Currently, substring defaults to last=1000000L, which strongly
suggests the intent is to default to "nchar(x)" without having to
compute/allocate that up front.
Unfortunately, this default makes no sense for "very large" strings
which may exceed 1000000L in "width".
The max width of a string is .Machine$integer.max-1:
# works
x = strrep(" ", .Machine$integer.max-1L)
# fails
x = strrep(" ", .Machine$integer.max)
Error in strrep(" ", .Machine$integer.max) :
'Calloc' could not allocate memory (18446744071562067968 of 1 bytes)
(see also the comment in src/main/character.c: "Character strings in R
are less than 2^31-1 bytes, so we use int not size_t.")
So it seems to me either .Machine$integer.max or
.Machine$integer.max-1L would be a more sensible default. Am I missing
something?
Mike C
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