Capture all errors, warnings and messages.

Usage

purely(.f, strict = 2)

Arguments

.f: A function to decorate.
strict: Controls if the decorated function should catch only errors (1), errors and warnings (2, the default) or errors, warnings and messages (3).

Value

A function which returns a list. The first element of the list, $value, is the result of the original function .f applied to its inputs. The second element, $log is NULL in case everything goes well. In case of error/warning/message, $value is NA and $log

holds the message. purely() is used by record() to allow the latter to handle errors.

Examples

purely(log)(10)
#> $value
#> Just
#> [1] 2.302585
#> 
#> $log_df
#> [1] NA
#> 
purely(log)(-10)
#> $value
#> Nothing
#> 
#> $log_df
#> [1] "NaNs produced"
#> 
purely(log, strict = 1)(-10) # This produces a warning, so with strict = 1 nothing gets captured.
#> Warning: NaNs produced
#> $value
#> Just
#> [1] NaN
#> 
#> $log_df
#> [1] NA
#>