luneur.lua
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local net, live = {}, {}
local function neuron(name)
if not net[name] then
net[name] = {
name = name,
alive = false, sleep = false,
arity = 0, saturation = 0,
excite = {},
inhibit = {},
}
end
return net[name]
end
local function tokenize(program)
local tokens, current_token = {}, {}
for char in program:gmatch(".") do
if char:match "%s" then
current_token = {}
elseif char:match "[:;.]" then
current_token = {}
table.insert(tokens, char)
elseif char == "*" then
if #current_token ~= 0 then
table.insert(tokens, table.concat(current_token))
current_token = {}
end
else
table.insert(current_token, char)
end
end
return tokens
end
local function connect_neurons(lhs, rhs, inhibit)
for _, left in ipairs(lhs) do
for _, right in ipairs(rhs) do
if inhibit then table.insert(left.inhibit, right)
else table.insert(left.excite, right)
end
if not right.alive then
right.arity, right.alive = #lhs, true
end
end
end
end
local function parse(tokens)
local is_right, inhibit, chaining = false, false, false
local lhs, rhs = {}, {}
for _, token in ipairs(tokens) do
if token == ":" or token == ";" then
is_right = not is_right
if chaining then
if is_right then
connect_neurons(rhs, lhs, inhibit) ; rhs = {}
else
connect_neurons(lhs, rhs, inhibit) ; lhs = {}
end
end
chaining = true
inhibit = token == ";"
elseif token == "." then
if not chaining then
for _, left in ipairs(lhs) do
left.alive = true
table.insert(live, left)
end
elseif is_right then
connect_neurons(lhs, rhs, inhibit)
else
connect_neurons(rhs, lhs, inhibit)
end
lhs, rhs, is_right, inhibit, chaining = {}, {}, false, false, false
elseif is_right then
table.insert(rhs, neuron(token))
else
table.insert(lhs, neuron(token))
end
end
return net
end
local function step(count)
local excited, dirty = {}, {}
-- io.write(("%02d "):format(count))
for _, neuron in ipairs(live) do
-- io.write(("%s/%d "):format(neuron.name, neuron.arity))
if neuron.arity == 0 then
table.insert(excited, neuron)
end
for _, inhibit_neuron in ipairs(neuron.inhibit) do
inhibit_neuron.sleep = true
table.insert(dirty, inhibit_neuron)
end
for _, excited_neuron in ipairs(neuron.excite) do
excited_neuron.saturation = excited_neuron.saturation + 1
table.insert(dirty, excited_neuron)
if excited_neuron.saturation == excited_neuron.arity then
table.insert(excited, excited_neuron)
end
end
end
-- io.write("\n")
live = {}
for _, excited_neuron in ipairs(excited) do
if not excited_neuron.sleep then
table.insert(live, excited_neuron)
if excited_neuron.hook then
excited_neuron.hook(live)
end
end
end
for _, dirty_neuron in ipairs(dirty) do
dirty_neuron.saturation = 0
dirty_neuron.sleep = false
end
return #live ~= 0
end
parse(tokenize [[
init*; init*: signal*.
The signal* will fire once:
and activate the cat* program.
cat* tiggers a: read* from standard io.
no-input* prevents another;
no-input* means the program is:
done*.
if there character-read*;
consume the character-read* event:
then write* to standard io.
if there was a write*: then read*.
init* my program.
]])
local char = nil
net["read"].hook = function(live)
char = io.read(1)
if not char then
table.insert(live, net["no-input"])
else
table.insert(live, net["character-read"])
end
end
net["write"].hook = function(live)
io.write(char)
end
local count = 0
while step(count) and count < 0x30 do count = count + 1 end
| 1 | local net, live = {}, {} |
| 2 | |
| 3 | local function neuron(name) |
| 4 | if not net[name] then |
| 5 | net[name] = { |
| 6 | name = name, |
| 7 | alive = false, sleep = false, |
| 8 | arity = 0, saturation = 0, |
| 9 | excite = {}, |
| 10 | inhibit = {}, |
| 11 | } |
| 12 | end |
| 13 | return net[name] |
| 14 | end |
| 15 | |
| 16 | local function tokenize(program) |
| 17 | local tokens, current_token = {}, {} |
| 18 | for char in program:gmatch(".") do |
| 19 | if char:match "%s" then |
| 20 | current_token = {} |
| 21 | elseif char:match "[:;.]" then |
| 22 | current_token = {} |
| 23 | table.insert(tokens, char) |
| 24 | elseif char == "*" then |
| 25 | if #current_token ~= 0 then |
| 26 | table.insert(tokens, table.concat(current_token)) |
| 27 | current_token = {} |
| 28 | end |
| 29 | else |
| 30 | table.insert(current_token, char) |
| 31 | end |
| 32 | end |
| 33 | return tokens |
| 34 | end |
| 35 | |
| 36 | local function connect_neurons(lhs, rhs, inhibit) |
| 37 | for _, left in ipairs(lhs) do |
| 38 | for _, right in ipairs(rhs) do |
| 39 | if inhibit then table.insert(left.inhibit, right) |
| 40 | else table.insert(left.excite, right) |
| 41 | end |
| 42 | if not right.alive then |
| 43 | right.arity, right.alive = #lhs, true |
| 44 | end |
| 45 | end |
| 46 | end |
| 47 | end |
| 48 | |
| 49 | local function parse(tokens) |
| 50 | local is_right, inhibit, chaining = false, false, false |
| 51 | local lhs, rhs = {}, {} |
| 52 | for _, token in ipairs(tokens) do |
| 53 | if token == ":" or token == ";" then |
| 54 | is_right = not is_right |
| 55 | if chaining then |
| 56 | if is_right then |
| 57 | connect_neurons(rhs, lhs, inhibit) ; rhs = {} |
| 58 | else |
| 59 | connect_neurons(lhs, rhs, inhibit) ; lhs = {} |
| 60 | end |
| 61 | end |
| 62 | chaining = true |
| 63 | inhibit = token == ";" |
| 64 | elseif token == "." then |
| 65 | if not chaining then |
| 66 | for _, left in ipairs(lhs) do |
| 67 | left.alive = true |
| 68 | table.insert(live, left) |
| 69 | end |
| 70 | elseif is_right then |
| 71 | connect_neurons(lhs, rhs, inhibit) |
| 72 | else |
| 73 | connect_neurons(rhs, lhs, inhibit) |
| 74 | end |
| 75 | lhs, rhs, is_right, inhibit, chaining = {}, {}, false, false, false |
| 76 | elseif is_right then |
| 77 | table.insert(rhs, neuron(token)) |
| 78 | else |
| 79 | table.insert(lhs, neuron(token)) |
| 80 | end |
| 81 | end |
| 82 | return net |
| 83 | end |
| 84 | |
| 85 | local function step(count) |
| 86 | local excited, dirty = {}, {} |
| 87 | -- io.write(("%02d "):format(count)) |
| 88 | for _, neuron in ipairs(live) do |
| 89 | -- io.write(("%s/%d "):format(neuron.name, neuron.arity)) |
| 90 | if neuron.arity == 0 then |
| 91 | table.insert(excited, neuron) |
| 92 | end |
| 93 | |
| 94 | for _, inhibit_neuron in ipairs(neuron.inhibit) do |
| 95 | inhibit_neuron.sleep = true |
| 96 | table.insert(dirty, inhibit_neuron) |
| 97 | end |
| 98 | |
| 99 | for _, excited_neuron in ipairs(neuron.excite) do |
| 100 | excited_neuron.saturation = excited_neuron.saturation + 1 |
| 101 | table.insert(dirty, excited_neuron) |
| 102 | if excited_neuron.saturation == excited_neuron.arity then |
| 103 | table.insert(excited, excited_neuron) |
| 104 | end |
| 105 | end |
| 106 | end |
| 107 | -- io.write("\n") |
| 108 | live = {} |
| 109 | for _, excited_neuron in ipairs(excited) do |
| 110 | if not excited_neuron.sleep then |
| 111 | table.insert(live, excited_neuron) |
| 112 | if excited_neuron.hook then |
| 113 | excited_neuron.hook(live) |
| 114 | end |
| 115 | end |
| 116 | end |
| 117 | |
| 118 | for _, dirty_neuron in ipairs(dirty) do |
| 119 | dirty_neuron.saturation = 0 |
| 120 | dirty_neuron.sleep = false |
| 121 | end |
| 122 | |
| 123 | return #live ~= 0 |
| 124 | end |
| 125 | |
| 126 | parse(tokenize [[ |
| 127 | init*; init*: signal*. |
| 128 | |
| 129 | The signal* will fire once: |
| 130 | and activate the cat* program. |
| 131 | |
| 132 | cat* tiggers a: read* from standard io. |
| 133 | |
| 134 | no-input* prevents another; |
| 135 | no-input* means the program is: |
| 136 | done*. |
| 137 | |
| 138 | if there character-read*; |
| 139 | consume the character-read* event: |
| 140 | then write* to standard io. |
| 141 | |
| 142 | if there was a write*: then read*. |
| 143 | |
| 144 | init* my program. |
| 145 | ]]) |
| 146 | |
| 147 | |
| 148 | local char = nil |
| 149 | net["read"].hook = function(live) |
| 150 | char = io.read(1) |
| 151 | if not char then |
| 152 | table.insert(live, net["no-input"]) |
| 153 | else |
| 154 | table.insert(live, net["character-read"]) |
| 155 | end |
| 156 | end |
| 157 | |
| 158 | net["write"].hook = function(live) |
| 159 | io.write(char) |
| 160 | end |
| 161 | |
| 162 | local count = 0 |
| 163 | while step(count) and count < 0x30 do count = count + 1 end |