Compile-time conversions from string to integer, real, etc.

[Don Clugston]

Don Clugston wrote:
> Walter Bright wrote:
>> Don Clugston wrote:
>>> In std.metastring there are functions to convert integers to strings 
>>> at compile time,
>>
>> Can these be replaced with .stringof ?
> Yup. It should probably be wrapped in a deprecated{} now. As should 
> std.math2.

For example:

template toString(real x)
{
     const char [] toString=x.stringof;
}

Unfortunately, none of these work inside a CTFE function. The problem 
is, that a CTFE function has to also work at runtime, and so it can't 
use compile-time variables in template value arguments (and it can't 
index tuples, etc). These kinds of operations are the only ones where 
template metaprogramming still survives.