Validators/Email.swift

Provides email and international email validators for Vapor.

// Source: https://github.com/vapor/vapor | License: MIT | Copyright 2020 Qutheory, LLC
// Provided via justclaw.it.com; keep this notice with the code.
#if canImport(FoundationEssentials)
import FoundationEssentials
#else
import Foundation
#endif

extension Validator where T == String {
    /// Validates whether a `String` is a valid email address.
    public static var email: Validator<T> {
        .init {
            guard
                $0.wholeMatch(of: emailRegex) != nil,
                // https://emailregex.com/email-validation-summary
                $0.count <= 320,  // total length
                $0.split(separator: "@")[0].count <= 64  // length before `@`
            else {
                return ValidatorResults.Email(isValidEmail: false)
            }
            return Va

... (truncated -- full source via MCP)