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#!/usr/bin/env nomsu -V2
use "core"
use "compatibility/compatibility.nom"
upgrade %tree to "2" as:
unless (%tree is "Action" syntax tree): return
if (all[%tree.stub is "if % % else %", not (%tree.3 is "Var" syntax tree), not (%tree.5 is "Var" syntax tree)]):
%true_body <- (%tree.3 upgraded from "1.2")
unless (%true_body is "Block" syntax tree):
%true_body <- (=lua "Block(\%true_body.source, \%true_body)")
%false_body <- (%tree.5 upgraded from "1.2")
unless (%false_body is "Block" syntax tree):
%false_body <- (=lua "Block(\%false_body.source, \%false_body)")
return (..)
\(if %cond %true_body else %false_body)
..with vars {..}
cond:%tree.2 upgraded from "1.2", true_body:%true_body, false_body:%false_body
%need_blocks <- [..]
"if % %", "unless % %", "for % in % %", "for % = % in % %", "repeat while % %"
"repeat % times %", "repeat %", "repeat until % %", "for % in % to % by % %",
"for % in % to % via % %", "for % in % to % %", "for % % in % %", "do %"
"for % in recursive % %", "test %", "with % %", "result of %"
for %n in %need_blocks:
if ((%tree.stub is %n) and (not ((last in %tree) is "Var" syntax tree))):
%bits <- (((% upgraded from "1.2") if (% is syntax tree) else %) for % in %tree)
unless ((last in %bits) is "Block" syntax tree):
%body <- (last in %bits)
%bits.(length of %bits) <- (=lua "Block(\%body.source, \%body)")
return (=lua "Action(\%tree.source, unpack(\%bits))")
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