TypedefType "size_t"
        x.begin(),
        x.end());
    return 0;
}

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