sformat

fnchar[] sformat(Char, Args...)(return scope char[] buf, scope const(Char)[] fmt, Args args)

Converts its arguments according to a format string into a buffer. The buffer has to be large enough to hold the formatted string.

The second version of sformat takes the format string as a template argument. In this case, it is checked for consistency at compile-time.

`buf`	the buffer where the formatted string should go
`fmt`	a format string
`args`	a variadic list of arguments to be formatted
`Char`	character type of `fmt`
`Args`	a variadic list of types of the arguments

A slice of buf containing the formatted string.

A RangeError if buf

isn't large enough to hold the formatted string and a FormatException if formatting did not succeed.

In theory this function should be @nogc. But with the current

implementation there are some cases where allocations occur:

fnchar[] sformat(alias fmt, Args...)(char[] buf, Args args) if (isSomeString!(typeof(fmt)))

ditto