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|
require "lib/metaprogramming.nom"
require "lib/utils.nom"
require "lib/control_flow.nom"
require "lib/operators.nom"
require "lib/collections.nom"
compile [say %str] to:
if ((%str's "type") == "String"):
"nomsu:writeln(\(%str as lua))"
..else:
"nomsu:writeln(nomsu:stringify(\(%str as lua)))"
compile [do %action] to code:
if ((%action's "type") == "Thunk"):
%action as lua statements
..else:
"(\(%action as lua))(nomsu, vars);"
# With statement
compile [with %assignments %action] to code:
%data = []
for %i = %assignment in (%assignments' "value"):
%tokens = (%assignment's "value")
%var = (%tokens -> 1)
%eq = (%tokens -> 2)
assert (=lua "vars.eq and vars.eq.type == 'Word' and vars.eq.value == '='") ".."
|Invalid format for 'with' statement. List entries must have the form %var = (value)
%value = (%tokens -> 3)
add (d{i=%i; var=%var; value=%value}) to %data
%foo = (..)
join (..)
"local old_value\(%->"i") = \((%->"var") as lua); \((%->"var") as lua) = \((%->"value") as lua);"
..for all %data
..with glue "\n "
".."
|do
| \(%foo)
| local fell_through = false;
| local ok, ret1, ret2 = pcall(function(nomsu, vars)
| \(%action as lua statements);
| fell_through = true;
| end, nomsu, vars);
| \(join ("\((%->"var") as lua) = old_value\(%->"i");" for all %data) with glue "\n ")
| if not ok then nomsu:error(ret1); end
| if not fell_through then
| return ret1, ret2;
| end
|end
parse [with %thing = %value %action] as: with [%thing = %value] %action
|
