Unable to parse accessor function when using arrow functions with a block body

[masquo]

I'm submitting a bug report

• Library Version:
  2.0.0

• Operating System:
  Windows 10

• Node Version:
  20.11.1

• NPM Version:
  10.2.4

• JSPM OR Webpack AND Version
  webpack 5.90.3

• Browser:
  all

• Language:
  TypeScript 5.4.2

Current behavior:
I'm using Webpack 5 with new AureliaPlugin({dist: "es2015}) and typescript target: "es6".
This config causes a runtime error when using arrow functions with a block body as accessor functions:

Inner Error:
Message: Unable to parse accessor function:
(model) => {
            return model.name;
        }
Inner Error Stack:
Error: Unable to parse accessor function:
(model) => {
            return model.name;
        }
    at getAccessorExpression (webpack-internal:///aurelia-validation:569:15)
    at PropertyAccessorParser.parse (webpack-internal:///aurelia-validation:552:30)
    at FluentEnsure.ensure (webpack-internal:///aurelia-validation:1651:44)
    at ValidationRules.ensure (webpack-internal:///aurelia-validation:1715:58)

Workaround: instead of using

// failing accessor function
.ensure((model) => {
  return model.name;
})

it is possible to use the old fashioned style or the one-liner

// working accessor functions
.ensure(function(model) {
  return model.name;
})

.ensure((model) => model.name)

Expected/desired behavior:

• What is the expected behavior?
  Update arrow function regex to allow arrow functions with a function body. This could be handy to support automatically formatted code.
  

  validation/src/property-accessor-parser.ts

  Line 33 in f1628a3

  const arrow = /^\(?[$_\w\d]+\)?\s*=>\s*[$_\w\d]+\.([$_\w\d]+)$/;

[Sayan751]

Hi @masquo, thank you for the issue. Would appreciate a pull request, if you feel like contributing.

[masquo]

OK, i will look in to it at the end of the week