The 22.locale.num.put.stdcxx-2 regression test fails on gcc/Linux
(and I suppose that fails on every compiler on non-Windows platform).
The fail is caused when precision is 0, and in this case the precision
is not used in sprintf() format string generated by
__rw_get_stdio_fmat().
As a result the default precision equal to 6 is used.
As I understand the lwg issue 231 resolution, the precision should be
used always for conversions from a floating-point type:
22.2.2.2.2 p5
"For conversion from a floating-point type, str .precision() is
specified in the conversion specification."
The proposed patch below:
Index: src/punct.cpp
===================================================================
--- src/punct.cpp (revision 631177)
+++ src/punct.cpp (working copy)
@@ -619,9 +619,7 @@
const int fltfld = fmtflags & _RWSTD_IOS_FLOATFIELD;
// follows resolution of lwg issue 231
- if ( ( _RWSTD_IOS_FIXED == fltfld
- || _RWSTD_IOS_SCIENTIFIC == fltfld)
- && prec >= 0 || prec > 0) {
+ if (0 <= prec) {
// 7.19.6.1, p5 of C99 specifies that, when given using the
// asterisk, negative precision is treated the same as if
Farid.
