Class: XMP
Relationships & Source Files | |
Namespace Children | |
Classes:
| |
Inherits: | Object |
Defined in: | lib/irb/xmp.rb |
Overview
An example printer for irb.
It's much like the standard library PrettyPrint, that shows the value of each expression as it runs.
In order to use this library, you must first require it:
require 'irb/xmp'
Now, you can take advantage of the Object#xmp
convenience method.
xmp <<END
foo = "bar"
baz = 42
END
#=> foo = "bar"
#==>"bar"
#=> baz = 42
#==>42
You can also create an XMP
object, with an optional binding to print expressions in the given binding:
ctx = binding
x = XMP.new ctx
x.puts
#=> today = "a good day"
#==>"a good day"
ctx.eval 'today # is what?'
#=> "a good day"
Class Method Summary
-
.new(bind = nil) ⇒ XMP
constructor
Creates a new
XMP
object.
Instance Method Summary
-
#puts(exps)
Evaluates the given
exps
, for example:
Constructor Details
.new(bind = nil) ⇒ XMP
Creates a new XMP
object.
The top-level binding or, optional bind
parameter will be used when creating the workspace. See WorkSpace.new
for more information.
This uses the :XMP
prompt mode, see IRB@Customizing+the+IRB+Prompt for full detail.
# File 'lib/irb/xmp.rb', line 55
def initialize(bind = nil) IRB.init_config(nil) IRB.conf[:PROMPT_MODE] = :XMP bind = IRB::Frame.top(1) unless bind ws = IRB::WorkSpace.new(bind) @io = StringInputMethod.new @irb = IRB::Irb.new(ws, @io) @irb.context.ignore_sigint = false IRB.conf[:MAIN_CONTEXT] = @irb.context end
Instance Method Details
#puts(exps)
Evaluates the given exps
, for example:
require 'irb/xmp'
x = XMP.new
x.puts '{:a => 1, :b => 2, :c => 3}'
#=> {:a => 1, :b => 2, :c => 3}
# ==>{:a=>1, :b=>2, :c=>3}
x.puts 'foo = "bar"'
# => foo = "bar"
# ==>"bar"
# File 'lib/irb/xmp.rb', line 80
def puts(exps) @io.puts exps if @irb.context.ignore_sigint begin trap_proc_b = trap("SIGINT"){@irb.signal_handle} catch(:IRB_EXIT) do @irb.eval_input end ensure trap("SIGINT", trap_proc_b) end else catch(:IRB_EXIT) do @irb.eval_input end end end