Baffled by compilation error for formattedRead

[Dennis Ritchie via Digitalmars-d-learn]

On Thursday, 7 May 2015 at 23:13:41 UTC, PhilipDaniels wrote:
> On Thursday, 7 May 2015 at 23:10:26 UTC, PhilipDaniels wrote:
>
> Let's try reformatting that...
>
> ubyte r, g, b;
>
> // does not compile
> auto numRead = formattedRead(dropExactly(input, 4), "%x/%x/%x", 
> &r, &g, &b);
> // does not compile
> auto numRead = formattedRead(input[4..$], "%x/%x/%x", &r, &g, 
> &b);
>
> // compiles
> string s2 = input[4..$];
> auto numRead = formattedRead(s2, "%x/%x/%x", &r, &g, &b);

Alternatively, I can suggest to use the function csvReader():

-----
import std.csv,
        std.stdio,
        std.format;

void main() {

	auto input = "rgb:10/30/40";
	input = input[4 .. $];

	ubyte r, g, b;

	formattedRead(input, "%s/%s/%s", &r, &g, &b);

	auto numRead = [r, g, b];

	string[] numReadHex;
	foreach (e; numRead) {
		numReadHex ~= format("%x", e);
	}

	writeln(numRead);		// [10, 30, 40]
	writeln(numReadHex);	// ["a", "1e", "28"]

	auto inputNew = "rgb:10/30/40";
	auto newNumRead = csvReader!int(inputNew[4 .. $], '/').front;

	writeln(newNumRead); // [10, 30, 40]
}