formattedWrite

fnuint formattedWrite(Writer, Char, Args...)(auto ref Writer w, const scope Char[] fmt, Args args)

Converts its arguments according to a format string and writes the result to an output range.

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

`w`	an output range, where the formatted result is written to
`fmt`	a format string
`args`	a variadic list of arguments to be formatted
`Writer`	the type of the writer `w`
`Char`	character type of `fmt`
`Args`	a variadic list of types of the arguments

The index of the last argument that was formatted. If no positional

arguments are used, this is the number of arguments that where formatted.

if formatting did not succeed.

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

implementation there are some cases where allocations occur. See sformat for more details.

fnuint formattedWrite(alias fmt, Writer, Args...)(auto ref Writer w, Args args) if (isSomeString!(typeof(fmt)))

ditto