rlang (version 1.1.0)

catch_cnd: 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")

Value

A condition if any was signalled, NULL otherwise.

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.

Examples

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