[Rd] Bug in comparison of language objects?

[Duncan Murdoch]

I noticed the following odd behaviour today:

  exprs <- expression( mean(a), mean(b), { a }, { b } )
  exprs[[1]] == exprs[[2]]
  #> [1] FALSE

  exprs[[3]] == exprs[[4]]
  #> [1] TRUE

Does it make sense to anyone that the argument passed to `mean` matters, 
but the expression contained in braces doesn't?

Duncan Murdoch

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