Simple golang program doesn't run

Question

Here is a simple golang script T1.go:

package main

import \"fmt\"

func main() {
    fmt.Println(\"Hello world\")
}

run it with go r

Answer 1

Your Hex dump shows that you are using Carriage Return characters (U+000D) instead of LineFeeds (U+000A) in the T1.go file. Using only CR as End-of-line is an old Mac way of doing it.

The specification states that a new line is a single line feed character. Since this is not found, the parser assumes it is all written on the same line. In such a case, the compiler requires that you actually type out the semi-colons.

Solution

Change your CR to LF and it should work.

If you use Notepad++, you can do this conversion in the menu Edit - EOL Conversion - Unix/OSX Format.

go fmt does not convert CR to LF, while it does convert CRLF to LF.
The same goes for dos2unix. In your case, it should work with mac2unix.