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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
import SwiftSyntaxBuilder
import SyntaxSupport
import Utils
let syntaxAnyVisitorFile = SourceFileSyntax(leadingTrivia: copyrightHeader) {
try! ClassDeclSyntax(
"""
/// A `SyntaxVisitor` that can visit the nodes as generic ``Syntax`` values.
///
/// This subclass of `SyntaxVisitor` is slower than the type-specific visitation
/// of `SyntaxVisitor`. Use `SyntaxAnyVisitor` if the `visitAny(_)` function
/// would be useful to have, otherwise inherit from `SyntaxVisitor`.
///
/// This works by overriding the type-specific visit function that delegate to
/// `visitAny(_)`. A subclass that provides a custom type-specific visit
/// function, should also call `visitAny(_)` in its implementation, if calling
/// `visitAny` is needed:
///
/// ```swift
/// struct MyVisitor: SyntaxAnyVisitor {
/// func visitAny(_ node: Syntax) -> SyntaxVisitorContinueKind {
/// <code>
/// }
///
/// func visit(_ token: TokenSyntax) -> SyntaxVisitorContinueKind {
/// <code>
/// // Call this to pass tokens to `visitAny(_)` as well if needed
/// visitAny(token)
/// }
/// }
/// ```
open class SyntaxAnyVisitor: SyntaxVisitor
"""
) {
DeclSyntax(
"""
open func visitAny(_ node: Syntax) -> SyntaxVisitorContinueKind {
return .visitChildren
}
"""
)
DeclSyntax(
"""
/// The function called after visiting the node and its descendants.
/// - node: the node we just finished visiting.
open func visitAnyPost(_ node: Syntax) {}
"""
)
DeclSyntax(
"""
// MARK: Override type specific visit methods
override open func visit(_ token: TokenSyntax) -> SyntaxVisitorContinueKind {
return visitAny(token._syntaxNode)
}
"""
)
DeclSyntax(
"""
override open func visitPost(_ node: TokenSyntax) {
visitAnyPost(node._syntaxNode)
}
"""
)
for node in SYNTAX_NODES where !node.kind.isBase {
DeclSyntax(
"""
\(node.apiAttributes())\
override open func visit(_ node: \(node.kind.syntaxType)) -> SyntaxVisitorContinueKind {
return visitAny(node._syntaxNode)
}
"""
)
DeclSyntax(
"""
\(node.apiAttributes())\
override open func visitPost(_ node: \(node.kind.syntaxType)) {
visitAnyPost(node._syntaxNode)
}
"""
)
}
}
}
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