# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 157
def check_inspect_key(id)
Thread.current[:__recursive_key__] &&
Thread.current[:__recursive_key__][:inspect] &&
Thread.current[:__recursive_key__][:inspect].include?(id)
end
Check whether the object_id id is in the current buffer of objects to be pretty printed. Used to break cycles in chains of objects to be pretty printed.
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 214
def comma_breakable
text ','
breakable
end
A convenience method which is same as follows:
text ',' breakable
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 135
def guard_inspect_key
if Thread.current[:__recursive_key__] == nil
Thread.current[:__recursive_key__] = {}.taint
end
if Thread.current[:__recursive_key__][:inspect] == nil
Thread.current[:__recursive_key__][:inspect] = {}.taint
end
save = Thread.current[:__recursive_key__][:inspect]
begin
Thread.current[:__recursive_key__][:inspect] = {}.taint
yield
ensure
Thread.current[:__recursive_key__][:inspect] = save
end
end
Yields to a block and preserves the previous set of objects being printed.
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 204
def object_address_group(obj, &block)
str = Kernel.instance_method(:to_s).bind(obj).call
str.chomp!('>')
group(1, str, '>', &block)
end
A convenience method, like object_group, but also reformats the Object’s object_id.
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 198
def object_group(obj, &block) # :yield:
group(1, '#<' + obj.class.name, '>', &block)
end
A convenience method which is same as follows:
group(1, '#<' + obj.class.name, '>') { ... }
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 170
def pop_inspect_key(id)
Thread.current[:__recursive_key__][:inspect].delete id
end
Removes an object from the set of objects being pretty printed.
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 179
def pp(obj)
id = obj.object_id
if check_inspect_key(id)
group {obj.pretty_print_cycle self}
return
end
begin
push_inspect_key(id)
group {obj.pretty_print self}
ensure
pop_inspect_key(id) unless PP.sharing_detection
end
end
Adds obj to the pretty printing buffer using Object#pretty_print or Object#pretty_print_cycle.
Object#pretty_print_cycle is used when obj is already printed, a.k.a the object reference chain has a cycle.
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 273
def pp_hash(obj)
group(1, '{', '}') {
seplist(obj, nil, :each_pair) {|k, v|
group {
pp k
text '=>'
group(1) {
breakable ''
pp v
}
}
}
}
end
A pretty print for a Hash
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 257
def pp_object(obj)
object_address_group(obj) {
seplist(obj.pretty_print_instance_variables, lambda { text ',' }) {|v|
breakable
v = v.to_s if Symbol === v
text v
text '='
group(1) {
breakable ''
pp(obj.instance_eval(v))
}
}
}
end
A present standard failsafe for pretty printing any given Object
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 165
def push_inspect_key(id)
Thread.current[:__recursive_key__][:inspect][id] = true
end
Adds the object_id id to the set of objects being pretty printed, so as to not repeat objects.
# File tmp/rubies/ruby-2.3.8/lib/pp.rb, line 243
def seplist(list, sep=nil, iter_method=:each) # :yield: element
sep ||= lambda { comma_breakable }
first = true
list.__send__(iter_method) {|*v|
if first
first = false
else
sep.call
end
yield(*v)
}
end
Adds a separated list. The list is separated by comma with breakable space, by default.
seplist iterates the list using iter_method. It yields each object to the block given for seplist. The procedure separator_proc is called between each yields.
If the iteration is zero times, separator_proc is not called at all.
If separator_proc is nil or not given, +lambda { comma_breakable }+ is used. If iter_method is not given, :each is used.
For example, following 3 code fragments has similar effect.
q.seplist([1,2,3]) {|v| xxx v } q.seplist([1,2,3], lambda { q.comma_breakable }, :each) {|v| xxx v } xxx 1 q.comma_breakable xxx 2 q.comma_breakable xxx 3