catch_cnd: Catch a condition

In hadley/rlang: Functions for Base Types and Core R and 'Tidyverse' Features

Catch a condition

Description

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.

Usage

catch_cnd(expr, classes = "condition")

Arguments

expr	Expression to be evaluated with a catching condition handler.
classes	A character vector of condition classes to catch. By default, catches all conditions.

Value

A condition if any was signalled, NULL otherwise.

Examples

catch_cnd(10)
catch_cnd(abort("an error"))
catch_cnd(signal("my_condition", message = "a condition"))

hadley/rlang documentation built on Dec. 17, 2024, 3:26 a.m.