The verbose level can be represented by non-negative integers. The larger the number is, the more verbose is the program: it prints then more messages for users' information.
verbose(..., global = 1L, this = 1L)Messages to be printed, will be passed to the message
function
Integer, the global verbose level
Integer, the verbose level of this message
The function is used for its side effect by printing messages.
This function decides whether or not to print a message, dependent on the global verbose level and the specific level of the message. If the specific level is larger than the global level, the message is suppresed; otherwise it is printed. see the details section for an example.
Suppose the global verbose level is set to 5, and two messages have
levels of 1 and 7 repsectively. Since 1 suggests a
low-threshold of being verbose, the first message is printed; whereas the
message of level 7 is only printed when the program should run in a
more verbose way (7,8,9,...{}), it is suppressed in the current
global verbose level.
Gv <- 5L
verbose("Slightly verbosing", global=Gv, this=1L)
#> Slightly verbosing
verbose("Moderately verbosing", global=Gv, this=5L)
#> Moderately verbosing
verbose("Heavily verbosing", global=Gv, this=9L)