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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2025 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
/// Common protocol implemented by expression syntax types that support calling another expression.
protocol CallingExprSyntaxProtocol: ExprSyntaxProtocol {
var calledExpression: ExprSyntax { get }
}
extension FunctionCallExprSyntax: CallingExprSyntaxProtocol {}
extension SubscriptCallExprSyntax: CallingExprSyntaxProtocol {}
extension Syntax {
func asProtocol(_: CallingExprSyntaxProtocol.Protocol) -> CallingExprSyntaxProtocol? {
return self.asProtocol(SyntaxProtocol.self) as? CallingExprSyntaxProtocol
}
func isProtocol(_: CallingExprSyntaxProtocol.Protocol) -> Bool {
return self.asProtocol(CallingExprSyntaxProtocol.self) != nil
}
}
extension ExprSyntax {
func asProtocol(_: CallingExprSyntaxProtocol.Protocol) -> CallingExprSyntaxProtocol? {
return Syntax(self).asProtocol(SyntaxProtocol.self) as? CallingExprSyntaxProtocol
}
func isProtocol(_: CallingExprSyntaxProtocol.Protocol) -> Bool {
return self.asProtocol(CallingExprSyntaxProtocol.self) != nil
}
}
/// Common protocol implemented by expression syntax types that are expressed as a modified
/// subexpression of the form `<keyword> <subexpr>`.
protocol KeywordModifiedExprSyntaxProtocol: ExprSyntaxProtocol {
var expression: ExprSyntax { get }
}
extension AwaitExprSyntax: KeywordModifiedExprSyntaxProtocol {}
extension TryExprSyntax: KeywordModifiedExprSyntaxProtocol {}
extension UnsafeExprSyntax: KeywordModifiedExprSyntaxProtocol {}
extension Syntax {
func asProtocol(_: KeywordModifiedExprSyntaxProtocol.Protocol) -> KeywordModifiedExprSyntaxProtocol? {
return self.asProtocol(SyntaxProtocol.self) as? KeywordModifiedExprSyntaxProtocol
}
func isProtocol(_: KeywordModifiedExprSyntaxProtocol.Protocol) -> Bool {
return self.asProtocol(KeywordModifiedExprSyntaxProtocol.self) != nil
}
}
extension ExprSyntax {
func asProtocol(_: KeywordModifiedExprSyntaxProtocol.Protocol) -> KeywordModifiedExprSyntaxProtocol? {
return Syntax(self).asProtocol(SyntaxProtocol.self) as? KeywordModifiedExprSyntaxProtocol
}
func isProtocol(_: KeywordModifiedExprSyntaxProtocol.Protocol) -> Bool {
return self.asProtocol(KeywordModifiedExprSyntaxProtocol.self) != nil
}
}
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