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ohm.rb
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ohm.rb
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require_relative 'lib/components'
require_relative 'lib/smaz'
class Ohm
class Stack < Array
def initialize(ohm, *args)
@ohm = ohm
super(*args)
end
%i(pop last).each do |i|
define_method(i) do |n = 1|
len = length # The length changes after the call to `super`, so we get it first.
result = super(n)
if n > len
(n - len).times {|i| result << @ohm.instance_exec(i, &@ohm.method(:input_access))}
end
result
end
end
end
DEFAULT_VARS = {
# Like 05AB1E, there is an integer counter that can only be incremented (and reset to 0).
counter: 0,
# However, like Jelly, there is only one register that can store any given value.
register: 1,
# These are the default values for the variables that store the index and value of the current element in a loop.
# They correspond to 'N' and 'y' in 05AB1E.
index: 2,
value: 5
}
attr_accessor :counter, :register
attr_reader :broken, :inputs, :safe, :stack, :printed, :vars
# Represents an Ohm circuit.
def initialize(circuit, debug: false, safe: false, top_level: nil, stack: [], inputs: [], vars: DEFAULT_VARS)
@wire = circuit
# This prints the stack and component at each iteration (like 05AB1E).
@debug = debug
# Disables components that perform network requests, etc.
@safe = safe
@top_level = top_level || {wires: split_wires(circuit), index: 0}
raise IndexError, "invalid wire index #{@top_level[:index]}" if @top_level[:wires][@top_level[:index]].nil?
# Accepts either an Ohm::Stack object or an array.
@stack = stack.is_a?(Ohm::Stack) ? stack : Stack.new(self, stack)
@inputs = inputs
@vars = vars
@exit = false
# This is so the interpreter doesn't print the top of stack at the end of execution
@printed = false
@broken = false
end
# Executes circuits given in #initialize.
def exec
puts "\nActive circuit:\n#{@wire}\n\n" if @debug
@pointer = 0
while @pointer < @wire.length
return self if @exit
@component = @wire[@pointer]
comp_hash = COMPONENTS[@component] || {nop: true}
# Check if multi-char component
if comp_hash.keys.all? {|k| k.is_a?(String)}
@component << next_comp = @wire[@pointer += 1]
comp_hash = comp_hash[next_comp]
end
break if @component == "\n" || @component == '¶'
puts "Component: #{@component} || Stack: #{@stack}" if @debug
# Special cases where the behavior can't be described with a concise lambda
# Keyword in that sentence is "concise"
# Otherwise, most of these could _technically_ become lambdas
case @component
# Extended components
when '·Ω'
@stack << find_cycle_component
when '·Θ'
@stack << find_cycle_component.last
# Literals
when /^[0-9]$/ # Number literal
number = @wire[@pointer..@wire.length][/[0-9]+/]
@pointer += number.length - 1
@stack << number
when '.' # Character literal
@stack << @wire[@pointer += 1]
when '‥' # Two-character literal
@pointer += 1
@stack << @wire[@pointer..(@pointer += 1)]
when '…' # Three-character literal
@pointer += 1
@stack << @wire[@pointer..(@pointer += 2)]
when '"' # String literal
@pointer += 1
lit_end = @wire[@pointer..@wire.length].index('"')
lit_end = lit_end.nil? ? @wire.length : lit_end + @pointer
@stack << @wire[@pointer...lit_end].gsub('¶', "\n")
@pointer = lit_end
when '“' # Base-255 number literal
@pointer += 1
lit_end = @wire[@pointer..@wire.length].index('“')
lit_end = lit_end.nil? ? @wire.length : lit_end + @pointer
@stack << from_base(@wire[@pointer...lit_end], BASE_DIGITS.length)
@pointer = lit_end
when '”' # Smaz-compressed string literal
@pointer += 1
lit_end = @wire[@pointer..@wire.length].index('”')
lit_end = lit_end.nil? ? @wire.length : lit_end + @pointer
@stack << Smaz.decompress(@wire[@pointer...lit_end])
@pointer = lit_end
when '᠁'
@pointer += 1
lit_end = @wire[@pointer..@wire.length].index('᠁')
lit_end = lit_end.nil? ? @wire.length : lit_end + @pointer
@stack << ohm_to_bin(@wire[@pointer...lit_end])
@pointer = lit_end
# Miscellaneous
when ']'
@stack.push(*@stack.pop[0])
when 'q' # Quit prematurely
@exit = true
break
# Conditionals/loops
when '?'
@pointer += 1
else_index = outermost_delim(@wire[@pointer..@wire.length], '¿', OPENERS)
else_index += @pointer unless else_index.nil?
cond_end = outermost_delim(@wire[@pointer..@wire.length], ';', OPENERS)
cond_end = cond_end.nil? ? @wire.length : cond_end + @pointer
execute = true
if truthy?(@stack.pop[0])
block_str = @wire[@pointer...(else_index || cond_end)] # Get block string up to else component or end
puts 'Condition is true, executing if block' if @debug
elsif else_index
block_str = @wire[(else_index + 1)...cond_end] # Get block string up to end
puts 'Condition is false, executing else block' if @debug
else
execute = false
puts 'Condition is false, no else clause, skipping to ";" or end' if @debug
end
if execute
block = sub_ohm(block_str).exec
@printed ||= block.printed
@stack = block.stack
@broken = block.broken
end
@pointer = cond_end
when ':'
@pointer += 1
loop_end = outermost_delim(@wire[@pointer..@wire.length], ';', OPENERS)
loop_end = loop_end.nil? ? @wire.length : loop_end + @pointer
popped = @stack.pop[0]
arr_else_chars(popped).each_with_index do |v, i|
new_vars = @vars.clone
new_vars[:value] = v
new_vars[:index] = i
block = sub_ohm(@wire[@pointer...loop_end], vars: new_vars).exec
@printed ||= block.printed
@stack = block.stack
break if block.broken
end
@pointer = loop_end
when 'M'
@pointer += 1
loop_end = outermost_delim(@wire[@pointer..@wire.length], ';', OPENERS)
loop_end = loop_end.nil? ? @wire.length : loop_end + @pointer
popped = @stack.pop[0]
popped.to_i.times do |i|
new_vars = @vars.clone
new_vars[:index] = i
block = sub_ohm(@wire[@pointer...loop_end], vars: new_vars).exec
@printed ||= block.printed
@stack = block.stack
break if block.broken
end
@pointer = loop_end
when '£'
@pointer += 1
loop_end = outermost_delim(@wire[@pointer..@wire.length], ';', OPENERS)
loop_end = loop_end.nil? ? @wire.length : loop_end + @pointer
counter = 0
loop do
new_vars = @vars.clone
new_vars[:index] = counter
block = sub_ohm(@wire[@pointer...loop_end], vars: new_vars).exec
@printed ||= block.printed
@stack = block.stack
break if block.broken
counter += 1
end
@pointer = loop_end
when '¡' # Reduce
@pointer += 1
@component = @wire[@pointer]
# Multi-character component support
@component << @wire[@pointer += 1] if COMPONENTS[@component].keys.all? {|k| k.is_a?(String)}
@stack << @stack.pop[0].reduce do |m, e|
comp = sub_ohm(@component, stack: @stack.clone << m << e).exec
@printed ||= comp.printed
break if comp.broken
comp.stack.last[0]
end
when '¤' # Cumulative reduce
@pointer += 1
@component = @wire[@pointer]
# Multi-character component support
@component << @wire[@pointer += 1] if COMPONENTS[@component].keys.all? {|k| k.is_a?(String)}
head, *tail = @stack.pop[0]
@stack << tail.reduce([head]) do |m, e|
comp = sub_ohm(@component, stack: @stack.clone << m.last << e).exec
@printed ||= comp.printed
break if comp.broken
m << comp.stack.last[0]
end
when '»'
@pointer += 1
@component = @wire[@pointer]
# Multi-character component support
@component << @wire[@pointer += 1] if COMPONENTS[@component].keys.all? {|k| k.is_a?(String)}
@stack << @stack.pop[0].map do |e|
comp = sub_ohm(@component, stack: @stack.clone << e).exec
@printed ||= comp.printed
break if comp.broken
comp.stack.last[0]
end
# Array operations
when '⁇'
arr_operation(:select)
when '⁈'
arr_operation(:partition)
when '‼'
arr_operation(:reject)
when '€'
arr_operation(:map)
when 'ς'
arr_operation(:sort_by)
when '‘'
arr_operation(:min_by)
when '’'
arr_operation(:max_by)
when 'χ'
arr_operation(:minmax_by)
# By default, Enumerable#all? and #any? return a boolean instead of an enumerator if no block was given
# So in order to keep everything DRY, we'll just map over the block and call the method on the resulting array
when 'Å'
arr_operation(:map)
@stack << (@stack.pop[0].all?(&method(:truthy?)) ? 1 : 0)
when 'É'
arr_operation(:map)
@stack << (@stack.pop[0].any?(&method(:truthy?)) ? 1 : 0)
# Special behavior for calling wires
when 'Ψ'
exec_wire_at_index(@top_level[:index])
when 'Φ'
exec_wire_at_index(@stack.pop[0].to_i)
when 'Θ'
exec_wire_at_index(@top_level[:index] - 1)
when 'Ω'
exec_wire_at_index(@top_level[:index] + 1)
# Break statement
when '‽'
if truthy?(@stack.pop[0])
@broken = true
puts 'Breaking out of current wire/block' if @debug
break
end
else
comp_hash ||= {nop: true}
comp_hash[:call] ||= ->{}
args = @stack.method(
comp_hash[:get] ? :last : :pop
).call(comp_hash[:call].arity)
result = exec_component_hash(args, comp_hash) unless comp_hash[:unsafe] && @safe
unless result.nil?
if comp_hash[:multi]
@stack.push(*result)
else
@stack << result
end
end
end
@pointer += 1
end
self
end
end