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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 SyntaxProtocol {
/// Sequence of ``SyntaxClassifiedRange``s for this syntax node.
///
/// The provided classified ranges are consecutive and cover the full source
/// text of the node. The ranges may also span multiple tokens, if multiple
/// consecutive tokens would have the same classification then a single classified
/// range is provided for all of them.
public var classifications: SyntaxClassifications {
let fullRange = ByteSourceRange(offset: 0, length: totalLength.utf8Length)
return SyntaxClassifications(_syntaxNode, in: fullRange)
}
/// Sequence of ``SyntaxClassifiedRange``s contained in this syntax node within
/// a relative range.
///
/// The provided classified ranges may extend beyond the provided `range`.
/// Active classifications (non-`none`) will extend the range to include the
/// full classified range (e.g. from the beginning of the comment block), while
/// `none` classified ranges will extend to the beginning or end of the token
/// that the `range` touches.
/// It is guaranteed that no classified range will be provided that doesn't
/// intersect the provided `range`.
///
/// - Parameters:
/// - in: The relative byte range to pull ``SyntaxClassifiedRange``s from.
/// - Returns: Sequence of ``SyntaxClassifiedRange``s.
public func classifications(in range: ByteSourceRange) -> SyntaxClassifications {
return SyntaxClassifications(_syntaxNode, in: range)
}
/// The ``SyntaxClassifiedRange`` for a relative byte offset.
/// - Parameters:
/// - at: The relative to the node byte offset.
/// - Returns: The ``SyntaxClassifiedRange`` for the offset or nil if the source text
/// at the given offset is unclassified.
public func classification(at offset: Int) -> SyntaxClassifiedRange? {
let classifications = SyntaxClassifications(_syntaxNode, in: ByteSourceRange(offset: offset, length: 1))
var iterator = classifications.makeIterator()
return iterator.next()
}
/// The ``SyntaxClassifiedRange`` for an absolute position.
/// - Parameters:
/// - at: The absolute position.
/// - Returns: The ``SyntaxClassifiedRange`` for the position or nil if the source text
/// at the given position is unclassified.
public func classification(at position: AbsolutePosition) -> SyntaxClassifiedRange? {
let relativeOffset = position.utf8Offset - self.position.utf8Offset
return self.classification(at: relativeOffset)
}
}
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