121 lines
2.6 KiB
Lua
121 lines
2.6 KiB
Lua
local tlang = {}
|
|
|
|
dof = dofile
|
|
if minetest ~= nil then
|
|
dof = do_file
|
|
end
|
|
|
|
tlang.lex = dof("tlang_lex.lua")
|
|
tlang.parse = dof("tlang_parse.lua")
|
|
tlang.builtins, tlang.gassign, tlang.step = dof("tlang_vm.lua")
|
|
|
|
-- TODO
|
|
--[[
|
|
lexer should include line/character number in symbols
|
|
error messages
|
|
maps should be able to have out of order number indexes (like [1 2 3 10:"Out of order"])
|
|
map.key accessing syntax
|
|
parse as identifier, include . as identifier character, split on . and thats the indexing tree
|
|
--]]
|
|
|
|
function tlang.run(state)
|
|
while true do
|
|
local more = tlang.step(state)
|
|
if more == true or more == nil then
|
|
-- continue along
|
|
elseif type(more) == "string" then
|
|
print(more) -- error
|
|
elseif more == false then
|
|
return -- done
|
|
else
|
|
print("Unknown error, tlang.step returned: " .. tostring(more))
|
|
end
|
|
end
|
|
end
|
|
|
|
local function assign_many(state, source)
|
|
for k, v in pairs(source) do
|
|
tlang.gassign(state, k, v)
|
|
end
|
|
end
|
|
|
|
-- convert a lua value into a tlang literal
|
|
function tlang.valconv(value)
|
|
local t = type(value)
|
|
if t == "string" then
|
|
return {type = "string", value = value}
|
|
elseif t == "number" then
|
|
return {type = "number", value = value}
|
|
elseif t == "table" then
|
|
local map = {}
|
|
|
|
for k, v in pairs(value) do
|
|
map[k] = tlang.valconv(v)
|
|
end
|
|
|
|
return {type = "map", value = map}
|
|
end
|
|
end
|
|
|
|
function tlang.get_state(code)
|
|
local lexed = tlang.lex(code)
|
|
local parsed = tlang.parse(lexed)
|
|
|
|
return {
|
|
locals = {{
|
|
pc = {sg = 1, pos = "__ast__", elem = 1},
|
|
v__src__ = tlang.valconv(code),
|
|
v__lex__ = tlang.valconv(lexed),
|
|
v__ast__ = {type = "code", value = parsed}}},
|
|
stack = {},
|
|
code_stack = {},
|
|
builtins = tlang.builtins,
|
|
wait_target = nil,
|
|
nextpop = false
|
|
}
|
|
end
|
|
|
|
function tlang.exec(code)
|
|
local state = tlang.get_state(code)
|
|
tlang.run(state)
|
|
end
|
|
|
|
|
|
local complex = [[{dup *} `square =
|
|
-5.42 square
|
|
"Hello, world!" print
|
|
[1 2 3 str:"String"]
|
|
]]
|
|
|
|
local number = "-4.2123"
|
|
|
|
local simple = "{dup *}"
|
|
|
|
local map = "[this:2 that:3]"
|
|
|
|
local square = [[{dup *} `square =
|
|
5 square print]]
|
|
|
|
local square_run = "5 {dup *} run print"
|
|
|
|
local comment_test = "'asd' print # 'aft' print"
|
|
|
|
local forever_test = [[
|
|
5 # iteration count
|
|
{
|
|
dup # duplicate iter count
|
|
print # print countdown
|
|
-- # decrement
|
|
dup 0 == # check if TOS is 0
|
|
{break} if # break if TOS == 0
|
|
}
|
|
forever # run loop
|
|
]]
|
|
|
|
|
|
local stack_test = "5 5 == print"
|
|
|
|
tlang.exec(forever_test)
|
|
|
|
return tlang
|