bptry: Try expression evaluation, recovering from bperror signals
In BiocParallel: Bioconductor facilities for parallel evaluation

Description Usage Arguments Value Author(s) See Also Examples

This function is meant to be used as a wrapper around bplapply() and friends, returning the evaluated expression rather than signalling an error.

1	bptry(expr, ..., bplist_error, bperror)

`expr`	An R expression; see `tryCatch`.
`bplist_error`	A ‘handler’ function of a single argument, used to catch `bplist_error` conditions signalled by `expr`. A `bplist_error` condition is signalled when an element of `bplapply` and other iterations contain a evaluation that failed. When missing, the default retrieves the “result” attribute from the error, containing the partially evaluated results. Setting `bplist_error=identity` returns the evaluated condition. Setting `bplist_error=stop` passes the condition to other handlers, notably the handler provided by `bperror`.
`bperror`	A ‘handler’ function of a single argument, use to catch `bperror` conditions signalled by `expr`. A `bperror` is a base class to all errors signaled by BiocParallel code. When missing, the default returns the condition without signalling an error.
`...`	Additional named handlers passed to `tryCatch()`. These user-provided handlers are evaluated before default handlers `bplist_error`, `bperror`.

The partially evaluated list of results.

Martin Morgan martin.morgan@roswellpark.org

tryCatch, bplapply.

param = registered()[[1]]
param
X = list(1, "2", 3)
bptry(bplapply(X, sqrt))                         # bplist_error handler
bptry(bplapply(X, sqrt), bplist_error=identity)  # bperror handler