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Contents
# Require this file to get a node pretty-printer.
#
require 'internal/node'
require 'internal/vm'
require 'pp'
module Noex
# Return a string representing the given integer as a noex value.
#
def stringify(noex)
Noex.constants.each do |constant|
return constant.to_s if const_get(constant) == noex
end
return noex.to_s
end
module_function :stringify
end
class Node
# Return a string containing an ascii-art tree of the node's
# structure.
#
def tree(s = '', prefix = '')
s << "NODE_#{self.nd_type.to_s} at #{self.nd_file}:#{self.nd_line}\n"
self.members.each_with_index do |member, idx|
last = (idx == self.members.size-1)
s << "#{prefix}#{(last ? '+-' : '|-')}#{member} = "
value = self[member]
if Node === value then
value.tree(s, prefix + (last ? ' ' : '| '))
elsif defined?(RubyVM) and
defined?(RubyVM::InstructionSequence) and
RubyVM::InstructionSequence === value then
s << "<ISeq:#{value.self.name}@#{value.self.filename}>\n"
d = value.disasm
lines = d.split("\n")
lines.each_with_index do |line, line_idx|
if line =~ /^== disasm: (.*?)=/ then line = $1; end
if line =~ /(.*)\s+\(\s*\d+\)/ then line = $1; end
next if line =~ /^\|-----/
last_line = (line_idx == lines.size-1)
s << "#{prefix}#{last ? ' ' : '| '}#{(last_line ? '+-' : '|-')}#{line}\n"
end
# p value.local_table
elsif member == 'noex' then
s << Noex.stringify(value) + "\n"
else
s << value.inspect + "\n"
end
end
return s
end
# Pretty-print node using Node#tree onto s, which can be a String or
# IO.
#
def pretty_print(pp)
pp.text(tree())
end
end
if __FILE__ == $0 then
def foo # :nodoc:
1 + 1
end
m = method(:foo)
n = m.body
puts n.pretty_print
end
Version data entries
11 entries across 11 versions & 1 rubygems