928 lines
32 KiB
Lua
928 lines
32 KiB
Lua
local re = require('re')
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local lpeg = require('lpeg')
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local utils = require('utils')
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local INDENT = " "
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lpeg.setmaxstack(10000)
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local P, V, S, Cg, C, Cp, B, Cmt
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P, V, S, Cg, C, Cp, B, Cmt = lpeg.P, lpeg.V, lpeg.S, lpeg.Cg, lpeg.C, lpeg.Cp, lpeg.B, lpeg.Cmt
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local NomsuCompiler
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do
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local _class_0
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local _base_0 = {
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writeln = function(self, ...)
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self:write(...)
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return self:write("\n")
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end,
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call = function(self, fn_name, ...)
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local fn_info = self.defs[fn_name]
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if fn_info == nil then
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self:error("Attempt to call undefined function: " .. tostring(fn_name))
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end
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if fn_info.is_macro then
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self:error("Attempt to call macro at runtime: " .. tostring(fn_name) .. "\nThis can be caused by using a macro in a function that is defined before the macro.")
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end
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if not (self:check_permission(fn_name)) then
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self:error("You do not have the authority to call: " .. tostring(fn_name))
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end
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table.insert(self.callstack, fn_name)
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local fn, arg_names
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fn, arg_names = fn_info.fn, fn_info.arg_names
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local args
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do
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local _tbl_0 = { }
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for i, name in ipairs(arg_names[fn_name]) do
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_tbl_0[name] = select(i, ...)
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end
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args = _tbl_0
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end
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if self.debug then
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self:writeln("Calling " .. tostring(fn_name) .. " with args: " .. tostring(utils.repr(args)))
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end
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local ret = fn(self, args)
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table.remove(self.callstack)
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return ret
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end,
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check_permission = function(self, fn_name)
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local fn_info = self.defs[fn_name]
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if fn_info == nil then
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self:error("Undefined function: " .. tostring(fn_name))
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end
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if fn_info.whiteset == nil then
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return true
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end
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local _list_0 = self.callstack
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for _index_0 = 1, #_list_0 do
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local caller = _list_0[_index_0]
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if fn_info.whiteset[caller] then
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return true
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end
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end
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return false
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end,
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def = function(self, spec, fn, src)
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if self.debug then
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self:writeln("Defining rule: " .. tostring(spec))
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end
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local invocations, arg_names = self:get_invocations(spec)
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local fn_info = {
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fn = fn,
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arg_names = arg_names,
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invocations = invocations,
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src = src,
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is_macro = false
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}
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for _index_0 = 1, #invocations do
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local invocation = invocations[_index_0]
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self.defs[invocation] = fn_info
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end
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end,
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get_invocations_from_definition = function(self, def, vars)
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if def.type == "String" then
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return self:tree_to_value(def, vars)
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end
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if def.type ~= "List" then
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error("DEF IS: " .. tostring(utils.repr(def)))
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self:error("Trying to get invocations from " .. tostring(def.type) .. ", but expected List or String.")
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end
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local invocations = { }
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local _list_0 = def.value
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for _index_0 = 1, #_list_0 do
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local _continue_0 = false
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repeat
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local item = _list_0[_index_0]
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if item.type == "String" then
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table.insert(invocations, self:tree_to_value(item, vars))
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_continue_0 = true
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break
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end
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if item.type ~= "FunctionCall" then
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self:error("Invalid list item: " .. tostring(item.type) .. ", expected FunctionCall or String")
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end
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local name_bits = { }
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local _list_1 = item.value
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for _index_1 = 1, #_list_1 do
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local token = _list_1[_index_1]
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if token.type == "Word" then
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table.insert(name_bits, token.value)
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elseif token.type == "Var" then
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table.insert(name_bits, token.src)
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else
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self:error("Unexpected token type in definition: " .. tostring(token.type) .. " (expected Word or Var)")
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end
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end
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table.insert(invocations, table.concat(name_bits, " "))
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_continue_0 = true
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until true
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if not _continue_0 then
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break
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end
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end
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return invocations
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end,
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get_invocations = function(self, text)
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if not text then
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self:error("No text provided!")
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end
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if type(text) == 'function' then
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error("Function passed to get_invocations")
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end
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if type(text) == 'string' then
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text = {
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text
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}
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end
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local invocations = { }
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local arg_names = { }
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local prev_arg_names = nil
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for _index_0 = 1, #text do
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local _text = text[_index_0]
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local invocation = _text:gsub("'", " '"):gsub("%%%S+", "%%"):gsub("%s+", " ")
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local _arg_names
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do
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local _accum_0 = { }
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local _len_0 = 1
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for arg in _text:gmatch("%%(%S[^%s']*)") do
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_accum_0[_len_0] = arg
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_len_0 = _len_0 + 1
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end
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_arg_names = _accum_0
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end
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table.insert(invocations, invocation)
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if prev_arg_names then
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if not utils.equivalent(utils.set(prev_arg_names), utils.set(_arg_names)) then
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self:error("Conflicting argument names " .. tostring(utils.repr(prev_arg_names)) .. " and " .. tostring(utils.repr(_arg_names)) .. " for " .. tostring(utils.repr(text)))
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end
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else
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prev_arg_names = _arg_names
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end
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arg_names[invocation] = _arg_names
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end
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return invocations, arg_names
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end,
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defmacro = function(self, spec, lua_gen_fn, src)
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if self.debug then
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self:writeln("DEFINING MACRO: " .. tostring(spec) .. tostring(src or ""))
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end
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local invocations, arg_names = self:get_invocations(spec)
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local fn_info = {
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fn = lua_gen_fn,
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arg_names = arg_names,
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invocations = invocations,
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src = src,
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is_macro = true
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}
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for _index_0 = 1, #invocations do
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local invocation = invocations[_index_0]
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self.defs[invocation] = fn_info
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end
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end,
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run = function(self, text, filename)
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if self.debug then
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self:writeln("RUNNING TEXT:\n" .. tostring(text))
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end
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local code, retval = self:compile(text, filename)
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if self.debug then
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self:writeln("\nGENERATED LUA CODE:\n" .. tostring(code))
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self:writeln("\nPRODUCED RETURN VALUE:\n" .. tostring(retval))
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end
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return retval
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end,
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serialize = function(self, obj)
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local _exp_0 = type(obj)
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if "function" == _exp_0 then
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error("Function serialization is not yet implemented.")
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return "assert(load(" .. utils.repr(string.dump(obj), true) .. "))"
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elseif "table" == _exp_0 then
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if utils.is_list(obj) then
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return "{" .. tostring(table.concat((function()
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local _accum_0 = { }
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local _len_0 = 1
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for _index_0 = 1, #obj do
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local i = obj[_index_0]
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_accum_0[_len_0] = self:serialize(i)
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_len_0 = _len_0 + 1
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end
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return _accum_0
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end)(), ", ")) .. "}"
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else
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return "{" .. tostring(table.concat((function()
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local _accum_0 = { }
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local _len_0 = 1
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for k, v in pairs(obj) do
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_accum_0[_len_0] = "[" .. tostring(self:serialize(k)) .. "]= " .. tostring(self:serialize(v))
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_len_0 = _len_0 + 1
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end
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return _accum_0
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end)(), ", ")) .. "}"
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end
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elseif "number" == _exp_0 then
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return utils.repr(obj, true)
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elseif "string" == _exp_0 then
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return utils.repr(obj, true)
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else
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return error("Serialization not implemented for: " .. tostring(type(obj)))
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end
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end,
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deserialize = function(self, str)
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local lua_thunk, err = load("return (function(compiler,vars)\n return " .. str .. "\n end)")
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if not lua_thunk then
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error("Failed to compile generated code:\n" .. tostring(str) .. "\n\n" .. tostring(err))
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end
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return (lua_thunk())(self, { })
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end,
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parse = function(self, str, filename)
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if self.debug then
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self:writeln("PARSING:\n" .. tostring(str))
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end
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local get_line_indentation
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get_line_indentation = function(line)
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local indent_amounts = {
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[" "] = 1,
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["\t"] = 4
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}
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do
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local sum = 0
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local leading_space = line:match("[\t ]*")
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for c in leading_space:gmatch("[\t ]") do
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sum = sum + indent_amounts[c]
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end
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return sum
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end
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end
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local indent_stack = {
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0
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}
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local check_indent
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check_indent = function(subject, end_pos, spaces)
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local num_spaces = get_line_indentation(spaces)
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if num_spaces > indent_stack[#indent_stack] then
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table.insert(indent_stack, num_spaces)
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return end_pos
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end
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end
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local check_dedent
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check_dedent = function(subject, end_pos, spaces)
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local num_spaces = get_line_indentation(spaces)
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if num_spaces < indent_stack[#indent_stack] then
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table.remove(indent_stack)
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return end_pos
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end
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end
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local check_nodent
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check_nodent = function(subject, end_pos, spaces)
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local num_spaces = get_line_indentation(spaces)
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if num_spaces == indent_stack[#indent_stack] then
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return end_pos
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end
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end
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local lingo = [=[ file <- ({ {| shebang? {:body: block :} %nl* (({.+} ("" -> "Unexpected end of file")) => error)? |} }) -> File
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shebang <- "#!" [^%nl]* %nl
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block <- ({ {|
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(ignored_line %nl)*
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line_of_statements (nodent line_of_statements)*
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(%nl ignored_line)* |} }) -> Block
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inline_block <- ({ {| inline_line_of_statements |} }) -> Block
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line_of_statements <- statement (%ws? ";" %ws? statement)*
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inline_line_of_statements <- inline_statement (%ws? ";" %ws? inline_statement)*
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statement <- ({ functioncall / expression }) -> Statement
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inline_statement <- ({ inline_functioncall / expression }) -> Statement
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expression <- (
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longstring / string / number / variable / list / thunk / block_functioncall
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/ ("(" %ws? (inline_thunk / inline_functioncall) %ws? ")"))
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-- Function calls need at least one word in them
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functioncall <- ({ {|
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(expression (dotdot / tok_gap))* word ((dotdot / tok_gap) (expression / word))*
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|} }) -> FunctionCall
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inline_functioncall <- ({ {|
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(expression tok_gap)* word (tok_gap (expression / word))*
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|} }) -> FunctionCall
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block_functioncall <- "(..)" indent functioncall (dedent / (({.+} ("" -> "Error while parsing block function call")) => error))
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word <- ({ !number {%wordchar (!"'" %wordchar)*} }) -> Word
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thunk <- ({ ":" ((indent block (dedent / (({.+} ("" -> "Error while parsing thunk")) => error)))
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/ (%ws? inline_block)) }) -> Thunk
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inline_thunk <- ({ ":" %ws? inline_block }) -> Thunk
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string <- ({ (!longstring) '"' {(("\" [^%nl]) / [^"%nl])*} '"' }) -> String
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longstring <- ({ '".."' %ws?
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{| (longstring_line (indent
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longstring_line (nodent longstring_line)*
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(dedent / longstring_error))?)
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/(indent
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longstring_line (nodent longstring_line)*
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(dedent / longstring_error)) |} }) -> Longstring
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longstring_line <- "|" {| ({("\\" / (!string_interpolation [^%nl]))+} / string_interpolation)* |}
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longstring_error <- (({.+} ("" -> "Error while parsing Longstring")) => error)
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string_interpolation <- "\" %ws? (inline_functioncall / expression) %ws? "\"
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number <- ({ {"-"? (([0-9]+ "." [0-9]+) / ("." [0-9]+) / ([0-9]+)) } }) -> Number
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-- Hack to allow %foo's to parse as "%foo" and "'s" separately
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variable <- ({ ("%" {%wordchar (!"'" %wordchar)*}) }) -> Var
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list <- ({ {|
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("[..]" indent
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list_line (nodent list_line)*
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(dedent / (({.+} ("" -> "Error while parsing list")) => error)))
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/("[" %ws? (list_line %ws?)? "]")
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|} }) -> List
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list_line <- list_bit (%ws? "," tok_gap list_bit)* (%ws? ",")?
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list_bit <- inline_functioncall / expression
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block_comment <- "#.." [^%nl]* indent [^%nl]* (%nl ((%ws? (!. / &%nl)) / (!%dedented [^%nl]*)))*
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line_comment <- "#" [^%nl]*
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eol <- %ws? line_comment? (!. / &%nl)
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ignored_line <- (%nodented (block_comment / line_comment)) / (%ws? (!. / &%nl))
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indent <- eol (%nl ignored_line)* %nl %indented
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nodent <- eol (%nl ignored_line)* %nl %nodented
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dedent <- eol (%nl ignored_line)* (((!.) &%dedented) / (&(%nl %dedented)))
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tok_gap <- %ws / %prev_edge / &("[" / [.,:;{("#%'])
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dotdot <- nodent ".." %ws?
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]=]
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local whitespace = S(" \t") ^ 1
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local defs = {
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ws = whitespace,
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nl = P("\n"),
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wordchar = P(1) - S(' \t\n\r%#:;,.{}[]()"\\'),
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indented = Cmt(S(" \t") ^ 0 * (#(P(1) - S(" \t\n") + (-P(1)))), check_indent),
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nodented = Cmt(S(" \t") ^ 0 * (#(P(1) - S(" \t\n") + (-P(1)))), check_nodent),
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dedented = Cmt(S(" \t") ^ 0 * (#(P(1) - S(" \t\n") + (-P(1)))), check_dedent),
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prev_edge = B(S(" \t\n.,:;}])\"")),
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error = function(src, pos, errors, err_msg)
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local line_no = 1
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for _ in src:sub(1, -#errors):gmatch("\n") do
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line_no = line_no + 1
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end
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local err_pos = #src - #errors + 1
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if errors:sub(1, 1) == "\n" then
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err_pos = err_pos + #errors:match("[ \t]*", 2)
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end
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local start_of_err_line = err_pos
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while src:sub(start_of_err_line, start_of_err_line) ~= "\n" and start_of_err_line > 1 do
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start_of_err_line = start_of_err_line - 1
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end
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local start_of_prev_line = start_of_err_line - 1
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while src:sub(start_of_prev_line, start_of_prev_line) ~= "\n" and start_of_prev_line > 1 do
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start_of_prev_line = start_of_prev_line - 1
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end
|
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local prev_line, err_line, next_line
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prev_line, err_line, next_line = src:match("([^\n]*)\n([^\n]*)\n([^\n]*)", start_of_prev_line + 1)
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local pointer = ("-"):rep(err_pos - start_of_err_line + 0) .. "^"
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return error("\n" .. tostring(err_msg or "Parse error") .. " in " .. tostring(filename) .. " on line " .. tostring(line_no) .. ":\n\n" .. tostring(prev_line) .. "\n" .. tostring(err_line) .. "\n" .. tostring(pointer) .. "\n" .. tostring(next_line) .. "\n")
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end
|
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}
|
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setmetatable(defs, {
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__index = function(t, key)
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local fn
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fn = function(src, value, errors)
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local token = {
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type = key,
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src = src,
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value = value,
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errors = errors
|
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}
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return token
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end
|
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t[key] = fn
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return fn
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end
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})
|
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lingo = re.compile(lingo, defs)
|
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local tree = lingo:match(str:gsub("\r", "") .. "\n")
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|
if self.debug then
|
|
self:writeln("\nPARSE TREE:")
|
|
self:print_tree(tree)
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|
end
|
|
assert(tree, "Failed to parse: " .. tostring(str))
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return tree
|
|
end,
|
|
tree_to_value = function(self, tree, vars)
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|
local code = "\n return (function(compiler, vars)\nreturn " .. tostring(self:tree_to_lua(tree)) .. "\nend)"
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|
local lua_thunk, err = load(code)
|
|
if not lua_thunk then
|
|
error("Failed to compile generated code:\n" .. tostring(code) .. "\n\n" .. tostring(err))
|
|
end
|
|
return (lua_thunk())(self, vars or { })
|
|
end,
|
|
tree_to_lua = function(self, tree, kind)
|
|
if kind == nil then
|
|
kind = "Expression"
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|
end
|
|
assert(tree, "No tree provided.")
|
|
if not tree.type then
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|
self:error("Invalid tree: " .. tostring(utils.repr(tree)))
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end
|
|
local indent = ""
|
|
local buffer = { }
|
|
local return_value = nil
|
|
local to_lua
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|
to_lua = function(t, kind)
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|
local ret = self:tree_to_lua(t, kind)
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return ret
|
|
end
|
|
local add
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|
add = function(code)
|
|
return table.insert(buffer, code)
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|
end
|
|
local _exp_0 = tree.type
|
|
if "File" == _exp_0 then
|
|
add([[return (function(compiler, vars)
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|
local ret]])
|
|
local vars = { }
|
|
local _list_0 = tree.value.body.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local statement = _list_0[_index_0]
|
|
local code = to_lua(statement, "Statement")
|
|
local lua_code = "\n return (function(compiler, vars)\n" .. tostring(code) .. "\nend)"
|
|
local lua_thunk, err = load(lua_code)
|
|
if not lua_thunk then
|
|
error("Failed to compile generated code:\n" .. tostring(code) .. "\n\n" .. tostring(err) .. "\n\nProduced by statement:\n" .. tostring(utils.repr(statement)))
|
|
end
|
|
local value = lua_thunk()
|
|
return_value = value(self, vars)
|
|
add(code)
|
|
end
|
|
add([[ return ret
|
|
end)
|
|
]])
|
|
elseif "Block" == _exp_0 then
|
|
local _list_0 = tree.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local statement = _list_0[_index_0]
|
|
add(to_lua(statement))
|
|
end
|
|
elseif "Thunk" == _exp_0 then
|
|
assert(tree.value.type == "Block", "Non-block value in Thunk")
|
|
add([[ (function(compiler, vars)
|
|
local ret
|
|
]] .. to_lua(tree.value) .. "\n" .. [[ return ret
|
|
end)
|
|
]])
|
|
elseif "Statement" == _exp_0 then
|
|
if tree.value.type == "FunctionCall" then
|
|
local name = self:fn_name_from_tree(tree.value)
|
|
if self.defs[name] and self.defs[name].is_macro then
|
|
add(self:run_macro(tree.value, "Statement"))
|
|
else
|
|
add("ret = " .. (to_lua(tree.value):match("%s*(.*)")))
|
|
end
|
|
else
|
|
add("ret = " .. (to_lua(tree.value):match("%s*(.*)")))
|
|
end
|
|
elseif "FunctionCall" == _exp_0 then
|
|
local name = self:fn_name_from_tree(tree)
|
|
if self.defs[name] and self.defs[name].is_macro then
|
|
add(self:run_macro(tree, "Expression"))
|
|
else
|
|
local args
|
|
do
|
|
local _accum_0 = { }
|
|
local _len_0 = 1
|
|
local _list_0 = tree.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local a = _list_0[_index_0]
|
|
if a.type ~= "Word" then
|
|
_accum_0[_len_0] = to_lua(a)
|
|
_len_0 = _len_0 + 1
|
|
end
|
|
end
|
|
args = _accum_0
|
|
end
|
|
table.insert(args, 1, utils.repr(name, true))
|
|
add(self.__class:comma_separated_items("compiler:call(", args, ")"))
|
|
end
|
|
elseif "String" == _exp_0 then
|
|
local escapes = {
|
|
n = "\n",
|
|
t = "\t",
|
|
b = "\b",
|
|
a = "\a",
|
|
v = "\v",
|
|
f = "\f",
|
|
r = "\r"
|
|
}
|
|
local unescaped = tree.value:gsub("\\(.)", (function(c)
|
|
return escapes[c] or c
|
|
end))
|
|
add(utils.repr(unescaped, true))
|
|
elseif "Longstring" == _exp_0 then
|
|
local concat_parts = { }
|
|
local string_buffer = ""
|
|
for i, line in ipairs(tree.value) do
|
|
if i > 1 then
|
|
string_buffer = string_buffer .. "\n"
|
|
end
|
|
for _index_0 = 1, #line do
|
|
local bit = line[_index_0]
|
|
if type(bit) == "string" then
|
|
string_buffer = string_buffer .. bit:gsub("\\\\", "\\")
|
|
else
|
|
if string_buffer ~= "" then
|
|
table.insert(concat_parts, utils.repr(string_buffer, true))
|
|
string_buffer = ""
|
|
end
|
|
table.insert(concat_parts, "compiler.utils.repr(" .. tostring(to_lua(bit)) .. ")")
|
|
end
|
|
end
|
|
end
|
|
if string_buffer ~= "" then
|
|
table.insert(concat_parts, utils.repr(string_buffer, true))
|
|
end
|
|
if #concat_parts == 0 then
|
|
add("''")
|
|
elseif #concat_parts == 1 then
|
|
add(concat_parts[1])
|
|
else
|
|
add("(" .. tostring(table.concat(concat_parts, "..")) .. ")")
|
|
end
|
|
elseif "Number" == _exp_0 then
|
|
add(tree.value)
|
|
elseif "List" == _exp_0 then
|
|
if #tree.value == 0 then
|
|
add("{}")
|
|
elseif #tree.value == 1 then
|
|
add("{" .. tostring(to_lua(tree.value[1])) .. "}")
|
|
else
|
|
add(self.__class:comma_separated_items("{", (function()
|
|
local _accum_0 = { }
|
|
local _len_0 = 1
|
|
local _list_0 = tree.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local item = _list_0[_index_0]
|
|
_accum_0[_len_0] = to_lua(item)
|
|
_len_0 = _len_0 + 1
|
|
end
|
|
return _accum_0
|
|
end)(), "}"))
|
|
end
|
|
elseif "Var" == _exp_0 then
|
|
add("vars[" .. tostring(utils.repr(tree.value, true)) .. "]")
|
|
else
|
|
self:error("Unknown/unimplemented thingy: " .. tostring(tree.type))
|
|
end
|
|
buffer = table.concat(buffer, "\n")
|
|
return buffer, return_value
|
|
end,
|
|
fn_name_from_tree = function(self, tree)
|
|
assert(tree.type == "FunctionCall", "Attempt to get fn name from non-functioncall tree: " .. tostring(tree.type))
|
|
local name_bits = { }
|
|
local _list_0 = tree.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local token = _list_0[_index_0]
|
|
table.insert(name_bits, (function()
|
|
if token.type == "Word" then
|
|
return token.value
|
|
else
|
|
return "%"
|
|
end
|
|
end)())
|
|
end
|
|
return table.concat(name_bits, " ")
|
|
end,
|
|
run_macro = function(self, tree, kind)
|
|
if kind == nil then
|
|
kind = "Expression"
|
|
end
|
|
local name = self:fn_name_from_tree(tree)
|
|
if not (self.defs[name] and self.defs[name].is_macro) then
|
|
self:error("Macro not found: " .. tostring(name))
|
|
end
|
|
if not (self:check_permission(name)) then
|
|
self:error("You do not have the authority to call: " .. tostring(name))
|
|
end
|
|
local fn, arg_names
|
|
do
|
|
local _obj_0 = self.defs[name]
|
|
fn, arg_names = _obj_0.fn, _obj_0.arg_names
|
|
end
|
|
local args
|
|
do
|
|
local _accum_0 = { }
|
|
local _len_0 = 1
|
|
local _list_0 = tree.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local a = _list_0[_index_0]
|
|
if a.type ~= "Word" then
|
|
_accum_0[_len_0] = a
|
|
_len_0 = _len_0 + 1
|
|
end
|
|
end
|
|
args = _accum_0
|
|
end
|
|
do
|
|
local _tbl_0 = { }
|
|
for i, name in ipairs(arg_names[name]) do
|
|
_tbl_0[name] = args[i]
|
|
end
|
|
args = _tbl_0
|
|
end
|
|
table.insert(self.callstack, name)
|
|
local ret, manual_mode = fn(self, args, kind)
|
|
table.remove(self.callstack)
|
|
if not ret then
|
|
self:error("No return value for macro: " .. tostring(name))
|
|
end
|
|
if kind == "Statement" and not manual_mode then
|
|
ret = "ret = " .. ret
|
|
end
|
|
return ret
|
|
end,
|
|
_yield_tree = function(self, tree, indent_level)
|
|
if indent_level == nil then
|
|
indent_level = 0
|
|
end
|
|
local ind
|
|
ind = function(s)
|
|
return INDENT:rep(indent_level) .. s
|
|
end
|
|
local _exp_0 = tree.type
|
|
if "File" == _exp_0 then
|
|
coroutine.yield(ind("File:"))
|
|
self:_yield_tree(tree.value.body, indent_level + 1)
|
|
elseif "Errors" == _exp_0 then
|
|
coroutine.yield(ind("Error:\n" .. tostring(tree.value)))
|
|
elseif "Block" == _exp_0 then
|
|
local _list_0 = tree.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local chunk = _list_0[_index_0]
|
|
self:_yield_tree(chunk, indent_level)
|
|
end
|
|
elseif "Thunk" == _exp_0 then
|
|
coroutine.yield(ind("Thunk:"))
|
|
self:_yield_tree(tree.value, indent_level + 1)
|
|
elseif "Statement" == _exp_0 then
|
|
self:_yield_tree(tree.value, indent_level)
|
|
elseif "FunctionCall" == _exp_0 then
|
|
local name = self:fn_name_from_tree(tree)
|
|
local args
|
|
do
|
|
local _accum_0 = { }
|
|
local _len_0 = 1
|
|
local _list_0 = tree.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local a = _list_0[_index_0]
|
|
if a.type ~= "Word" then
|
|
_accum_0[_len_0] = a
|
|
_len_0 = _len_0 + 1
|
|
end
|
|
end
|
|
args = _accum_0
|
|
end
|
|
if #args == 0 then
|
|
coroutine.yield(ind("Call [" .. tostring(name) .. "]!"))
|
|
else
|
|
coroutine.yield(ind("Call [" .. tostring(name) .. "]:"))
|
|
for _index_0 = 1, #args do
|
|
local a = args[_index_0]
|
|
self:_yield_tree(a, indent_level + 1)
|
|
end
|
|
end
|
|
elseif "String" == _exp_0 then
|
|
coroutine.yield(ind(utils.repr(tree.value, true)))
|
|
elseif "Longstring" == _exp_0 then
|
|
coroutine.yield(ind(utils.repr(tree.value, true)))
|
|
elseif "Number" == _exp_0 then
|
|
coroutine.yield(ind(tree.value))
|
|
elseif "List" == _exp_0 then
|
|
if #tree.value == 0 then
|
|
coroutine.yield(ind("<Empty List>"))
|
|
else
|
|
coroutine.yield(ind("List:"))
|
|
local _list_0 = tree.value
|
|
for _index_0 = 1, #_list_0 do
|
|
local item = _list_0[_index_0]
|
|
self:_yield_tree(item, indent_level + 1)
|
|
end
|
|
end
|
|
elseif "Var" == _exp_0 then
|
|
coroutine.yield(ind("Var[" .. tostring(utils.repr(tree.value)) .. "]"))
|
|
else
|
|
error("Unknown/unimplemented thingy: " .. tostring(tree.type))
|
|
end
|
|
return nil
|
|
end,
|
|
print_tree = function(self, tree)
|
|
for line in coroutine.wrap(function()
|
|
return self:_yield_tree(tree)
|
|
end) do
|
|
self:writeln(line)
|
|
end
|
|
end,
|
|
stringify_tree = function(self, tree)
|
|
local result = { }
|
|
for line in coroutine.wrap(function()
|
|
return self:_yield_tree(tree)
|
|
end) do
|
|
table.insert(result, line)
|
|
end
|
|
return table.concat(result, "\n")
|
|
end,
|
|
compile = function(self, src, filename, output_file)
|
|
if output_file == nil then
|
|
output_file = nil
|
|
end
|
|
if self.debug then
|
|
self:writeln("COMPILING:\n" .. tostring(src))
|
|
end
|
|
local tree = self:parse(src, filename)
|
|
assert(tree, "Tree failed to compile: " .. tostring(src))
|
|
local code, retval = self:tree_to_lua(tree)
|
|
if output_file then
|
|
local output = io.open(output_file, "w")
|
|
output:write(code)
|
|
end
|
|
return code, retval
|
|
end,
|
|
error = function(self, ...)
|
|
self:writeln("ERROR!")
|
|
self:writeln(...)
|
|
self:writeln("Callstack:")
|
|
for i = #self.callstack, 1, -1 do
|
|
self:writeln(" " .. tostring(self.callstack[i]))
|
|
end
|
|
self:writeln(" <top level>")
|
|
self.callstack = { }
|
|
return error()
|
|
end,
|
|
test = function(self, src, filename, expected)
|
|
local i = 1
|
|
while i ~= nil do
|
|
local start, stop = src:find("\n\n", i)
|
|
local test = src:sub(i, start)
|
|
i = stop
|
|
start, stop = test:find("===")
|
|
if not start or not stop then
|
|
self:error("WHERE'S THE ===? in:\n" .. tostring(test))
|
|
end
|
|
local test_src
|
|
test_src, expected = test:sub(1, start - 1), test:sub(stop + 1, -1)
|
|
expected = expected:match('[\n]*(.*[^\n])')
|
|
local tree = self:parse(test_src, filename)
|
|
local got = self:stringify_tree(tree.value.body)
|
|
if got ~= expected then
|
|
self:error("TEST FAILED!\nSource:\n" .. tostring(test_src) .. "\nExpected:\n" .. tostring(expected) .. "\n\nGot:\n" .. tostring(got))
|
|
end
|
|
end
|
|
end,
|
|
initialize_core = function(self)
|
|
local as_lua_code
|
|
as_lua_code = function(self, str, vars)
|
|
local _exp_0 = str.type
|
|
if "String" == _exp_0 then
|
|
return self:tree_to_value(str, vars)
|
|
elseif "Longstring" == _exp_0 then
|
|
return self:tree_to_value(str, vars)
|
|
else
|
|
return self:tree_to_lua(str)
|
|
end
|
|
end
|
|
self:defmacro([[lua block %lua_code]], function(self, vars, kind)
|
|
if kind == "Expression" then
|
|
error("Expected to be in statement.")
|
|
end
|
|
local inner_vars = setmetatable({ }, {
|
|
__index = function(_, key)
|
|
return "vars[" .. tostring(utils.repr(key, true)) .. "]"
|
|
end
|
|
})
|
|
return "do\n" .. self:tree_to_value(vars.lua_code, inner_vars) .. "\nend", true
|
|
end)
|
|
self:defmacro([[lua expr %lua_code]], function(self, vars, kind)
|
|
local lua_code = vars.lua_code.value
|
|
local inner_vars = setmetatable({ }, {
|
|
__index = function(_, key)
|
|
return "vars[" .. tostring(utils.repr(key, true)) .. "]"
|
|
end
|
|
})
|
|
return self:tree_to_value(vars.lua_code, inner_vars)
|
|
end)
|
|
self:def("require %filename", function(self, vars)
|
|
if not self.loaded_files[vars.filename] then
|
|
local file = io.open(vars.filename)
|
|
if not file then
|
|
self:error("File does not exist: " .. tostring(vars.filename))
|
|
end
|
|
self.loaded_files[vars.filename] = self:run(file:read('*a'), vars.filename)
|
|
end
|
|
return self.loaded_files[vars.filename]
|
|
end)
|
|
return self:def("run file %filename", function(self, vars)
|
|
local file = io.open(vars.filename)
|
|
if not file then
|
|
self:error("File does not exist: " .. tostring(vars.filename))
|
|
end
|
|
return self:run(file:read('*a'), vars.filename)
|
|
end)
|
|
end
|
|
}
|
|
_base_0.__index = _base_0
|
|
_class_0 = setmetatable({
|
|
__init = function(self, parent)
|
|
self.write = function(self, ...)
|
|
return io.write(...)
|
|
end
|
|
self.defs = setmetatable({ }, {
|
|
__index = parent and parent.defs
|
|
})
|
|
self.callstack = { }
|
|
self.debug = false
|
|
self:initialize_core()
|
|
self.utils = utils
|
|
self.loaded_files = { }
|
|
end,
|
|
__base = _base_0,
|
|
__name = "NomsuCompiler"
|
|
}, {
|
|
__index = _base_0,
|
|
__call = function(cls, ...)
|
|
local _self_0 = setmetatable({}, _base_0)
|
|
cls.__init(_self_0, ...)
|
|
return _self_0
|
|
end
|
|
})
|
|
_base_0.__class = _class_0
|
|
local self = _class_0
|
|
self.comma_separated_items = function(self, open, items, close)
|
|
return utils.accumulate("\n", function()
|
|
local buffer = open
|
|
local so_far = 0
|
|
for i, item in ipairs(items) do
|
|
if i < #items then
|
|
item = item .. ", "
|
|
end
|
|
if so_far + #item >= 80 and #buffer > 0 then
|
|
coroutine.yield(buffer)
|
|
so_far = so_far - #buffer
|
|
buffer = item
|
|
else
|
|
so_far = so_far + #item
|
|
buffer = buffer .. item
|
|
end
|
|
end
|
|
buffer = buffer .. close
|
|
return coroutine.yield(buffer)
|
|
end)
|
|
end
|
|
NomsuCompiler = _class_0
|
|
end
|
|
if arg and arg[1] then
|
|
local c = NomsuCompiler()
|
|
local input = io.open(arg[1]):read("*a")
|
|
local _write = c.write
|
|
if arg[2] == "-" then
|
|
c.write = function() end
|
|
end
|
|
local code, retval = c:compile(input, arg[1])
|
|
c.write = _write
|
|
if arg[2] then
|
|
local output
|
|
if arg[2] == "-" then
|
|
output = io.output()
|
|
else
|
|
output = io.open(arg[2], 'w')
|
|
end
|
|
output:write([[ local load = function()
|
|
]])
|
|
output:write(code)
|
|
output:write([[
|
|
end
|
|
local NomsuCompiler = require('nomsu')
|
|
local c = NomsuCompiler()
|
|
return load()(c, {})
|
|
]])
|
|
end
|
|
elseif arg then
|
|
local c = NomsuCompiler()
|
|
c:run('require "lib/core.nom"')
|
|
while true do
|
|
local buff = ""
|
|
while true do
|
|
io.write(">> ")
|
|
local line = io.read("*L")
|
|
if line == "\n" or not line then
|
|
break
|
|
end
|
|
buff = buff .. line
|
|
end
|
|
if #buff == 0 then
|
|
break
|
|
end
|
|
local ok, ret = pcall(function()
|
|
return c:run(buff)
|
|
end)
|
|
if ok and ret ~= nil then
|
|
print("= " .. utils.repr(ret, true))
|
|
end
|
|
end
|
|
end
|
|
return NomsuCompiler
|