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							- 'use strict'
 
- function isArguments (thingy) {
 
-   return typeof thingy === 'object' && thingy.hasOwnProperty('callee')
 
- }
 
- var types = {
 
-   '*': ['any', function () { return true }],
 
-   A: ['array', function (thingy) { return Array.isArray(thingy) || isArguments(thingy) }],
 
-   S: ['string', function (thingy) { return typeof thingy === 'string' }],
 
-   N: ['number', function (thingy) { return typeof thingy === 'number' }],
 
-   F: ['function', function (thingy) { return typeof thingy === 'function' }],
 
-   O: ['object', function (thingy) { return typeof thingy === 'object' && !types.A[1](thingy) && !types.E[1](thingy) }],
 
-   B: ['boolean', function (thingy) { return typeof thingy === 'boolean' }],
 
-   E: ['error', function (thingy) { return thingy instanceof Error }]
 
- }
 
- var validate = module.exports = function (schema, args) {
 
-   if (!schema) throw missingRequiredArg(0, 'schema')
 
-   if (!args) throw missingRequiredArg(1, 'args')
 
-   if (!types.S[1](schema)) throw invalidType(0, 'string', schema)
 
-   if (!types.A[1](args)) throw invalidType(1, 'array', args)
 
-   for (var ii = 0; ii < schema.length; ++ii) {
 
-     var type = schema[ii]
 
-     if (!types[type]) throw unknownType(ii, type)
 
-     var typeLabel = types[type][0]
 
-     var typeCheck = types[type][1]
 
-     if (type === 'E' && args[ii] == null) continue
 
-     if (args[ii] == null) throw missingRequiredArg(ii)
 
-     if (!typeCheck(args[ii])) throw invalidType(ii, typeLabel, args[ii])
 
-     if (type === 'E') return
 
-   }
 
-   if (schema.length < args.length) throw tooManyArgs(schema.length, args.length)
 
- }
 
- function missingRequiredArg (num) {
 
-   return newException('EMISSINGARG', 'Missing required argument #' + (num + 1))
 
- }
 
- function unknownType (num, type) {
 
-   return newException('EUNKNOWNTYPE', 'Unknown type ' + type + ' in argument #' + (num + 1))
 
- }
 
- function invalidType (num, expectedType, value) {
 
-   var valueType
 
-   Object.keys(types).forEach(function (typeCode) {
 
-     if (types[typeCode][1](value)) valueType = types[typeCode][0]
 
-   })
 
-   return newException('EINVALIDTYPE', 'Argument #' + (num + 1) + ': Expected ' +
 
-     expectedType + ' but got ' + valueType)
 
- }
 
- function tooManyArgs (expected, got) {
 
-   return newException('ETOOMANYARGS', 'Too many arguments, expected ' + expected + ' and got ' + got)
 
- }
 
- function newException (code, msg) {
 
-   var e = new Error(msg)
 
-   e.code = code
 
-   Error.captureStackTrace(e, validate)
 
-   return e
 
- }
 
 
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