44 lines
1.1 KiB
Ruby
44 lines
1.1 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class Pry
|
|
class Command
|
|
class WatchExpression
|
|
class Expression
|
|
attr_reader :target, :source, :value, :previous_value, :pry_instance
|
|
|
|
def initialize(pry_instance, target, source)
|
|
@pry_instance = pry_instance
|
|
@target = target
|
|
@source = Code.new(source).strip
|
|
end
|
|
|
|
def eval!
|
|
@previous_value = value
|
|
@value = Pry::ColorPrinter.pp(target_eval(target, source), ''.dup)
|
|
end
|
|
|
|
def to_s
|
|
"#{Code.new(source).highlighted.strip} => #{value}"
|
|
end
|
|
|
|
# Has the value of the expression changed?
|
|
#
|
|
# We use the pretty-printed string representation to detect differences
|
|
# as this avoids problems with dup (causes too many differences) and ==
|
|
# (causes too few)
|
|
def changed?
|
|
(value != previous_value)
|
|
end
|
|
|
|
private
|
|
|
|
def target_eval(target, source)
|
|
target.eval(source)
|
|
rescue StandardError => e
|
|
e
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|