Sha256: 6c4b455a2961afcfa57e2508d2d2f927d9f1b509c6bf3b6796a2de9b9bcdde59
Contents?: true
Size: 661 Bytes
Versions: 6966
Compression:
Stored size: 661 Bytes
Contents
# frozen_string_literal: true
module Parser
class Lexer::StackState
def initialize(name)
@name = name.freeze
clear
end
def clear
@stack = 0
end
def push(bit)
bit_value = bit ? 1 : 0
@stack = (@stack << 1) | bit_value
bit
end
def pop
bit_value = @stack & 1
@stack >>= 1
bit_value == 1
end
def lexpop
@stack = ((@stack >> 1) | (@stack & 1))
@stack[0] == 1
end
def active?
@stack[0] == 1
end
def empty?
@stack == 0
end
def to_s
"[#{@stack.to_s(2)} <= #{@name}]"
end
alias inspect to_s
end
end
Version data entries
6,966 entries across 6,943 versions & 49 rubygems