#!/usr/bin/env nomsu -V4.9.11.6
#
    This file defines upgrades from Nomsu <4.9 to 4.9
use "compatibility/compatibility.nom"

upgrade action "local action 1 2" to "4.9" via (..)
    [%tree, %end_version] ->:
        %spec = %tree.3
        %body = %tree.4
        if %spec.type is:
            "List":
                if ((size of %spec) == 1):
                    return \(%spec.1 means %body)
                ..else:
                    return \(%spec all mean %body)
            else:
                return \(%spec means %body)

upgrade action "action 1 2" to "4.9" via (..)
    [%tree, %end_version] ->:
        %spec = %tree.2
        %body = %tree.3
        if %spec.type is:
            "List":
                if ((size of %spec) == 1):
                    return \(externally %spec.1 means %body)
                ..else:
                    return \(externally %spec all mean %body)
            else:
                return \(externally %spec means %body)

upgrade action "compile 1 to 2" to "4.9" via (..)
    [%tree, %end_version] ->:
        %spec = %tree.2
        %body = %tree.4
        if %spec.type is:
            "List":
                if ((size of %spec) == 1):
                    return \(%spec.1 compiles to %body)
                ..else:
                    return \(%spec all compile to %body)
            else:
                return \(%spec compiles to %body)

upgrade action "parse 1 as 2" to "4.9" via (..)
    [%tree, %end_version] ->:
        %spec = %tree.2
        %body = %tree.4
        if %spec.type is:
            "List":
                if ((size of %spec) == 1):
                    return \(%spec.1 parses as %body)
                ..else:
                    return \(%spec all parse as %body)
            else:
                return \(%spec parse as %body)

upgrade action (compile as %) to "4.9" as (what % compiles to)
upgrade action (action %) to "4.9" as (%'s meaning)
upgrade action (remove action %) to "4.9" as ((%'s meaning) = (nil))
upgrade action (if %) to "4.9" as (when %)