Sha256: 9a839ee45e263990f639fab63d6b4abdac52f32340c386543dee38d25849c6e2
Contents?: true
Size: 544 Bytes
Versions: 101
Compression:
Stored size: 544 Bytes
Contents
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
push(pop || pop)
end
def active?
@stack[0] == 1
end
def to_s
"[#{@stack.to_s(2)} <= #{@name}]"
end
alias inspect to_s
end
end
Version data entries
101 entries across 101 versions & 5 rubygems