class XMP::StringInputMethod

A custom InputMethod class used by XMP for evaluating string io.

def eof?

Whether there are any expressions left in this printer. 
def eof?
  @exps.empty?
end

def gets

See IO#gets for more information.

Reads the next expression from this printer. 
def gets
  while l = @exps.shift
    next if /^\s+$/ =~ l
    l.concat "\n"
    print @prompt, l
    break
  end
  l
end

def initialize

Creates a new StringInputMethod object 
def initialize
  super
  @exps = []
end

def puts(exps)

doesn't match the previous expression evaluated.
An Encoding::CompatibilityError is raised of the given +exps+'s encoding

Concatenates all expressions in this printer, separated by newlines. 
def puts(exps)
  if @encoding and exps.encoding != @encoding
    enc = Encoding.compatible?(@exps.join("\n"), exps)
    if enc.nil?
      raise Encoding::CompatibilityError, "Encoding in which the passed expression is encoded is not compatible to the preceding's one"
    else
      @encoding = enc
    end
  else
    @encoding = exps.encoding
  end
  @exps.concat exps.split(/\n/)
end