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|
local cat
cat.rule.default = function (self)
self.isTruly = true
self.truly = self
self.falsy = cat.class 'never'
self.view = self.name
end
cat.rule.never = function (self)
self.isTruly = nil
end
cat.rule.any = function (self)
self.isTruly = nil
self.truly = cat.class 'truly'
self.falsy = cat.boolean(false) | cat.class 'nil'
end
cat.rule['nil'] = function (self)
self.isTruly = false
self.truly = cat.class 'never'
self.falsy = self
end
cat.rule.boolean = function (self)
if self.value == true then
self.isTruly = true
self.truly = self
self.falsy = cat.class 'never'
elseif self.value == false then
self.isTruly = false
self.truly = cat.class 'never'
self.falsy = self
else
self.isTruly = nil
self.truly = cat.boolean(true)
self.falsy = cat.boolean(false)
end
end
cat.rule.number = function (self)
self.isTruly = true
self.truly = self
self.falsy = cat.class 'never'
self.view = tostring(self.value)
end
cat.rule.integer = function (self)
self.isTruly = true
self.truly = self
self.falsy = cat.class 'never'
self.view = tostring(self.value)
end
cat.rule.string = function (self)
self.isTruly = true
self.truly = self
self.falsy = cat.class 'never'
self.view = cat.util.viewString(self.value, self.quotation)
end
cat.rule.union = function (self)
self.isTruly = function (union)
local isTruly = union.subs[1].isTruly
if isTruly == nil then
return nil
end
if isTruly == true then
for i = 2, #union.subs do
if union.subs[i].isTruly ~= true then
return nil
end
end
return true
else
for i = 2, #union.subs do
if union.subs[i].isTruly ~= false then
return nil
end
end
return false
end
return nil
end
self.truly = function (union)
local new = cat.union()
for i = 1, #union.subs do
new:add(union.subs[i].truly)
end
if new:len() == 0 then
return cat.class 'never'
end
if new:len() == 1 then
return new[1]
end
return new
end
self.falsy = function (union)
local new = cat.union()
for i = 1, #union.subs do
new:add(union.subs[i].falsy)
end
if new:len() == 0 then
return cat.class 'never'
end
if new:len() == 1 then
return new[1]
end
return new
end
self.view = function (union)
local views = {}
for i = 1, #union.subs do
views[i] = union.subs[i].view
end
if #views == 0 then
return 'never'
end
return table.concat(views, '|')
end
end
cat.custom.dofile.onReturn = function (context)
local filename = context.args[1].asString
local file = cat.files[filename]
return file.returns[1]
end
|
