Translate integer exit code to human readable form. All package functions
return an integer exit code on error rather than the expected return
value. These are classed 'errorValue' and may be checked by the function
is_error_value.
nng_error(xc)integer exit code to translate.
A character vector.
A warning is generated every time an 'errorValue' is returned.
nano_init may be used to set the value of option 'warn' and
automatically reverts it upon package unload. The default, applied by
calling nano_init() with no arguments, is 'immediate', which prints
warnings as they occur.
Further options for warnings may be set manually via options:
warning.expression - an R code expression to be called if a warning is generated, replacing the standard message. If non-null it is called irrespective of the value of option warn.
warning.length - sets the truncation limit in bytes for error and warning messages. A non-negative integer, with allowed values 100...8170, default 1000.
nwarnings - the limit for the number of warnings kept when warn = 0, default 50. This will discard messages if called whilst they are being collected. If you increase this limit, be aware that the current implementation pre-allocates the equivalent of a named list for them.