Re: [Boost-users] problem with boost::phoenix::lambda

AMDG Kim Kuen Tang wrote:

the following code

double abc=lambda(_a=*ref(it)++)[_a*2.0]()(); // here 'it' is an //iterator

produces the error C2440: 'initializing' : cannot convert from 'boost::phoenix::detail::error_expecting_arguments' to 'double'

which should not be. The two lines of code

let(_a=*ref(it)++)[_a*2.0](); //or

lambda(_a=*ref(it)++)[_a*2.0*arg1]()( val);

compile fine.

Perhaps someone has an answer to this error? ( I use boost trunk version and msvc 2008)

To reproduce the errors just compile the code below.

The problem is that no_nullary doesn't handle local variables well. Fixing this will require propagating the variables that are undefined up through every subexpression. In Christ, Steven Watanabe