hi everyone
I learned about the language yesterday and I wanted to use the weekend to try my
hands at it so I'm working on a very simple interpreter for Mouse programming
language
I seem to run into a small problem here though; a $ signals end of file so the
interpreter should exit once it's encountered but for some reason the else
statement also gets called. any ideas why?

`import stack, std/os

proc putChar(c: char) =
    stdout.write c

proc startInterpreter(contents: string, stack: var Stack) =
    var pos = 0
    var curChar: char

    while pos < contents.len and contents[pos] != '$':
        curChar = contents[pos]

        case curChar
            of '$':
                break;

            of '"':
                inc(pos)
                while pos < contents.len and contents[pos] != '"':
                    if contents[pos] == '!':
                        putChar('\n')
                    else:
                        putChar(contents[pos])
                    inc(pos)

            else:
                echo "value not recognised"

        inc(pos)


if isMainModule:
    let fileContents: string = if paramCount() > 0:
                                readFile(paramStr(1))
                            else:
                                ""
    var globalStack: Stack
    startInterpreter(fileContents, globalStack)
`