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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
extension IntegerLiteralExprSyntax {
/// Returns an (arbitrarily) "ideal" number of digits that should constitute
/// a separator-delimited "group" in an integer literal.
var idealGroupSize: Int {
switch self.radix {
case .binary: return 4
case .octal: return 3
case .decimal: return 3
case .hex: return 4
}
}
/// Split the leading radix prefix from the value part of this integer literal.
///
/// ```
/// 10 -> ("", "10")
/// 0xFFFF -> ("0x", "FFFF")
/// 0o77 -> ("0o", "77")
/// 0b1010101 -> ("0b", "1010101")
/// ```
public func split() -> (prefix: String, value: Substring) {
let text = self.literal.text
let radix = self.radix
let literalPrefix = radix.literalPrefix
return (literalPrefix, text.dropFirst(literalPrefix.count))
}
}
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