id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
10193	[Spirit.qi] real_parser is too strict with the exponent part	anonymous	Joel de Guzman	"E.g. parsing  ""4em"" string fails with 
{{{
double_ >> lit(""em"")
}}}

""e"" is considered start of exponent part and integer is expected after it.

Exponent handling as described in documentation as follows:
{{{
exponent_part
    =   (lit('e') | 'E') >> -sign >> +digit
    ;
}}}

But as it is implemented now, grammar should be:
{{{
exponent_part
    =   (lit('e') | 'E') > -sign > +digit
    ;
}}}

It will be better if ""e"" is treated as exponent part only if it is followed by integer (with optional sign)."	Bugs	closed	To Be Determined	spirit	Boost 1.55.0	Problem	fixed