b1bdfc1803
# withr 2.5.0 * `defer()` and all `local_*()` functions now work when run inside of a `.Rmd`. The deferred expressions are executed when knitr exits. * `defer()` and `local_` functions now work within `source()`. The deferred expressions are executed when `source()` exits. * `with_()` and `local_()` gain a `get` argument. Supply a getter function to create `with` and `local` functions that are robust to early exits. When supplied, this restoration pattern is used: ``` old <- get() on.exit(set(old)) set(new) action() ``` Instead of: ``` old <- set(new) on.exit(set(old)) action() ``` This ensures proper restoration of the old state when an early exit occurs during `set()` (for instance when a deprecation warning is caught, see #191). * These `with_` and `local_` functions are now robust to early exits (see next bullet): - `_locale()` - `_envvar()` - `_libpaths()` - `_options()` - `_par()` - `_path()` - `_seed()` * `with_namespace()` and `local_namespace()` now pass `warn.conflicts` to `attach()` (@kyleam, #185). * `local_rng_version()` and `local_seed()` no longer warn when restoring `sample.kind` to `"Rounding"` (#167). * `with_seed()` now preserves the current values of `RNGkind()` (#167). * `with_collate()` is no longer affected by the `LC_COLLATE` environment variable set to "C" (#179). * Local evaluations in the `globalenv()` (as opposed to top-level ones) are now unwound in the same way as regular environments. * `local_tempfile()` gains a lines argument so, if desired, you can pre-fill the temporary file with some data. |
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