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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
//
//===----------------------------------------------------------------------===//
import SwiftSyntax
extension BooleanLiteralExprSyntax {
var literalValue: Bool {
return literal.tokenKind == .keyword(.true)
}
}
extension TupleExprSyntax {
/// Whether this tuple is a parenthesized expression, e.g., (x).
var isParentheses: Bool {
return elements.singleUnlabeledExpression != nil
}
}
extension LabeledExprListSyntax {
/// If this list is a single, unlabeled expression, return it.
var singleUnlabeledExpression: ExprSyntax? {
guard count == 1, let element = first, element.label == nil else { return nil }
return element.expression
}
}
extension ExprSyntax {
/// Whether this is a simple identifier expression and, if so, what the identifier string is.
var simpleIdentifierExpr: Identifier? {
guard let identExpr = self.as(DeclReferenceExprSyntax.self) else {
return nil
}
return identExpr.simpleIdentifier
}
}
extension DeclReferenceExprSyntax {
/// If this declaration reference is a simple identifier, return that
/// string.
var simpleIdentifier: Identifier? {
guard argumentNames == nil else {
return nil
}
return baseName.identifier
}
}
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