[LLVMbugs] [Bug 9890] New: Should accept -ftemplate-depth=N with a warning

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue May 10 10:58:28 PDT 2011


           Summary: Should accept -ftemplate-depth=N with a warning
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Driver
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: dgregor at apple.com
                CC: llvmbugs at cs.uiuc.edu

For some silly reason, GCC used


rather than the more obvious


and we mimic that behavior. At the very least, we should support


as an alias (and perhaps provide a warning at the driver level).

To see why:

$ cat test.cpp
template<bool b, int t, int f>
struct _if {
  static const int result = f;

template<int t, int f>
struct _if<true, t, f> {
  static const int result = t;

template<int i>
struct fact {
  static const int result = _if<i == 0, 1, i*fact<i - 1>::result>::result;

int main()
  int a = fact<4>::result;

$ clang++ -ftemplate-depth=100 test.cpp 
clang: error: unable to execute command: Segmentation fault: 11
clang: error: clang frontend command failed due to signal 1 (use -v to see

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