Hi there! My use-case involves reading all data off of an io.Reader and 
scanning it into a receiver value provided by the user of my library. In 
many ways the same thing as fmt.Fscan. The difference is that only one 
receiver value is allowed, and I want to read _all_ data until io.EOF, not 
just until space or newline. So if my data is "hello world" and I'm 
scanning into a string, that string should have "hello world" in it. If my 
data is "12 OK" and I'm scanning into an int, that should error because the 
entirety of the data is not a parseable integer.

If there was a fmt.Scanf which simply had no delimiter, or where the 
delimiter was somehow set to io.EOF, I think that would work for what I'm 
doing. But I can't find anything like that. Does anyone know of anything 
that could help me do this? Or do I just have to implement it myself?

Thanks!
Brian

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