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local vm = require 'vm'
local util = require 'utility'
local function getKey(src)
local key = vm.getKeyName(src)
if not key or #key <= 2 then
if not src.index then
return '[any]'
end
local class = vm.getClass(src.index)
if class then
return ('[%s]'):format(class)
end
local tp = vm.getType(src.index)
if tp then
return ('[%s]'):format(tp)
end
return '[any]'
end
local ktype = key:sub(1, 2)
key = key:sub(3)
if ktype == 's|' then
if key:match '^[%a_][%w_]*$' then
return key
else
return ('[%s]'):format(util.viewLiteral(key))
end
end
return ('[%s]'):format(key)
end
local function getField(src)
local tp = vm.getType(src)
local class = vm.getClass(src)
local literal = vm.getLiteral(src)
local key = getKey(src)
if type(literal) == 'string' and #literal >= 50 then
literal = literal:sub(1, 47) .. '...'
end
return key, class or tp, literal
end
local function mergeLiteral(a, b)
if not a then
return b
end
local view = util.viewLiteral(a)
if not view then
return b
end
if not b then
return { view, [view] = true }
end
if b[view] then
return b
end
b[view] = true
b[#b+1] = view
return b
end
local function buildAsHash(classes, literals)
local keys = {}
for k in pairs(classes) do
keys[#keys+1] = k
end
table.sort(keys)
local lines = {}
lines[#lines+1] = '{'
for _, key in ipairs(keys) do
local class = classes[key]
local literal = literals[key]
if literal then
table.sort(literal)
local view = table.concat(literal, '|')
lines[#lines+1] = (' %s: %s = %s,'):format(key, class, view)
else
lines[#lines+1] = (' %s: %s,'):format(key, class)
end
end
lines[#lines+1] = '}'
return table.concat(lines, '\n')
end
local function buildAsConst(classes, literals)
local keys = {}
for k in pairs(classes) do
keys[#keys+1] = k
end
table.sort(keys, function (a, b)
return tonumber(literals[a][1]) < tonumber(literals[b][1])
end)
local lines = {}
lines[#lines+1] = '{'
for _, key in ipairs(keys) do
local class = classes[key]
local literal = literals[key]
if literal then
table.sort(literal)
local view = table.concat(literal, '|')
lines[#lines+1] = (' %s: %s = %s,'):format(key, class, view)
else
lines[#lines+1] = (' %s: %s,'):format(key, class)
end
end
lines[#lines+1] = '}'
return table.concat(lines, '\n')
end
return function (source)
local literals = {}
local classes = {}
local intValue = true
vm.eachField(source, function (src)
local key, class, literal = getField(src)
classes[key] = vm.mergeTypeViews(class, classes[key])
literals[key] = mergeLiteral(literal, literals[key])
if class ~= 'integer'
or not literals[key]
or #literals[key] ~= 1 then
intValue = false
end
end)
if classes['[any]'] == 'any' then
classes['[any]'] = nil
end
if not next(classes) then
return '{}'
end
if intValue then
return buildAsConst(classes, literals)
else
return buildAsHash(classes, literals)
end
end
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