Sha256: 59f923902300dc3b0a7dee578b92f6dfbd0f957404a362a751ac53573311be15
Contents?: true
Size: 1.23 KB
Versions: 26
Compression:
Stored size: 1.23 KB
Contents
# frozen_string_literal: true
class Code
class Node
class While < Node
WHILE_KEYWORD = "while"
UNTIL_KEYWORD = "until"
LOOP_KEYWORD = "loop"
def initialize(parsed)
return if parsed.blank?
@operator = parsed.delete(:operator).presence
@statement = Statement.new(parsed.delete(:statement)) if parsed.key?(
:statement
)
@body = Code.new(parsed.delete(:body).presence)
end
def evaluate(**args)
case @operator
when WHILE_KEYWORD
last = Object::Nothing.new
while (@statement&.evaluate(**args) || Object::Nothing.new).truthy?
last = @body&.evaluate(**args) || Object::Nothing.new
end
last
when UNTIL_KEYWORD
last = Object::Nothing.new
while (@statement&.evaluate(**args) || Object::Nothing.new).falsy?
last = @body&.evaluate(**args) || Object::Nothing.new
end
last
when LOOP_KEYWORD
loop { @body&.evaluate(**args) || Object::Nothing.new }
Object::Nothing.new
else
Object::Nothing.new
end
rescue Error::Break => e
e.value || Object::Nothing.new
end
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems