В Wed, 1 Mar 2023 01:36:02 -0800
Michael Chirico via R-devel <[email protected]> пишет:
> +comps[non_syntactic] <- paste0("`", comps[non_syntactic], "`")
There are a few more corner cases. For example, comps could contain
backticks (which should be escaped with backslashes) and backslashes
(which should also be escaped). Thankfully, \uXXXX-style Unicode escape
sequences are not currently supported inside backticks, and "escape the
backslash" rule already takes care of them.
The deparse() function already knows these rules:
name <- 'hello world ` \\uFF'
cat(deparse1(as.name(name), backtick=TRUE), '\n')
# `hello world \` \\uFF`
`hello world \` \\uFF` <- 'hello'
`hello world \` \\uFF`
# [1] "hello"
--
Best regards,
Ivan
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