[LLVMbugs] [Bug 18417] New: Default recursive template instantiations is lower than recommended

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18417

            Bug ID: 18417
           Summary: Default recursive template instantiations is lower
                    than recommended
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++1y
          Assignee: unassignedclangbugs at nondot.org
          Reporter: ken at fsfoundry.org
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified

N3690 annex B states:
- Recursively nested template instantiations, including substitution during
template argument deduction (14.8.2) [1024].

Though this is not a compliance issue, IMO, it would be nice if clang could do
-ftemplate-depth=1024 by default, which is the case with gcc (gcc-4.8 at
least).

$ man gcc
[snipped...]
       -ftemplate-depth=n
           Set the maximum instantiation depth for template classes to n.  A
limit on the template instantiation depth
           is needed to detect endless recursions during template class
instantiation.  ANSI/ISO C++ conforming
           programs must not rely on a maximum depth greater than 17 (changed
to 1024 in C++0x).
[snipped...]

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