This is a small wrapper around tryCatch() that captures any
condition signalled while evaluating its argument. It is useful for
situations where you expect a specific condition to be signalled,
for debugging, and for unit testing.
catch_cnd(expr, classes = "condition")
| expr | Expression to be evaluated with a catching condition handler. |
|---|---|
| classes | A character vector of condition classes to catch. By default, catches all conditions. |
A condition if any was signalled, NULL otherwise.
catch_cnd(10)#> NULL#> <error/rlang_error> #> Error: an error #> Backtrace: #> 1. pkgdown::deploy_to_branch(new_process = FALSE) #> 2. pkgdown::build_site(...) #> 3. pkgdown:::build_site_local(...) #> 4. pkgdown::build_reference(...) #> 5. purrr::map(...) #> 6. pkgdown .f(.x[[i]], ...) #> 8. pkgdown:::data_reference_topic(...) #> 9. pkgdown:::run_examples(...) #> 10. pkgdown:::highlight_examples(code, topic, env = env) #> 11. downlit::evaluate_and_highlight(...) #> 12. evaluate::evaluate(code, child_env(env), new_device = TRUE) #> 13. evaluate:::evaluate_call(...) #> 23. [ base::eval(...) ] with 1 more call #> 25. rlang::catch_cnd(abort("an error")) #> 31. base::force(expr)#> <my_condition: a condition>