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local ast = require 'parser.ast'
return function (self, lua, mode, version, options)
local errs = {}
local diags = {}
local comms = {}
local state = {
version = version,
lua = lua,
root = {},
errs = errs,
diags = diags,
comms = comms,
options = options or {},
pushError = function (err)
if err.finish < err.start then
err.finish = err.start
end
local last = errs[#errs]
if last then
if last.start <= err.start and last.finish >= err.finish then
return
end
end
err.level = err.level or 'error'
errs[#errs+1] = err
return err
end,
pushDiag = function (code, info)
if not diags[code] then
diags[code] = {}
end
diags[code][#diags[code]+1] = info
end,
pushComment = function (comment)
comms[#comms+1] = comment
end
}
ast.init(state)
local suc, res, err = xpcall(self.grammar, debug.traceback, self, lua, mode)
ast.close()
if not suc then
return nil, res
end
if not res and err then
state.pushError(err)
end
state.ast = res
return state
end
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