Suggestion for Syntax Sugar:

Would it make sense to permit a simple way to allow a coder to document the 
function argument type?

f <- function( a:chr, b:data.frame, c:logi ) { … }

presumably, what comes behind the ‘:’ should match what ‘str’ returns.

however, this need not be checked (except perhaps when a particular option is 
set).  catching errors as soon as possible makes code easier to debug and error 
messages clearer.

regards,

/iaw

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