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Run Try/Catch and Process Results

Source: R/formods.R
FM_tc.Rd

Attempts to execute the text in cmd. This is done in a try/catch environment to capture any errors.

Usage

FM_tc(cmd, tc_env, capture)

Arguments

cmd

Character object containing the R command to evaluate in the try/catch block

tc_env

list of with names corresponding to object names and corresponding Values to define in the try/catch environment

capture

Character vector of values to capture after the command is successfully captured

Value

list with the following fields:

  • isgood: Boolean indicating the whether the evaluation was successful.

  • error: If the evaluation failed this contains the error object.

  • msgs: Character vector of messages and/or errors.

  • capture: List with names of objects to be captured and values corresponding to those captured objects.

Examples

# Successful command
res_good = FM_tc("good_cmd=ls()", list(), c("good_cmd"))
res_good
#> $capture
#> $capture$good_cmd
#> [1] "capture" "cmd"     "isgood"  "msgs"    "name"    "tc_env"  "tcres"  
#> 
#> 
#> $isgood
#> [1] TRUE
#> 

# Failed command
res_bad = FM_tc("bad_cmd =not_a_command()", list(), c("bad_cmd"))
res_bad
#> $error
#> <simpleError in not_a_command(): could not find function "not_a_command">
#> 
#> $isgood
#> [1] FALSE
#> 
#> $msgs
#> [1] "message: could not find function \"not_a_command\""
#> [2] "call:    not_a_command"                            
#>