diff options
Diffstat (limited to 'lib/pp.rb')
| -rw-r--r-- | lib/pp.rb | 166 |
1 files changed, 74 insertions, 92 deletions
@@ -88,9 +88,21 @@ PP#pp to print the object. Object#pretty_print_cycled is used when ((|obj|)) is already printed, a.k.a the object reference chain has a cycle. +--- object_group(obj) { ... } + is a convenience method which is same as follows: + + group(1, '#<' + obj.class.name, '>') { ... } + +--- comma_breakable + is a convenience method which is same as follows: + + text ',' + breakable + = Object --- pretty_print(pp) is a default pretty printing method for general objects. + It calls (({pretty_print_instance_variables})) to list instance variables. If (({self})) has a customized (redefined) (({inspect})) method, the result of (({self.inspect})) is used but it obviously has no @@ -102,6 +114,13 @@ PP#pp to print the object. --- pretty_print_cycled(pp) is a default pretty printing method for general objects that are detected as part of a cycle. + +--- pretty_print_instance_variables + is a method to list instance variables used by the default implementation + of (({pretty_print})). + + This method should return an array of names of instance variables as symbols or strings as: + (({[:@a, :@b]})). =end require 'prettyprint' @@ -172,60 +191,45 @@ class PP < PrettyPrint end end + def object_group(obj, &block) + group(1, '#<' + obj.class.name, '>', &block) + end + + def comma_breakable + text ',' + breakable + end + def pp_object(obj) - group { - text '#<' - nest(1) { - text obj.class.name - text ':' - text sprintf('0x%x', obj.__id__) - first = true - obj.instance_variables.sort.each {|v| - if first - first = false - else - text ',' - end - breakable - group { - text v - text '=' - nest(1) { - breakable '' - pp(obj.instance_eval v) - } - } + object_group(obj) { + text sprintf(':0x%x', obj.__id__) + obj.pretty_print_instance_variables.each {|v| + v = v.to_s if Symbol === v + text ',' unless first? + breakable + text v + text '=' + group(1) { + breakable '' + pp(obj.instance_eval v) } } - text '>' } end def pp_hash(obj) - group { - text '{' - nest(1) { - first = true - obj.each {|k, v| - if first - first = false - else - text "," - breakable - end - group { - pp k - text '=>' - nest(1) { - group { - breakable '' - pp v - } - } + group(1, '{', '}') { + obj.each {|k, v| + comma_breakable unless first? + group { + pp k + text '=>' + group(1) { + breakable '' + pp v } } } - text '}' } end @@ -271,6 +275,10 @@ class PP < PrettyPrint pp.breakable pp.text sprintf("...>") end + + def pretty_print_instance_variables + instance_variables.sort + end end end @@ -284,20 +292,12 @@ end class Array def pretty_print(pp) - pp.text "[" - pp.nest(1) { - first = true + pp.group(1, '[', ']') { self.each {|v| - if first - first = false - else - pp.text "," - pp.breakable - end + pp.comma_breakable unless pp.first? pp.pp v } } - pp.text "]" end def pretty_print_cycled(pp) @@ -323,27 +323,18 @@ end class Struct def pretty_print(pp) - pp.text sprintf("#<%s", self.class.name) - pp.nest(1) { - first = true + pp.object_group(self) { self.members.each {|member| - if first - first = false - else - pp.text "," - end + pp.text "," unless pp.first? pp.breakable - pp.group { - pp.text member.to_s - pp.text '=' - pp.nest(1) { - pp.breakable '' - pp.pp self[member] - } + pp.text member.to_s + pp.text '=' + pp.group(1) { + pp.breakable '' + pp.pp self[member] } } } - pp.text ">" end def pretty_print_cycled(pp) @@ -365,12 +356,10 @@ class File class Stat def pretty_print(pp) require 'etc.so' - pp.nest(1) { - pp.text "#<" - pp.text self.class.name - pp.breakable; pp.text sprintf("dev=0x%x", self.dev); pp.text ',' - pp.breakable; pp.text "ino="; pp.pp self.ino; pp.text ',' + pp.object_group(self) { pp.breakable + pp.text sprintf("dev=0x%x", self.dev); pp.comma_breakable + pp.text "ino="; pp.pp self.ino; pp.comma_breakable pp.group { m = self.mode pp.text sprintf("mode=0%o", m) @@ -389,10 +378,9 @@ class File (m & 0002 == 0 ? ?- : ?w), (m & 0001 == 0 ? (m & 01000 == 0 ? ?- : ?T) : (m & 01000 == 0 ? ?x : ?t))) - pp.text ',' } - pp.breakable; pp.text "nlink="; pp.pp self.nlink; pp.text ',' - pp.breakable + pp.comma_breakable + pp.text "nlink="; pp.pp self.nlink; pp.comma_breakable pp.group { pp.text "uid="; pp.pp self.uid begin @@ -400,9 +388,8 @@ class File pp.breakable; pp.text "(#{name})" rescue ArgumentError end - pp.text ',' } - pp.breakable + pp.comma_breakable pp.group { pp.text "gid="; pp.pp self.gid begin @@ -410,39 +397,34 @@ class File pp.breakable; pp.text "(#{name})" rescue ArgumentError end - pp.text ',' } - pp.breakable + pp.comma_breakable pp.group { pp.text sprintf("rdev=0x%x", self.rdev) pp.breakable pp.text sprintf('(%d, %d)', self.rdev_major, self.rdev_minor) - pp.text ',' } - pp.breakable; pp.text "size="; pp.pp self.size; pp.text ',' - pp.breakable; pp.text "blksize="; pp.pp self.blksize; pp.text ',' - pp.breakable; pp.text "blocks="; pp.pp self.blocks; pp.text ',' - pp.breakable + pp.comma_breakable + pp.text "size="; pp.pp self.size; pp.comma_breakable + pp.text "blksize="; pp.pp self.blksize; pp.comma_breakable + pp.text "blocks="; pp.pp self.blocks; pp.comma_breakable pp.group { t = self.atime pp.text "atime="; pp.pp t pp.breakable; pp.text "(#{t.tv_sec})" - pp.text ',' } - pp.breakable + pp.comma_breakable pp.group { t = self.mtime pp.text "mtime="; pp.pp t pp.breakable; pp.text "(#{t.tv_sec})" - pp.text ',' } - pp.breakable + pp.comma_breakable pp.group { t = self.ctime pp.text "ctime="; pp.pp t pp.breakable; pp.text "(#{t.tv_sec})" } - pp.text ">" } end end |