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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)
@_spi(RawSyntax) internal import SwiftSyntax
#else
@_spi(RawSyntax) import SwiftSyntax
#endif
// MARK: - Unexpected nodes
extension RawUnexpectedNodesSyntax {
/// Returns `true` if this contains a token that satisfies `condition`.
func containsToken(where condition: (RawTokenSyntax) -> Bool) -> Bool {
return self.elements.contains(where: { node in
if let token = node.as(RawTokenSyntax.self) {
return condition(token)
} else {
return false
}
})
}
/// If `nodes` is not empty, construct a ``RawUnexpectedNodesSyntax``
/// containing those tokens, otherwise return `nil`.
init?<SyntaxType: RawSyntaxNodeProtocol>(_ nodes: [SyntaxType], arena: __shared SyntaxArena) {
if nodes.isEmpty {
return nil
} else {
self.init(elements: nodes.map(RawSyntax.init), arena: arena)
}
}
/// If `nodes` contains non-`nil` values, construct a ``RawUnexpectedNodesSyntax``
/// containing those tokens, otherwise return `nil`.
init?<SyntaxType: RawSyntaxNodeProtocol>(_ nodes: [SyntaxType?], arena: __shared SyntaxArena) {
self.init(nodes.compactMap({ $0 }), arena: arena)
}
}
// MARK: Combining unexpected nodes
/// Implementation detail of `RawUnexpectedNodesSyntax.init(combining:arena)`.
protocol UnexpectedNodesCombinable {
var elements: [RawSyntax] { get }
}
extension Array: UnexpectedNodesCombinable where Element: UnexpectedNodesCombinable {
var elements: [RawSyntax] { self.flatMap { $0.elements } }
}
extension Optional: UnexpectedNodesCombinable where Wrapped: UnexpectedNodesCombinable {
var elements: [RawSyntax] {
if let self {
return self.elements
} else {
return []
}
}
}
extension RawTokenSyntax: UnexpectedNodesCombinable {
var elements: [RawSyntax] {
return [RawSyntax(self)]
}
}
extension RawUnexpectedNodesSyntax: UnexpectedNodesCombinable {}
extension RawUnexpectedNodesSyntax {
init?(
combining syntax1: some UnexpectedNodesCombinable,
_ syntax2: some UnexpectedNodesCombinable,
arena: __shared SyntaxArena
) {
self.init(syntax1.elements + syntax2.elements, arena: arena)
}
init?(
combining syntax1: some UnexpectedNodesCombinable,
_ syntax2: some UnexpectedNodesCombinable,
_ syntax3: some UnexpectedNodesCombinable,
arena: __shared SyntaxArena
) {
self.init(syntax1.elements + syntax2.elements + syntax3.elements, arena: arena)
}
init?(
combining syntax1: some UnexpectedNodesCombinable,
_ syntax2: some UnexpectedNodesCombinable,
_ syntax3: some UnexpectedNodesCombinable,
_ syntax4: some UnexpectedNodesCombinable,
arena: __shared SyntaxArena
) {
self.init(syntax1.elements + syntax2.elements + syntax3.elements + syntax4.elements, arena: arena)
}
}
// MARK: - Misc
extension SyntaxText {
var isEditorPlaceholder: Bool {
return self.starts(with: SyntaxText("<#")) && self.hasSuffix(SyntaxText("#>"))
}
var isStartingWithUppercase: Bool {
if !self.isEmpty, let firstCharacterByte = self.baseAddress?.pointee {
return 65 <= firstCharacterByte && firstCharacterByte <= 90
} else {
return false
}
}
}
extension RawTriviaPiece {
var isIndentationWhitespace: Bool {
switch self {
case .spaces, .tabs: return true
default: return false
}
}
}
|
