File: RemoveSeparatorsFromIntegerLiteral.swift

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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2023 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//

#if swift(>=6)
public import SwiftSyntax
#else
import SwiftSyntax
#endif

/// Format an integer literal by removing any existing separators.
///
/// ## Before
///
/// ```swift
/// 123_456_789
/// 0xF_FFFF_FFFF
/// ```
/// ## After
///
/// ```swift
/// 123456789
/// 0xFFFFFFFFF
/// ```
public struct RemoveSeparatorsFromIntegerLiteral: SyntaxRefactoringProvider {
  public static func refactor(syntax lit: IntegerLiteralExprSyntax, in context: Void) -> IntegerLiteralExprSyntax? {
    guard lit.literal.text.contains("_") else {
      return lit
    }
    let formattedText = lit.literal.text.filter({ $0 != "_" })
    return lit.with(\.literal, lit.literal.with(\.tokenKind, .integerLiteral(formattedText)))
  }
}