nomsu/core.nom

487 lines
20 KiB
Plaintext

# Rule for making rules
lua block ".."
|compiler:def("rule %spec = %body", function(compiler, vars)
| return compiler:def(vars.spec, vars.body)
|end)
rule "help %invocation" =:
lua block ".."
|local fn_info = compiler.defs[vars.invocation]
|if not fn_info then
| compiler:writeln("Function not found: "..compiler.utils.repr(vars.invocation, true))
|else
| compiler:writeln("rule "..compiler.utils.repr(fn_info.invocations).." ="..(fn_info.src or ":\\n <unknown source code>"))
|end
# Macros
lua block ".."
|local add_macro = function(compiler, vars, kind)
| local spec = compiler:tree_to_value(vars.spec, vars)
| local fn = compiler:tree_to_value(vars.body, vars)
| compiler:defmacro(spec, fn, vars.body.src)
| return "", true
|end
|compiler:defmacro("macro %spec = %body", add_macro)
|
|local add_macro_block = function(compiler, vars, kind)
| local spec = compiler:tree_to_value(vars.spec, vars)
| local fn = compiler:tree_to_value(vars.body, vars)
| local wrapper = function(compiler, vars, kind)
| if kind == "Expression" then
| compiler:error("Macro: "..spec.." was defined to be a block, but is being used as an expression.")
| end
| return ("do\\n"..fn(compiler, vars, kind).."\\nend"), true
| end
| compiler:defmacro(spec, wrapper, vars.body.src)
| return "", true
|end
|compiler:defmacro("macro block %spec = %body", add_macro_block)
# Compiler tools
rule ["eval %code", "run %code"] =:
lua expr "compiler:run(vars.code)"
macro "source code %code" =:
lua block ".."
|if vars.code.value.type ~= "Thunk" then
| compiler:error("'source code %' only takes code blocks, not "..vars.code.value.type)
|end
lua expr "compiler.utils.repr(vars.code.value.value.src, true)"
rule "run file %filename" =:
lua block ".."
|local file = io.open(vars.filename)
|return compiler:run(file:read("*a"))
# Error functions
rule "error!" =:
lua block ".."
|table.remove(compiler.callstack)
|compiler:error()
rule "error %msg" =:
lua block ".."
|table.remove(compiler.callstack)
|compiler:error(vars.msg)
macro "as lua %block" =:
lua expr "compiler.utils.repr(compiler:tree_to_lua(vars.block.value.value, vars), true)"
macro block "show generated lua %block" =:
".."|compiler:writeln(\lua expr "compiler.utils.repr(compiler:tree_to_lua(vars.block.value.value, vars), true)"\)
# Macro helper functions
rule "%tree as value" =:
lua expr ".."
|compiler:tree_to_value(vars.tree, vars)
rule "%tree as lua block" =:
lua block ".."
|return compiler:tree_to_lua(vars.tree, 'Statement'), true
rule "%tree as lua expr" =:
lua expr ".."
|compiler:tree_to_lua(vars.tree, 'Expression')
# Moonscript!
macro block "moonscript block %moonscript_code" =:
lua block ".."
|local parse, compile = require('moonscript.parse'), require('moonscript.compile')
|local moon_code = compiler:tree_to_value(vars.moonscript_code, vars)
|local tree, err = parse.string(moon_code)
|if not tree then
| compiler:error("Failed to parse moonscript: "..err)
|end
|local lua_code, err, pos = compile.tree(tree)
|if not lua_code then
| compiler:error(compile.format_error(err, pos, moon_code))
|end
|return "do\\n"..lua_code.."\\nend"
macro "moonscript %moonscript_code" =:
lua block ".."
|local parse, compile = require('moonscript.parse'), require('moonscript.compile')
|local moon_code = compiler:tree_to_value(vars.moonscript_code, vars)
|local tree, err = parse.string(moon_code)
|if not tree then
| compiler:error("Failed to parse moonscript: "..err)
|end
|local lua_code, err, pos = compile.tree(tree)
|if not lua_code then
| compiler:error(compile.format_error(err, pos, moon_code))
|end
|return "(function(compiler, vars)\\n"..lua_code.."\\nend)(compiler, vars)"
# String functions
rule "join %strs" =:
lua block ".."
|local str_bits = {}
|for i,bit in ipairs(vars.strs) do str_bits[i] = compiler.utils.repr(bit) end
|return table.concat(str_bits)
rule "join %strs with glue %glue" =:
lua block ".."
|local str_bits = {}
|for i,bit in ipairs(vars.strs) do str_bits[i] = compiler.utils.repr(bit) end
|return table.concat(str_bits, vars.glue)
rule ["capitalize %str", "%str capitalized"] =:
lua expr ".."|vars.str:gsub("%l", string.upper, 1)
# Variable assignment
#..
macro block "%var = %value" =:
lua block ".."
|if vars.var.value.type ~= "Var" then
| compiler:error("Assignment operation has the wrong type for the left hand side. "
| .."Expected Var, but got: "..vars.var.value.type)
|end
".."|\%var as lua expr\ = \%value as lua expr\
macro block "%var = %value" =:
lua block ".."
|if vars.var.value.type ~= "Var" then
| compiler:error("Assignment operation has the wrong type for the left hand side. "
| .."Expected Var, but got: "..vars.var.value.type)
|end
lua block ".."
|if vars.value.value.type ~= "Thunk" then
| compiler:error("Assignment operation has the wrong type for the right hand side. "
| .."Expected Thunk, but got: "..vars.value.value.type.."\\nMaybe you used '=' instead of '=:'?")
|end
".."|do
| local ret
| \lua expr "compiler:tree_to_lua(vars.value.value.value, 'Statement')"\
| \%var as lua expr\ = ret
|end
# Operators
macro ["true","yes"] =: "true"
macro ["false","no"] =: "false"
macro ["nil","null"] =: "nil"
macro block ["nop", "pass"] =: ""
macro "%a + %b" =: ".."|(\%a as lua expr\ + \%b as lua expr\)
macro "%a + %b + %c" =: ".."|(\%a as lua expr\ + \%b as lua expr\ + \%c as lua expr\)
macro "%a + %b + %c + %d" =: ".."|(\%a as lua expr\ + \%b as lua expr\ + \%c as lua expr\ + \%d as lua expr\)
macro "%a - %b" =: ".."|(\%a as lua expr\ - \%b as lua expr\)
macro "%a * %b" =: ".."|(\%a as lua expr\ * \%b as lua expr\)
macro "%a * %b * %c" =: ".."|(\%a as lua expr\ * \%b as lua expr\ * \%c as lua expr\)
macro "%a * %b * %c * %d" =: ".."|(\%a as lua expr\ * \%b as lua expr\ * \%c as lua expr\ * \%d as lua expr\)
macro "%a / %b" =: ".."|(\%a as lua expr\ / \%b as lua expr\)
macro "%a === %b" =: ".."|(\%a as lua expr\ == \%b as lua expr\)
macro "%a !== %b" =: ".."|(\%a as lua expr\ ~= \%b as lua expr\)
macro "%a < %b" =: ".."|(\%a as lua expr\ < \%b as lua expr\)
macro "%a < %b < %c" =: ".."|((\%a as lua expr\ < \%b as lua expr\) and (\%b as lua expr\ < \%c as lua expr\))
macro "%a <= %b < %c" =: ".."|((\%a as lua expr\ <= \%b as lua expr\) and (\%b as lua expr\ < \%c as lua expr\))
macro "%a <= %b <= %c" =: ".."|((\%a as lua expr\ <= \%b as lua expr\) and (\%b as lua expr\ <= \%c as lua expr\))
macro "%a < %b <= %c" =: ".."|((\%a as lua expr\ < \%b as lua expr\) and (\%b as lua expr\ <= \%c as lua expr\))
macro "%a > %b > %c" =: ".."|((\%a as lua expr\ > \%b as lua expr\) and (\%b as lua expr\ > \%c as lua expr\))
macro "%a >= %b > %c" =: ".."|((\%a as lua expr\ >= \%b as lua expr\) and (\%b as lua expr\ > \%c as lua expr\))
macro "%a >= %b >= %c" =: ".."|((\%a as lua expr\ >= \%b as lua expr\) and (\%b as lua expr\ >= \%c as lua expr\))
macro "%a > %b >= %c" =: ".."|((\%a as lua expr\ > \%b as lua expr\) and (\%b as lua expr\ >= \%c as lua expr\))
macro "%a <= %b" =: ".."|(\%a as lua expr\ <= \%b as lua expr\)
macro "%a > %b" =: ".."|(\%a as lua expr\ > \%b as lua expr\)
macro "%a >= %b" =: ".."|(\%a as lua expr\ >= \%b as lua expr\)
macro "%a ^ %b" =: ".."|(\%a as lua expr\ ^ \%b as lua expr\)
macro "%a and %b" =: ".."|(\%a as lua expr\ and \%b as lua expr\)
macro "%a and %b and %c" =:
".."|(\%a as lua expr\ and \%b as lua expr\ and \%c as lua expr\)
macro "%a and %b and %c and %d" =:
".."|(\%a as lua expr\ and \%b as lua expr\ and \%c as lua expr\ and \%d as lua expr\)
macro "%a or %b" =: ".."|(\%a as lua expr\ or \%b as lua expr\)
macro "%a or %b or %c" =:
".."|(\%a as lua expr\ or \%b as lua expr\ or \%c as lua expr\)
macro "%a or %b or %c or %d" =:
".."|(\%a as lua expr\ or \%b as lua expr\ or \%c as lua expr\ or \%d as lua expr\)
macro "%a mod %b" =: ".."|(\%a as lua expr\ mod \%b as lua expr\)
macro "- %a" =: ".."|-(\%a as lua expr\)
macro "not %a" =: ".."|not (\%a as lua expr\)
rule "%a == %b" =:
lua expr "((vars.a == vars.b) or compiler.utils.equivalent(vars.a, vars.b))"
rule "%a != %b" =:
lua expr "((vars.a ~= vars.b) or not compiler.utils.equivalent(vars.a, vars.b))"
macro "repr %obj" =:
".."|compiler.utils.repr(\%obj as lua expr\, true)
macro "say %str" =:
".."|compiler:writeln(compiler.utils.repr(\%str as lua expr\))
# Control flow
rule "do %action" =:
lua expr "vars.action(compiler, setmetatable({}, {__index=vars}))"
macro block "return %return_value" =:
lua block ".."
|if vars.return_value.value.type ~= "Thunk" then
| compiler:error("Assignment operation has the wrong type for the right hand side. "
| .."Expected Thunk, but got: "..vars.return_value.value.type.."\\nMaybe you used '=' instead of '=:'?")
|end
".."|do
| local ret
| \lua expr "compiler:tree_to_lua(vars.return_value.value.value, 'Statement')"\
| return ret
|end
macro block "return" =:
"return nil"
# Conditionals
macro block "if %condition %if_body" =:
".."|if \%condition as lua expr\ then
| \(lua expr "vars.if_body.value.value") as lua block\
|end
macro block "if %condition %if_body else %else_body" =:
".."|if \%condition as lua expr\ then
| \(lua expr "vars.if_body.value.value") as lua block\
|else
| \(lua expr "vars.else_body.value.value") as lua block\
|end
# Ternary operator
macro "%if_expr if %condition else %else_expr" =:
".."|(function(compiler, vars)
| if \%condition as lua expr\ then
| return \%if_expr as lua expr\
| else
| return \%else_expr as lua expr\
| end
|end)(compiler, vars)
# For loop
macro block "for %var in %iterable %body" =:
%var-type =: lua expr "vars.var.value.type"
if (%var-type != "Var"):
error ".."
|For loop has the wrong type for the loop variable. Expected Var, but got: \%var-type\
%var-code =: %var as lua expr
".."|local old_loopval = \%var-code\
|for i,value in ipairs(\%iterable as lua expr\) do
| \%var-code\ = value
| \(lua expr "vars.body.value.value") as lua block\
|end
|\%var-code\ = old_loopval
macro block "for all %iterable %body" =:
".."|local old_loopval = vars.it
|for i,value in ipairs(\%iterable as lua expr\) do
| vars.it = value
| \(lua expr "vars.body.value.value") as lua block\
|end
|vars.it = old_loopval
# List Comprehension
# TODO: maybe make this lazy, or a lazy version?
macro "%expression for %var in %iterable" =:
%var-type =: lua expr "vars.var.value.type"
if (%var-type != "Var"):
error ".."
|List comprehension has the wrong type for the loop variable. Expected Var, but got: \%var-type\
%var-code =: %var as lua expr
".."|(function(game, vars)
| local comprehension = {}
| for i,value in ipairs(\%iterable as lua expr\) do
| \%var-code\ = value
| comprehension[i] = \%expression as lua expr\
| end
| return comprehension
|end)(game, setmetatable({}, {__index=vars}))
macro "%expression for all %iterable" =:
".."|(function(game, vars)
| local comprehension = {}
| for i,value in ipairs(\%iterable as lua expr\) do
| vars.it = value
| comprehension[i] = \%expression as lua expr\
| end
| return comprehension
|end)(game, setmetatable({}, {__index=vars}))
# Dict comprehension
macro "%key -> %value for %var in %iterable" =:
%var-type =: lua expr "vars.var.value.type"
if (%var-type != "Var"):
error ".."
|Dict comprehension has the wrong type for the loop variable. Expected Var, but got: \%var-type\
%var-code =: %var as lua expr
".."|(function(game, vars)
| local comprehension = {}
| for i,value in ipairs(\%iterable as lua expr\) do
| \%var-code\ = value
| comprehension[\%key as lua expr\] = \%value as lua expr\
| end
| return comprehension
|end)(game, setmetatable({}, {__index=vars}))
macro "%key -> %value for all %iterable" =:
".."|(function(game, vars)
| local comprehension = {}
| for i,value in ipairs(\%iterable as lua expr\) do
| vars.it = value
| comprehension[\%key as lua expr\] = \%value as lua expr\
| end
| return comprehension
|end)(game, setmetatable({}, {__index=vars}))
# Number ranges
rule "%start up to %stop" =:
lua expr "compiler.utils.range(vars.start,vars.stop-1)"
rule ["%start thru %stop", "%start through %stop"] =:
lua expr "compiler.utils.range(vars.start,vars.stop)"
rule "%start down to %stop" =:
lua expr "compiler.utils.range(vars.start,vars.stop+1,-1)"
rule ["%start down thru %stop", "%start down through %stop"] =:
lua expr "compiler.utils.range(vars.start,vars.stop,-1)"
rule "%start up to %stop via %step" =:
lua expr "compiler.utils.range(vars.start,vars.stop-1,vars.step)"
rule ["%start thru %stop via %step", "%start through %stop via %step"] =:
lua expr "compiler.utils.range(vars.start,vars.stop,vars.step)"
rule "%start down to %stop via %step" =:
lua expr "compiler.utils.range(vars.start,vars.stop+1,-vars.step)"
rule ["%start down thru %stop via %step", "%start down through %stop via %step"] =:
lua expr "compiler.utils.range(vars.start,vars.stop,-vars.step)"
# Common utility functions
rule ["random number"] =: lua expr "math.random()"
rule ["sum of %items"] =: lua expr "compiler.utils.sum(vars.items)"
rule ["product of %items"] =: lua expr "compiler.utils.product(vars.items)"
rule ["all of %items"] =: lua expr "compiler.utils.all(vars.items)"
rule ["any of %items"] =: lua expr "compiler.utils.any(vars.items)"
rule ["avg of %items", "average of %items"] =: lua expr "(compiler.utils.sum(vars.items)/#vars.items)"
rule ["min of %items", "smallest of %items", "lowest of %items"] =:
lua expr "compiler.utils.min(vars.items)"
rule ["max of %items", "biggest of %items", "largest of %items", "highest of %items"] =:
lua expr "compiler.utils.min(vars.items)"
rule ["min of %items with respect to %keys"] =:
lua expr "compiler.utils.min(vars.items, vars.keys)"
rule ["max of %items with respect to %keys"] =:
lua expr "compiler.utils.max(vars.items, vars.keys)"
# List/dict functions
macro [..]
"%list 's %index", "%index st in %list", "%index nd in %list", "%index rd in %list"
"%index th in %list", "%index in %list", "%list -> %index"
..=:
".."|\%list as lua expr\[\%index as lua expr\]
macro block [..]
"%list 's %index = %value", "%index st in %list = %value", "%index nd in %list = %value"
"%index rd in %list = %value", "%index th in %list = %value", "%index in %list = %value"
"%index = %value in %list", "%list -> %index = %value"
..=:
lua block ".."
|if vars.value.value.type ~= "Thunk" then
| compiler:error("Dict assignment operation has the wrong type for the right hand side. "
| .."Expected Thunk, but got: "..vars.value.value.type.."\\nMaybe you used '=' instead of '=:'?")
|end
".."|do
| local ret
| \lua expr "compiler:tree_to_lua(vars.value.value.value, 'Statement')"\
| \%list as lua expr\[\%index as lua expr\] = ret
|end
macro ["%item is in %list", "%list contains %item"] =:
".."|(\%list as lua expr\[\%index as lua expr\] ~= nil)
macro ["length of %list", "size of %list", "number of %list"] =:
".."|#(\%list as lua expr\)
rule "dict %items" =:
%dict =: []
for %pair in %items:
lua block "vars.dict[vars.pair[1]] = vars.pair[2]"
return: %dict
# Permission functions
rule "restrict %fn to within %whitelist" =:
lua block ".."
|local fns = compiler:get_invocations(vars.fn)
|local whitelist = compiler:get_invocations(vars.whitelist)
|local whiteset = {}
|for _,w in ipairs(whitelist) do
| if not compiler.defs[w] then
| compiler:error("Undefined function: "..tostring(w))
| else whiteset[w] = true
| end
|end
|for _,fn in ipairs(fns) do
| local fn_info = compiler.defs[fn]
| if fn_info == nil then
| compiler:error("Undefined function: "..tostring(fn))
| elseif not compiler:check_permission(fn) then
| compiler:writeln("You do not have permission to restrict function: "..tostring(fn))
| else
| compiler.defs[fn].whiteset = whiteset
| end
|end
rule "allow %whitelist to use %fn" =:
lua block ".."
|local fns = compiler:get_invocations(vars.fn)
|local whitelist = compiler:get_invocations(vars.whitelist)
|for _,w in ipairs(whitelist) do
| if not compiler.defs[w] then
| compiler:error("Undefined function: "..tostring(w))
| end
|end
|for _,fn in ipairs(fns) do
| local fn_info = compiler.defs[fn]
| if fn_info == nil then
| compiler:error("Undefined function: "..tostring(fn))
| elseif fn_info.whiteset == nil then
| compiler:writeln("Function is already allowed by everyone: "..tostring(fn))
| elseif not compiler:check_permission(fn) then
| compiler:writeln("You do not have permission to grant permissions for function: "..tostring(fn))
| else
| for _,w in ipairs(whitelist) do
| fn_info.whiteset[w] = true
| end
| end
|end
rule "forbid %blacklist to use %fn" =:
lua block ".."
|local fns = compiler:get_invocations(vars.fn)
|local blacklist = compiler:get_invocations(vars.blacklist)
|for _,b in ipairs(blacklist) do
| if not compiler.defs[b] then
| compiler:error("Undefined function: "..tostring(b))
| end
|end
|for _,fn in ipairs(fns) do
| local fn_info = compiler.defs[fn]
| if fn_info == nil then
| compiler:error("Undefined function: "..tostring(fn))
| elseif fn_info.whiteset == nil then
| compiler:writeln("Cannot remove items from a whitelist when there is no whitelist on function: "..tostring(fn))
| elseif not compiler:check_permission(fn) then
| compiler:writeln("You do not have permission to restrict function: "..tostring(fn))
| else
| for _,b in ipairs(blacklist) do fn_info.whiteset[b] = nil end
| end
|end
# For unit testing
macro block "test %code yields %expected" =:
%generated =: lua expr "compiler.utils.repr(compiler:stringify_tree(vars.code.value.value), true)"
%expected =: %expected as lua expr
if (%generated != %expected):
say "Test failed!"
say "Expected:"
say %expected
say "But got:"
say %generated
error!
return: ""