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Functional errors with formatted output

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'use strict'

var formatter = require('format')

var fault = create(Error)

module.exports = fault

fault.eval = create(EvalError)
fault.range = create(RangeError)
fault.reference = create(ReferenceError)
fault.syntax = create(SyntaxError)
fault.type = create(TypeError)
fault.uri = create(URIError)

fault.create = create

// Create a new `EConstructor`, with the formatted `format` as a first argument.
function create(EConstructor) {
  FormattedError.displayName = EConstructor.displayName || EConstructor.name

  return FormattedError

  function FormattedError(format) {
    if (format) {
      format = formatter.apply(null, arguments)
    }

    return new EConstructor(format)
  }
}