Using as object in a function signature causes parse failure

[sjbarag]

The Reference BrightScript Implementation allows as object to be used as a type suffix for function arguments and function returns, but it currently causes a parse failure here:

Failing file:

sub Main()
    test(invalid)
end sub

sub test(foo as object)
    print "if you can read this, the bug has been fixed"
end sub

Main()

Failed output:

$ brs ./object-mwe.brs
[Line 5] Function parameter [object Object] is of invalid type 'object'
[Line 7] Found unexpected token 'end sub'
Error occurred

[sjbarag]

Looks like there's another bug in reporting that error – [object Object] is a bit of JavaScript object leakage.