id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
9152	Classic Spirit parser does not handle negative exponents when patform does not support denormalized numbers.	Matthew Markland <markland@…>	Joel de Guzman	"A classic Spirit parser has trouble parsing floating point values which have a negative exponent on platforms where has_denorm is false. The initial example from the Spirit documentation illustrates the problem (note, this is the example from the 1.8.5 documentation, tweaked for 1.54).

{{{
markland@jute geir2 $ CC -I/cray/css/users/markland/boost_1_54_0 classic_numbers.cpp
markland@jute geir2 $ ./a.out
/////////////////////////////////////////////////////////

                A comma separated list parser for Spirit...

/////////////////////////////////////////////////////////

Give me a comma separated list of numbers.
The numbers will be inserted in a vector of numbers
Type [q or Q] to quit

1.5
-------------------------
Parsing succeeded
1.5 Parses OK:
0: 1.5
-------------------------
1e-07
-------------------------
Parsing failed
-------------------------
Bye... :-)
}}}

This looks to be an issue in the negative_accumulate::add() function found in boost/spirit/home/classic/core/primitives/impl/numerics.ipp.

The platform I have seen this fail on is using the Cray Compiling Environment version 8.x. I do not currently have a patch or a workaround.

The Qi parser example appears to work for this example, even on the Cray platform."	Bugs	closed	To Be Determined	spirit	Boost 1.54.0	Problem	wontfix		markland@…