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#!/usr/bin/env nomsu -V4.8.10
#
This file defines upgrades from Nomsu 1 to Nomsu 2
use "compatibility/compatibility.nom"
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
upgrade %tree to "2" as:
unless (%tree is "Action" syntax tree): return
if (%tree.stub is "if 1 2 else"):
%true_body = (%tree.3 upgraded)
unless (%true_body is "Block" syntax tree):
%true_body = \(: %true_body)
%false_body = (%tree.5 upgraded)
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, true_body:%true_body, false_body:%false_body
%need_blocks = [..]
"if", "unless", "for 1 in", "for 1 = 2 in", "repeat while 1"
"repeat 1 times", "repeat", "repeat until 1", "for 1 in 2 to 3 by"
"for 1 in 2 to 3 via", "for 1 in 2 to", "for 1 2 in"
"do", "for 1 in recursive", "test", "with", "result of"
for %n in %need_blocks:
if (%tree.stub is %n):
%bits = (((% upgraded) if (% is syntax tree) else %) for % in %tree)
unless ((%bits::last) is "Block" syntax tree):
%body = (%bits::last)
%bits.(size of %bits) = (=lua "Block(\%body.source, \%body)")
return (=lua "Action(\%tree.source, unpack(\%bits))")
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