http://llvm.org/bugs/show_bug.cgi?id=17782
Bug ID: 17782
Summary: num_get::do_get(in, end, double) broken if double is
followed by character
Product: libc++
Version: unspecified
Hardware: Macintosh
OS: MacOS X
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
Created attachment 11475
--> http://llvm.org/bugs/attachment.cgi?id=11475&action=edit
Test program documenting the problem.
When extracting doubles from stringstream the character following the double
affects if extraction works or not (see attached code example). If the double
is followed by a space or underscore extraction works, if a letter follows
extraction fails. It seems to be related to the extraction of the double
performed by num_get::do_get().
If I read the standard correctly (ISO/IEC 14882:2003(E), 22.2.2.1.2 num_get
virtual functions [lib.facet.num.get.virtuals]; sorry no 2011 at hand) this
should work independently of the character following the double.
Tested with:
$ c++ --version
Apple LLVM version 5.0 (clang-500.2.79) (based on LLVM 3.3svn)
Target: x86_64-apple-darwin13.0.0
Thread model: posix
Steps to reproduce:
1. Compile the attached test program (c++ --stdlib=libc++ streamtest.cxx)
2. Run the attached test program
Actual result:
'-4.9' converted to -4.9
'-4.9 X' converted to -4.9
'-4.9_' converted to -4.9
'-4.9d' failed to convert to double
'-4.9X' failed to convert to double
Expected result: (produced with c++ --stdlib=libstdc++ streamtest.cxx)
'-4.9' converted to -4.9
'-4.9 X' converted to -4.9
'-4.9_' converted to -4.9
'-4.9d' converted to -4.9
'-4.9X' converted to -4.9
Build Date & Platform: 2013-11-01 on Mac OS 10.9
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