#
This File contains actions for making actions and compile-time actions and some helper
functions to make that easier.
# Compile-time action to make compile-time actions:
immediately
lua> ".."
A_give_1_nickname_2 = compile_time(function(tree, \%action, \%nickname, is_compile_time)
local function arg_to_string(a) return tostring(nomsu:tree_to_lua(a)) end
local action_args = table.map(\%action:get_args(), arg_to_string)
local nickname_args = table.map(\%nickname:get_args(), arg_to_string)
if utils.equivalent(action_args, nickname_args) then
return Lua(tree.source, "A", string.as_lua_id(\%nickname.stub), " = A", string.as_lua_id(\%action.stub))
end
local lua = Lua(tree.source, "A", string.as_lua_id(\%nickname.stub), " = ")
if is_compile_time or COMPILE_TIME[_ENV["A"..string.as_lua_id(\%action.stub)]] then
lua:append("compile_time")
table.insert(action_args, 1, "tree")
table.insert(nickname_args, 1, "tree")
end
lua:append("(function(")
lua:concat_append(nickname_args, ", ")
lua:append(")\n return A", string.as_lua_id(\%action.stub), "(")
lua:concat_append(action_args, ", ")
lua:append(")\nend)")
return lua
end)
__MANGLE_INDEX = 0
A_parse_1_as_2 = compile_time(function(tree, \%actions, \%body)
local replacements = {}
for i,arg in ipairs(\%actions[1]:get_args()) do
replacements[arg[1]] = tostring(nomsu:tree_to_lua(arg))
end
local function make_tree(t)
if not AST.is_syntax_tree(t) then
return repr(t)
elseif t.type ~= 'Var' then
local args = table.map(t, make_tree)
table.insert(args, 1, repr(tostring(t.source)))
return t.type.."("..table.concat(args, ", ")..")"
elseif replacements[t[1]] then
return replacements[t[1]]
else
return t.type.."("..repr(tostring(t.source))..", "..repr(t[1].." \\0").."..('%X'):format(__MANGLE_INDEX))"
end
end
local lua = Lua(tree.source, "A", string.as_lua_id(\%actions[1].stub), " = compile_time(function(tree")
for _,arg in ipairs(\%actions[1]:get_args()) do
lua:append(", ", nomsu:tree_to_lua(arg))
end
lua:append(")\n __MANGLE_INDEX = __MANGLE_INDEX + 1",
"\n local tree = ", make_tree(\%body),
"\n local lua = nomsu:tree_to_lua(tree)",
"\n lua:remove_free_vars({")
local vars = table.map(\%actions[1]:get_args(), function(a)
return "Var("..repr(tostring(a.source))..", "..repr(a[1])..")"
end)
lua:concat_append(vars, ", ")
lua:append("})\n return lua\nend)")
for i=2,#\%actions do
lua:append("\n", A_give_1_nickname_2(\%actions[i], \%actions[1], \%actions[i], true))
end
return lua
end)
A_action_1_2 = compile_time(function(tree, \%actions, \%body, is_compile_time)
local lua = Lua(tree.source, "A", string.as_lua_id(\%actions[1].stub), " = ")
if is_compile_time then lua:append("compile_time") end
lua:append("(function(")
local args = \%actions[1]:get_args()
local lua_args = table.map(args, function(a) return nomsu:tree_to_lua(a) end)
if is_compile_time then table.insert(lua_args, 1, "tree") end
lua:concat_append(lua_args, ", ")
local body_lua = nomsu:tree_to_lua(\%body):as_statements("return ")
body_lua:remove_free_vars(args)
body_lua:declare_locals()
lua:append(")\n ", body_lua, "\nend)")
for i=2,#\%actions do
lua:append("\n", A_give_1_nickname_2(\%actions[i], \%actions[1], \%actions[i], is_compile_time))
end
return lua
end)
A_compile_1_to_2 = compile_time(function(tree, \%actions, \%body)
return A_action_1_2(tree, \%actions, \%body, true)
end)
compile [remove action %action] to
Lua ".."
A\(=lua "string.as_lua_id(\(%action.stub))") = nil
ARG_ORDERS[fn] = nil
COMPILE_TIME[fn] = nil
immediately
action [%tree as nomsu]
=lua "nomsu:tree_to_nomsu(\%tree)"
action [%tree as inline nomsu]
=lua "nomsu:tree_to_nomsu(\%tree, true)"
action [%tree as lua]
=lua "nomsu:tree_to_lua(\%tree)"
action [%tree as lua expr]
lua> ".."
local lua = nomsu:tree_to_lua(\%tree)
if not lua.is_value then
compile_error(\%tree, "Invalid thing to convert to lua expr:\n%s")
end
return lua
action [%tree as lua statements]
=lua "nomsu:tree_to_lua(\%tree):as_statements()"
action [%tree as lua return]
=lua "nomsu:tree_to_lua(\%tree):as_statements('return ')"
action [%var as lua identifier, %var as lua id]
lua> ".."
if type(\%var) == 'string' then return string.as_lua_id(\%var)
elseif \%var.type == 'Var' then return string.as_lua_id(\%var[1])
elseif \%var.type == 'Action' then return "A"..string.as_lua_id(\%var.stub)
end
immediately
compile [%tree with %t -> %replacement] to
Lua value ".."
\(%tree as lua expr):map(function(\(%t as lua expr))
\(%replacement as lua return)
end)
compile [declare locals in %code] to
Lua value "\(%code as lua expr):declare_locals()"
compile [declare locals %locals in %code] to
Lua value "\(%code as lua expr):declare_locals(\(%locals as lua expr))"
compile [remove free vars %vars from %code] to
Lua "\(%code as lua expr):remove_free_vars(\(%vars as lua expr));"
parse [%lua <-write %code, to %lua write %code] as: lua> "\%lua:append(\%code);"
immediately
compile [quote %s] to
Lua value ".."
('"'..\(%s as lua expr):gsub("\\\\", "\\\\\\\\"):gsub("\n","\\\\n"):gsub('"', '\\\\"')..'"')
compile [type of %obj] to: Lua value "type(\(%obj as lua expr))"
immediately
compile [parse %text] to
Lua value ".."
nomsu:parse(Nomsu("\("\(%text.source)")", \(%text as lua expr)))
compile [run %nomsu_code] to
Lua value "nomsu:run(Nomsu(\(quote "\(%nomsu_code.source)"), \(%nomsu_code as lua expr)))"
action [run tree %tree, %tree as value]
lua> ".."
if \%tree.type == 'Text' and #\%tree == 1 and type(\%tree[1]) == 'string' then
return \%tree[1]
end
local lua = Lua(\%tree.source, "return ",nomsu:tree_to_lua(\%tree))
return nomsu:run_lua(lua)
compile [compile %block, compiled %block, %block compiled] to
Lua value "nomsu:tree_to_lua(\(%block as lua))"
# Return
immediately
# Return statement is wrapped in a do..end block because Lua is unhappy if you
put code after a return statement, unless you wrap it in a block.
compile [return] to: Lua "do return; end"
compile [return %return_value] to: Lua "do return \(%return_value as lua expr); end"
# Literals
immediately
compile [yes] to: Lua value "true"
compile [no] to: Lua value "false"
compile [nothing, nil, null] to: Lua value "nil"