Helper function to convert assert statements into checks

Tries to execute an expression. Internally, this is used to see whether assertions fail when checking inputs (i.e. to convert an assert_*() statement into a check). If the expression fails, the error message is returned. If the expression succeeds, TRUE is returned.

Usage

check_try(expr)

Arguments

expr

an expression to be evaluated

Value

Returns TRUE if the check was successful and a string with an error message otherwise.