Turn unevaluated expressions into character strings.
the deparsed expression
This is a simple utility function for R < 4.0.0 to ensure a string
result (character vector of length one),
typically used in name construction, as util_deparse1(substitute(.)).
This avoids a dependency on backports and on R >= 4.0.0.
Other condition_functions:
util_condition_constructor_factory(),
util_error(),
util_find_external_functions_in_stacktrace(),
util_find_first_externally_called_functions_in_stacktrace(),
util_find_indicator_function_in_callers(),
util_message(),
util_warning()