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[stdlib] Index interchange, part I

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This commit is contained in:
Dave Abrahams
2017-05-20 04:25:05 -07:00
parent fda424ba2d
commit e523c80339
16 changed files with 166 additions and 336 deletions
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39
stdlib/public/core/UnavailableStringAPIs.swift.gyb
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@@ -71,42 +71,3 @@ ${stringSubscriptComment}
% end
}
% for View in ['UTF8View', 'UTF16View', 'UnicodeScalarView', 'CharacterView']:
% Index = 'String.%s.Index' % View
% Distance = 'String.%s.IndexDistance' % View
extension ${Index} {
@available(
*, unavailable,
message: "To get the next index call 'index(after:)' on the ${View} instance that produced the index.")
public func successor() -> ${Index} {
Builtin.unreachable()
}
% if View != 'UTF8View':
@available(
*, unavailable,
message: "To get the previous index call 'index(before:)' on the ${View} instance that produced the index.")
public func predecessor() -> ${Index} {
Builtin.unreachable()
}
% end
@available(
*, unavailable,
message: "To advance an index by n steps call 'index(_:offsetBy:)' on the ${View} instance that produced the index.")
public func advancedBy(_ n: ${Distance}) -> ${Index} {
Builtin.unreachable()
}
@available(
*, unavailable,
message: "To advance an index by n steps stopping at a given limit call 'index(_:offsetBy:limitedBy:)' on ${View} instance that produced the index. Note that the Swift 3 API returns 'nil' when trying to advance past the limit; the Swift 2 API returned the limit.")
public func advancedBy(_ n: ${Distance}, limit: ${Index}) -> ${Index} {
Builtin.unreachable()
}
@available(
*, unavailable,
message: "To find the distance between two indices call 'distance(from:to:)' on the ${View} instance that produced the index.")
public func distanceTo(_ end: ${Index}) -> ${Distance} {
Builtin.unreachable()
}
}
% end