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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 FunctionParameterSyntax {
/// Retrieve the name of the parameter as it is used in source.
///
/// Example:
///
/// func f(a: Int, _ b: Int, c see: Int) { ... }
///
/// The parameter names for these three parameters are `a`, `b`, and `see`,
/// respectively.
@_spi(Testing)
public var parameterName: TokenSyntax? {
// If there were two names, the second is the parameter name.
if let secondName {
if secondName.text == "_" {
return nil
}
return secondName
}
if firstName.text == "_" {
return nil
}
return firstName
}
}
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