Re: help with money_get
Mark Brown wrote:
I am trying to understand how to correctly use the money_get facet
from the standard library. I have been experimenting with the example
program from the Apache stdcxx but I am having trouble getting it to
produce the same output on other implementations of the standard
library. The stdcxx output is:
$1,234.6789 --> "123467" --> 123467
but when I compile it with g++ I get:
$1,234.6789 --> "" --> 0
The facet fails to extract the monetary value. I also tried the latest
STLport with the same result. After removing the last two fractional
digits from the input string "$1,234.6789" all three libraries produce
the same output. Can someone explain what's going on? Is it a bug in g+
+ and STLport?
The example code is on this page:
http://incubator.apache.org/stdcxx/doc/stdlibref/money-get.html#sec12
I've been looking at this example and two questions came up:
1. It does a
return !(std::ios_base::eofbit == state);
in order to determine the success, but I don't think this is right. The
reason is that if it reads the whole input sequence, it should have set the
eof-bit (I think, I'd have to look it up, too). Also, I wonder if the
non-Apache implementations claim success or do they at least signal
failure? The reason is that locales are very dependant on the system, and I
know that on my desktop PC here this code will never work because it's OS
doesn't use locales of the form en_US.
2. What does the inverse procedure produce? What is the output if you invoke
money_put accordingly?
Uli
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