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121 lines
3.2 KiB
Plaintext
121 lines
3.2 KiB
Plaintext
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See http://swift.org/LICENSE.txt for license information
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// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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%{
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from gyb_stdlib_support import (
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TRAVERSALS,
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collectionForTraversal,
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defaultIndicesForTraversal
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)
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}%
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% for Traversal in TRAVERSALS:
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% Self = defaultIndicesForTraversal(Traversal)
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// FIXME(ABI)(compiler limitation): There should be just one default
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// indices type that has conditional conformances to
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// `BidirectionalCollection` and `RandomAccessCollection`.
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public struct ${Self}<
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Elements : ${collectionForTraversal(Traversal).replace('Collection', 'Indexable')}
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// FIXME(ABI)(compiler limitation):
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// Elements : Collection
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> : ${collectionForTraversal(Traversal)} {
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// FIXME(compiler limitation): this typealias should be inferred.
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public typealias Index = Elements.Index
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internal init(
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_elements: Elements,
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startIndex: Elements.Index,
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endIndex: Elements.Index
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) {
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self._elements = _elements
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self._startIndex = startIndex
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self._endIndex = endIndex
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}
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public var startIndex: Elements.Index {
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return _startIndex
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}
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public var endIndex: Elements.Index {
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return _endIndex
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}
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public subscript(i: Index) -> Elements.Index {
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// FIXME: swift-3-indexing-model: range check.
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return i
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}
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// FIXME(compiler limitation): this typealias should be inferred.
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public typealias SubSequence = ${Self}<Elements>
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public subscript(bounds: Range<Index>) -> ${Self}<Elements> {
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// FIXME: swift-3-indexing-model: range check.
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return ${Self}(
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_elements: _elements,
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startIndex: bounds.lowerBound,
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endIndex: bounds.upperBound)
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}
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@warn_unused_result
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public func index(after i: Index) -> Index {
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// FIXME: swift-3-indexing-model: range check.
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return _elements.index(after: i)
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}
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public func formIndex(after i: inout Index) {
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// FIXME: swift-3-indexing-model: range check.
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_elements.formIndex(after: &i)
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}
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% if Traversal in ['Bidirectional', 'RandomAccess']:
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@warn_unused_result
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public func index(before i: Index) -> Index {
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// FIXME: swift-3-indexing-model: range check.
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return _elements.index(before: i)
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}
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public func formIndex(before i: inout Index) {
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// FIXME: swift-3-indexing-model: range check.
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_elements.formIndex(before: &i)
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}
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% end
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// FIXME(compiler limitation): this typealias should be inferred.
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public typealias Indices = ${Self}<Elements>
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public var indices: Indices {
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return self
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}
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internal var _elements: Elements
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internal var _startIndex: Elements.Index
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internal var _endIndex: Elements.Index
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}
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extension ${collectionForTraversal(Traversal)} where Indices == ${Self}<Self> {
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public var indices: ${Self}<Self> {
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return ${Self}(
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_elements: self,
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startIndex: self.startIndex,
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endIndex: self.endIndex)
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}
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}
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% end
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// ${'Local Variables'}:
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// eval: (read-only-mode 1)
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// End:
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