def self.build_completion_proc(target, commands=[""])
proc do |input|
bind = target
case input
when /^(\/[^\/]*\/)\.([^.]*)$/
receiver = $1
message = Regexp.quote($2)
candidates = Regexp.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates)
when /^([^\]]*\])\.([^.]*)$/
receiver = $1
message = Regexp.quote($2)
candidates = Array.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates)
when /^([^\}]*\})\.([^.]*)$/
receiver = $1
message = Regexp.quote($2)
candidates = Proc.instance_methods.collect{|m| m.to_s}
candidates |= Hash.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates)
when /^(:[^:.]*)$/
if Symbol.respond_to?(:all_symbols)
sym = $1
candidates = Symbol.all_symbols.collect{|s| ":" + s.id2name}
candidates.grep(/^#{sym}/)
else
[]
end
when /^::([A-Z][^:\.\(]*)$/
receiver = $1
candidates = Object.constants.collect{|m| m.to_s}
candidates.grep(/^#{receiver}/).collect{|e| "::" + e}
when /^([A-Z].*)::([^:.]*)$/
receiver = $1
message = Regexp.quote($2)
begin
candidates = eval("#{receiver}.constants.collect{|m| m.to_s}", bind)
candidates |= eval("#{receiver}.methods.collect{|m| m.to_s}", bind)
rescue RescuableException
candidates = []
end
candidates.grep(/^#{message}/).collect{|e| receiver + "::" + e}
when /^(:[^:.]+)\.([^.]*)$/
receiver = $1
message = Regexp.quote($2)
candidates = Symbol.instance_methods.collect{|m| m.to_s}
select_message(receiver, message, candidates)
when /^(-?(0[dbo])?[0-9_]+(\.[0-9_]+)?([eE]-?[0-9]+)?)\.([^.]*)$/
receiver = $1
message = Regexp.quote($5)
begin
candidates = eval(receiver, bind).methods.collect{|m| m.to_s}
rescue RescuableException
candidates = []
end
select_message(receiver, message, candidates)
when /^(-?0x[0-9a-fA-F_]+)\.([^.]*)$/
receiver = $1
message = Regexp.quote($2)
begin
candidates = eval(receiver, bind).methods.collect{|m| m.to_s}
rescue RescuableException
candidates = []
end
select_message(receiver, message, candidates)
when /^(\$[^.]*)$/
regmessage = Regexp.new(Regexp.quote($1))
candidates = global_variables.collect{|m| m.to_s}.grep(regmessage)
when /^([^."].*)\.([^.]*)$/
receiver = $1
message = Regexp.quote($2)
gv = eval("global_variables", bind).collect{|m| m.to_s}
lv = eval("local_variables", bind).collect{|m| m.to_s}
cv = eval("self.class.constants", bind).collect{|m| m.to_s}
if (gv | lv | cv).include?(receiver) or /^[A-Z]/ =~ receiver && /\./ !~ receiver
begin
candidates = eval("#{receiver}.methods", bind).collect{|m| m.to_s}
rescue RescuableException
candidates = []
end
else
candidates = []
ObjectSpace.each_object(Module){|m|
begin
name = m.name.to_s
rescue RescuableException
name = ""
end
next if name != "IRB::Context" and
/^(IRB|SLex|RubyLex|RubyToken)/ =~ name
candidates.concat m.instance_methods(false).collect{|x| x.to_s}
}
candidates.sort!
candidates.uniq!
end
select_message(receiver, message, candidates)
when /^\.([^.]*)$/
receiver = ""
message = Regexp.quote($1)
candidates = String.instance_methods(true).collect{|m| m.to_s}
select_message(receiver, message, candidates)
else
candidates = eval("methods | private_methods | local_variables | self.class.constants", bind).collect{|m| m.to_s}
(candidates|ReservedWords|commands).grep(/^#{Regexp.quote(input)}/)
end
end
end