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