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#!/usr/bin/env moon
nomic = require 'nomic'
utils = require 'utils'
g = nomic()
g\def {"say %x", "print %x"}, (vars)=>
print(utils.repr(vars.x))
g\def [[printf %str]], (args)=>
for s in *args.str do io.write(utils.repr(s))
io.write("\n")
g\defmacro "return %retval", (vars,helpers,ftype)=>
with helpers
switch ftype
when "Expression"
error("Cannot use a return statement as an expression")
when "Statement"
.lua "do return "..(.ded(.transform(vars.retval))).." end"
else
error"Unknown: #{ftype}"
return nil
g\defmacro "let %varname = %value", (vars, helpers, ftype)=>
with helpers
if ftype == "Expression" then error("Cannot set a variable in an expression.")
.lua "vars[#{.ded(.transform(vars.varname))} = #{.ded(.transform(vars.value))}"
return nil
singleton = (aliases, value)->
g\defmacro aliases, (vars,helpers,ftype)=>
if ftype == "Expression" then helpers.lua(value)
else helpers.lua("ret = #{value}")
infix = (ops)->
for op in *ops
alias = op
if type(op) == 'table'
{alias,op} = op
g\defmacro "%x #{op} %y", (vars,helpers,ftype)=>
helpers.lua("(#{helpers.var('x')} #{op} #{helpers.var('y')})")
unary = (ops)->
for op in *ops
g\defmacro "#{op} %x", (vars,helpers,ftype)=>
helpers.lua("#{op}(#{helpers.var('x')})")
singleton {"true","yes"}, "true"
singleton {"false","no"}, "false"
singleton {"nil","null","nop","pass"}, "nil"
infix{"+","-","*","/","==",{"!=","~="},"<","<=",">",">=","^","and","or"}
unary{"-","#","not"}
g\def [[%x == %y]], (args)=> utils.equivalent(args.x, args.y)
g\def "rule %spec %body", (vars)=>
self\def vars.spec, vars.body
print "Defined rule: #{utils.repr(vars.spec)}"
-- TODO: write help
g\def [[random]], -> math.random()
g\def [[sum %items]], (args)=> utils.sum(args.items)
g\def [[all %items]], (args)=> utils.all(args.items)
g\def [[any %items]], (args)=> utils.any(args.items)
g\def {[[average %items]], [[avg %items]]}, (args)=> utils.sum(items)/#items
g\def {[[min %items]], [[smallest %items]], [[lowest %items]], [[fewest %items]]}, (args)=>
utils.min(args.items)
g\def {[[max %items]], [[largest %items]], [[highest %items]], [[most %items]]}, (args)=>
utils.max(args.items)
g\def {[[argmin %items]]}, (args)=>
utils.min(args.items, ((i)->i[2]))
g\def {[[argmax %items]]}, (args)=>
utils.max(args.items, ((i)->i[2]))
g\def {[[min %items with respect to %keys]]}, (args)=>
utils.min(args.items, args.keys)
g\def {[[max %items with respect to %keys]]}, (args)=>
utils.max(args.items, args.keys)
g\def {[[%index st in %list]], [[%index nd in %list]], [[%index rd in %list]], [[%index th in %list]]}, (args)=>
with args
if type(.list) != 'table'
print "Not a list: #{.list}"
return
.list[.index]
g\def {[[index of %item in %list]]}, (args)=>
with args
if type(.list) != 'table'
print "Not a list: #{.list}"
return
utils.key_for(args.list, args.item)
g\run [=[
rule ["%item is in %list", "%list contains %item"]: (index of %item in %list) != (nil)
]=]
g\def {[[# %list]], [[length of %list]], [[size of %list]]}, (args)=>
with args
if type(.list) != 'table'
print "Not a list: #{.list}"
return
return #(.list)
g\defmacro "if %condition %if_body else %else_body", (vars,helpers,ftype)=>
with helpers
switch ftype
when "Expression"
.lua "((#{.ded(.transform(vars.condition))}) and"
.indented ->
.lua "("..(.ded(.transform(vars.if_body)))..")"
.lua "or ("..(.ded(.transform(vars.if_body))).."))(game, vars)"
when "Statement"
.lua("if (#{.ded(.transform(vars.condition))}) then")
.indented ->
if_body = vars.if_body
while if_body.type != "Block"
if_body = if_body.value
if if_body == nil then error("Failed to find body.")
for statement in *if_body.value
.lua(.ded(.transform(statement)))
.lua("else")
.indented ->
else_body = vars.else_body
while else_body.type != "Block"
else_body = else_body.value
if else_body == nil then error("Failed to find body.")
for statement in *else_body.value
.lua(.ded(.transform(statement)))
.lua("end")
return nil
g\defmacro "for %varname in %iterable %body", (vars,helpers,ftype)=>
with helpers
switch ftype
when "Expression"
.lua "(function(game, vars)"
.indented ->
.lua "local comprehension, vars = {}, setmetatable({}, {__index=vars})"
.lua "for i, value in ipairs(#{.ded(.transform(vars.iterable))}) do"
.indented ->
.lua "local comp_value"
.lua "vars[#{.ded(.transform(vars.varname))}] = value"
body = vars.body
while body.type != "Block"
body = body.value
if body == nil then error("Failed to find body.")
for statement in *body.value
-- TODO: Clean up this ugly bit
.lua("comp_value = "..(.ded(.transform(statement.value, {type:"Expression"}))))
.lua "table.insert(comprehension, comp_value)"
.lua "end"
.lua "return comprehension"
.lua "end)(game,vars)"
when "Statement"
.lua "do"
.indented ->
.lua "local vars = setmetatable({}, {__index=vars})"
.lua "for i, value in ipairs(#{.ded(.transform(vars.iterable))}) do"
.indented ->
.lua "vars[#{.ded(.transform(vars.varname))}] = value"
body = vars.body
while body.type != "Block"
body = body.value
if body == nil then error("Failed to find body.")
for statement in *body.value
.lua(.ded(.transform(statement)))
.lua "end"
.lua "end"
return nil
g\simplemacro "if %condition %body", [[
if %condition %body
..else: pass
]]
g\simplemacro "unless %condition %body", [[
if (not %condition) %body
..else: pass
]]
g\def [[do %action]], (vars)=> return vars.action(self,vars)
g\defmacro [[lua %lua_code]], (vars,helpers,ftype)=>
with helpers
lua_code = vars.lua_code.value
switch lua_code.type
when "List"
.lua table.concat[i.value.value for i in *lua_code.value]
else
.lua(lua_code.value)
return nil
g\defmacro [[macro %spec %body]], (vars,helpers,ftype)=>
self\simplemacro vars.spec.value.value, vars.body.value.value.src
return g
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