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|
#..
This File contains rules for making rules and macros and some helper functions to make
that easier.
# Nil
lua code ".."
|nomsu:defmacro("nil", function(nomsu, vars) return "nil", nil end)
..with value 0
# Macros:
lua code ".."
|nomsu:def("parse %shorthand as %longhand", function(nomsu, vars)
| local alias = nomsu:get_alias(vars.shorthand)
| local template = vars.longhand
| nomsu:defmacro(alias, function(nomsu, vars)
| return nomsu:tree_to_lua(nomsu:replaced_vars(template, vars))
| end)
|end)
..with value (nil)
parse \(lua code %code) as\: lua code %code with value (nil)
parse \(lua block %block) as\:
lua code ".."
|do
| \(%block)
|end
..with value (nil)
parse \(lua value %value) as\: lua code (nil) with value %value
parse \(nomsu) as\: lua value "nomsu"
parse \(nomsu's %key) as\:
lua value "nomsu[\(%key as lua)]"
parse \(nomsu %method %args) as\:
lua block ".."
|local args = {"nomsu"}
|for _,arg in ipairs(vars.args.value) do
| table.insert(args, nomsu:tree_to_lua(arg))
|end
|local method_name = nomsu:repr(nomsu:tree_to_value(vars.method, vars))
..with value ".."
|("nomsu[%s](%s)"):format(method_name, table.concat(args, ", "))
parse \(repr %) as\: nomsu "repr" [%]
# Rule that lets you make new rules
lua block ".."
|nomsu:def("rule helper %rule_def = %body", function(nomsu, vars)
| nomsu:def(nomsu:get_alias(vars.rule_def), vars.body)
|end)
parse \(rule %rule_def = %body) as\: rule helper \(%rule_def) = \(%body)
parse \(rule %rule_name) as\: lua value "nomsu.defs[nomsu:get_alias(\(%rule_name))]"
# Get the source code for a function
rule (help %rule) =:
lua block ".."
|local fn_def = nomsu:get_fn_def(vars.rule)
|if not fn_def then
| nomsu:writeln("Rule not found: "..nomsu:repr(vars.rule))
|else
| nomsu:writeln("rule "..nomsu:repr(nomsu.utils.keys(fn_def.aliases))
| .." ="..(fn_def.src or ":\\n <unknown source code>"))
|end
# Macro helper functions
rule (%tree as value) =:
lua expr "nomsu:tree_to_value(vars.tree, vars)"
rule (%tree as lua) =:
lua expr "nomsu:tree_to_lua(vars.tree)"
# Compiler tools
rule (eval %code; run %code) =: nomsu "run" [%code]
rule (source code from tree %tree) =:
lua block ".."
|local _,_,leading_space = vars.tree.src:find("\\n(%s*)%S")
|if leading_space then
| local chunk1, chunk2 = vars.tree.src:match(":%s*([^\\n]*)(\\n.*)")
| chunk2 = chunk2:gsub("\\n"..leading_space, "\\n")
| return chunk1..chunk2.."\\n"
|else
| return vars.tree.src:match(":%s*(%S.*)").."\\n"
|end
macro (source code %body) =:
nomsu "repr" [nomsu "call" ["source code from tree %", %body]]
macro (parse tree %code) =:
nomsu "repr" [nomsu "stringify_tree" [lua expr "vars.code.value"]]
|
