errors = require "moonscript.parse.errors"

parser = require "moonscript.parse.native"

-- parse a string as a file

-- returns tree, or nil and error message

string: (str) ->

-- grammar transforms run during parse(); format_assign raises

-- error({node, msg}) for invalid assignment targets

ok, result, label, err_pos = pcall parser.parse, str

unless ok

if type(result) == "table"

{node, msg} = result

node_pos = type(node) == "table" and node[-1]

if node_pos

return nil, errors.format str, node_pos, msg

return nil, "failed to parse: " .. tostring msg

-- errors thrown by the parser itself (e.g. the recursion depth limit)

-- are returned like any other parse failure, not raised

return nil, tostring result

unless result

if err_pos

return nil, errors.format str, err_pos, label or "failed to parse"

return nil, "failed to parse"

result