require 'pathname'

class Pathname
	alias +@ to_s

	def chdir &exe
		Dir.chdir self.to_s, &exe
	end
	alias cd chdir

	# copies content of src in self as destination
	def copy src, **opts
		FileUtils.copy_file src.to_s, self.to_s, **opts
	end

	def replace_i
		open 'r+' do |f|
			lines = yield f
			f.truncate 0
			f.pos = 0
			f.puts lines
		end
	end
end

class Symbol
	alias +@ to_s
	def -@
		:"-#{self}"
	end
end

class File
	def reset
		f.truncate 0
		f.pos = 0
	end
end