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proposals.xml
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<?xml version="1.0" encoding="UTF-8"?>
<!--
The proposal status page at apple.github.io/swift-evolution is rendered from
this list using proposal-status.xsl; however, since this XML document lives on
the repo's master branch, the status page (index.html on the gh-pages branch)
just loads it via JavaScript. Hence, the following declaration isn't used.
<?xml-stylesheet type="text/xsl" href="proposal-status.xsl"?>
-->
<proposals>
<proposal id="0001" status="implemented" swift-version="2.2" name="Allow (most) keywords as argument labels" filename="0001-keywords-as-argument-labels.md"/>
<proposal id="0002" status="implemented" swift-version="3" name="Removing currying `func` declaration syntax" filename="0002-remove-currying.md"/>
<proposal id="0003" status="implemented" swift-version="3" name="Removing `var` from Function Parameters" filename="0003-remove-var-parameters.md"/>
<proposal id="0004" status="implemented" swift-version="3" name="Remove the `++` and `--` operators" filename="0004-remove-pre-post-inc-decrement.md"/>
<proposal id="0005" status="implemented" swift-version="3" name="Better Translation of Objective-C APIs Into Swift" filename="0005-objective-c-name-translation.md"/>
<proposal id="0006" status="implemented" swift-version="3" name="Apply API Guidelines to the Standard Library" filename="0006-apply-api-guidelines-to-the-standard-library.md"/>
<proposal id="0007" status="implemented" swift-version="3" name="Remove C-style for-loops with conditions and incrementers" filename="0007-remove-c-style-for-loops.md"/>
<proposal id="0008" status="implemented" swift-version="3" name="Add a Lazy flatMap for Sequences of Optionals" filename="0008-lazy-flatmap-for-optionals.md"/>
<proposal id="0009" status="rejected" name="Require self for accessing instance members" filename="0009-require-self-for-accessing-instance-members.md"/>
<proposal id="0010" status="rejected" name="Add StaticString.UnicodeScalarView" filename="0010-add-staticstring-unicodescalarview.md"/>
<proposal id="0011" status="implemented" swift-version="2.2" name="Replace `typealias` keyword with `associatedtype` for associated type declarations" filename="0011-replace-typealias-associated.md"/>
<proposal id="0012" status="rejected" name="Add `@noescape` to public library API" filename="0012-add-noescape-to-public-library-api.md"/>
<proposal id="0013" status="rejected" name="Remove Partial Application of Non-Final Super Methods (Swift 2.2)" filename="0013-remove-partial-application-super.md"/>
<proposal id="0014" status="implemented" swift-version="2.2" name="Constraining `AnySequence.init`" filename="0014-constrained-AnySequence.md"/>
<proposal id="0015" status="implemented" swift-version="2.2" name="Tuple comparison operators" filename="0015-tuple-comparison-operators.md"/>
<proposal id="0016" status="implemented" swift-version="3" name="Adding initializers to Int and UInt to convert from UnsafePointer and UnsafeMutablePointer" filename="0016-initializers-for-converting-unsafe-pointers-to-ints.md"/>
<proposal id="0017" status="implemented" swift-version="3" name="Change `Unmanaged` to use `UnsafePointer`" filename="0017-convert-unmanaged-to-use-unsafepointer.md"/>
<proposal id="0018" status="deferred" name="Flexible Memberwise Initialization" filename="0018-flexible-memberwise-initialization.md"/>
<proposal id="0019" status="implemented" swift-version="3" name="Swift Testing" filename="0019-package-manager-testing.md"/>
<proposal id="0020" status="implemented" swift-version="2.2" name="Swift Language Version Build Configuration" filename="0020-if-swift-version.md"/>
<proposal id="0021" status="implemented" swift-version="2.2" name="Naming Functions with Argument Labels" filename="0021-generalized-naming.md"/>
<proposal id="0022" status="implemented" swift-version="2.2" name="Referencing the Objective-C selector of a method" filename="0022-objc-selectors.md"/>
<proposal id="0023" status="implemented" swift-version="3" name="API Design Guidelines" filename="0023-api-guidelines.md"/>
<proposal id="0024" status="rejected" name="Optional Value Setter `??=`" filename="0024-optional-value-setter.md"/>
<proposal id="0025" status="implemented" swift-version="3" name="Scoped Access Level" filename="0025-scoped-access-level.md"/>
<proposal id="0026" status="deferred" name="Abstract classes and methods" filename="0026-abstract-classes-and-methods.md"/>
<proposal id="0027" status="rejected" name="Expose code unit initializers on String" filename="0027-string-from-code-units.md"/>
<proposal id="0028" status="implemented" swift-version="3" name="Modernizing Swift's Debugging Identifiers (__FILE__, etc)" filename="0028-modernizing-debug-identifiers.md"/>
<proposal id="0029" status="implemented" swift-version="3" name="Remove implicit tuple splat behavior from function applications" filename="0029-remove-implicit-tuple-splat.md"/>
<proposal id="0030" status="deferred" name="Property Behaviors" filename="0030-property-behavior-decls.md"/>
<proposal id="0031" status="implemented" swift-version="3" name="Adjusting inout Declarations for Type Decoration" filename="0031-adjusting-inout-declarations.md"/>
<proposal id="0032" status="implemented" swift-version="3" name="Add `first(where:)` method to `SequenceType`" filename="0032-sequencetype-find.md"/>
<proposal id="0033" status="implemented" swift-version="3" name="Import Objective-C Constants as Swift Types" filename="0033-import-objc-constants.md"/>
<proposal id="0034" status="implemented" swift-version="3" name="Disambiguating Line Control Statements from Debugging Identifiers" filename="0034-disambiguating-line.md"/>
<proposal id="0035" status="implemented" swift-version="3" name="Limiting `inout` capture to `@noescape` contexts" filename="0035-limit-inout-capture.md"/>
<proposal id="0036" status="implemented" swift-version="3" name="Requiring Leading Dot Prefixes for Enum Instance Member Implementations" filename="0036-enum-dot.md"/>
<proposal id="0037" status="implemented" swift-version="3" name="Clarify interaction between comments & operators" filename="0037-clarify-comments-and-operators.md"/>
<proposal id="0038" status="implemented" swift-version="3" name="Package Manager C Language Target Support" filename="0038-swiftpm-c-language-targets.md"/>
<proposal id="0039" status="implemented" swift-version="3" name="Modernizing Playground Literals" filename="0039-playgroundliterals.md"/>
<proposal id="0040" status="implemented" swift-version="3" name="Replacing Equal Signs with Colons For Attribute Arguments" filename="0040-attributecolons.md"/>
<proposal id="0041" status="rejected" name="Updating Protocol Naming Conventions for Conversions" filename="0041-conversion-protocol-conventions.md"/>
<proposal id="0042" status="accepted" name="Flattening the function type of unapplied method references" filename="0042-flatten-method-types.md"/>
<proposal id="0043" status="implemented" swift-version="3" name="Declare variables in 'case' labels with multiple patterns" filename="0043-declare-variables-in-case-labels-with-multiple-patterns.md"/>
<proposal id="0044" status="implemented" swift-version="3" name="Import as Member" filename="0044-import-as-member.md"/>
<proposal id="0045" status="accepted" name="Add prefix(while:) and drop(while:) to the stdlib" filename="0045-scan-takewhile-dropwhile.md"/>
<proposal id="0046" status="implemented" swift-version="3" name="Establish consistent label behavior across all parameters including first labels" filename="0046-first-label.md"/>
<proposal id="0047" status="implemented" swift-version="3" name="Defaulting non-Void functions so they warn on unused results" filename="0047-nonvoid-warn.md"/>
<proposal id="0048" status="implemented" swift-version="3" name="Generic Type Aliases" filename="0048-generic-typealias.md"/>
<proposal id="0049" status="implemented" swift-version="3" name="Move @noescape and @autoclosure to be type attributes" filename="0049-noescape-autoclosure-type-attrs.md"/>
<proposal id="0050" status="rejected" name="Decoupling Floating Point Strides from Generic Implementations" filename="0050-floating-point-stride.md"/>
<proposal id="0051" status="rejected" name="Conventionalizing stride semantics" filename="0051-stride-semantics.md"/>
<proposal id="0052" status="implemented" swift-version="3" name="Change IteratorType post-nil guarantee" filename="0052-iterator-post-nil-guarantee.md"/>
<proposal id="0053" status="implemented" swift-version="3" name="Remove explicit use of `let` from Function Parameters" filename="0053-remove-let-from-function-parameters.md"/>
<proposal id="0054" status="implemented" swift-version="3" name="Abolish `ImplicitlyUnwrappedOptional` type" filename="0054-abolish-iuo.md"/>
<proposal id="0055" status="implemented" swift-version="3" name="Make unsafe pointer nullability explicit using Optional" filename="0055-optional-unsafe-pointers.md"/>
<proposal id="0056" status="rejected" name="Allow trailing closures in `guard` conditions" filename="0056-trailing-closures-in-guard.md"/>
<proposal id="0057" status="implemented" swift-version="3" name="Importing Objective-C Lightweight Generics" filename="0057-importing-objc-generics.md"/>
<proposal id="0058" status="deferred" name="Allow Swift types to provide custom Objective-C representations" filename="0058-objectivecbridgeable.md"/>
<proposal id="0059" status="implemented" swift-version="3" name="Update API Naming Guidelines and Rewrite Set APIs Accordingly" filename="0059-updated-set-apis.md"/>
<proposal id="0060" status="implemented" swift-version="3" name="Enforcing order of defaulted parameters" filename="0060-defaulted-parameter-order.md"/>
<proposal id="0061" status="implemented" swift-version="3" name="Add Generic Result and Error Handling to autoreleasepool()" filename="0061-autoreleasepool-signature.md"/>
<proposal id="0062" status="implemented" swift-version="3" name="Referencing Objective-C key-paths" filename="0062-objc-keypaths.md"/>
<proposal id="0063" status="implemented" swift-version="3" name="SwiftPM System Module Search Paths" filename="0063-swiftpm-system-module-search-paths.md"/>
<proposal id="0064" status="implemented" swift-version="3" name="Referencing the Objective-C selector of property getters and setters" filename="0064-property-selectors.md"/>
<proposal id="0065" status="implemented" swift-version="3" name="A New Model For Collections and Indices" filename="0065-collections-move-indices.md"/>
<proposal id="0066" status="implemented" swift-version="3" name="Standardize function type argument syntax to require parentheses" filename="0066-standardize-function-type-syntax.md"/>
<proposal id="0067" status="implemented" swift-version="3" name="Enhanced Floating Point Protocols" filename="0067-floating-point-protocols.md"/>
<proposal id="0068" status="accepted" name="Expanding Swift `Self` to class members and value types" filename="0068-universal-self.md"/>
<proposal id="0069" status="implemented" swift-version="3" name="Mutability and Foundation Value Types" filename="0069-swift-mutability-for-foundation.md"/>
<proposal id="0070" status="implemented" swift-version="3" name="Make Optional Requirements Objective-C-only" filename="0070-optional-requirements.md"/>
<proposal id="0071" status="implemented" swift-version="3" name="Allow (most) keywords in member references" filename="0071-member-keywords.md"/>
<proposal id="0072" status="implemented" swift-version="3" name="Fully eliminate implicit bridging conversions from Swift" filename="0072-eliminate-implicit-bridging-conversions.md"/>
<proposal id="0073" status="rejected" name="Marking closures as executing exactly once" filename="0073-noescape-once.md"/>
<proposal id="0074" status="rejected" name="Implementation of Binary Search functions" filename="0074-binary-search.md"/>
<proposal id="0075" status="accepted" name="Adding a Build Configuration Import Test" filename="0075-import-test.md"/>
<proposal id="0076" status="implemented" swift-version="3" name="Add overrides taking an UnsafePointer source to non-destructive copying methods on UnsafeMutablePointer" filename="0076-copying-to-unsafe-mutable-pointer-with-unsafe-pointer-source.md"/>
<proposal id="0077" status="implemented" swift-version="3" name="Improved operator declarations" filename="0077-operator-precedence.md"/>
<proposal id="0078" status="deferred" name="Implement a rotate algorithm, equivalent to std::rotate() in C++" filename="0078-rotate-algorithm.md"/>
<proposal id="0079" status="deferred" name="Allow using optional binding to upgrade `self` from a weak to strong reference" filename="0079-upgrade-self-from-weak-to-strong.md"/>
<proposal id="0080" status="accepted" name="Failable Numeric Conversion Initializers" filename="0080-failable-numeric-initializers.md"/>
<proposal id="0081" status="implemented" swift-version="3" name="Move `where` clause to end of declaration" filename="0081-move-where-expression.md"/>
<proposal id="0082" status="accepted" name="Package Manager Editable Packages" filename="0082-swiftpm-package-edit.md"/>
<proposal id="0083" status="deferred" name="Remove bridging conversion behavior from dynamic casts" filename="0083-remove-bridging-from-dynamic-casts.md"/>
<proposal id="0084" status="rejected" name="Allow trailing commas in parameter lists and tuples" filename="0084-trailing-commas.md"/>
<proposal id="0085" status="implemented" swift-version="3" name="Package Manager Command Names" filename="0085-package-manager-command-name.md"/>
<proposal id="0086" status="implemented" swift-version="3" name="Drop NS Prefix in Swift Foundation" filename="0086-drop-foundation-ns.md"/>
<proposal id="0087" status="rejected" name="Rename `lazy` to `@lazy`" filename="0087-lazy-attribute.md"/>
<proposal id="0088" status="implemented" swift-version="3" name="Modernize libdispatch for Swift 3 naming conventions" filename="0088-libdispatch-for-swift3.md"/>
<proposal id="0089" status="implemented" swift-version="3" name="Renaming `String.init<T>(_: T)`" filename="0089-rename-string-reflection-init.md"/>
<proposal id="0090" status="deferred" name="Remove `.self` and freely allow type references in expressions" filename="0090-remove-dot-self.md"/>
<proposal id="0091" status="implemented" swift-version="3" name="Improving operator requirements in protocols" filename="0091-improving-operators-in-protocols.md"/>
<proposal id="0092" status="implemented" swift-version="3" name="Typealiases in protocols and protocol extensions" filename="0092-typealiases-in-protocols.md"/>
<proposal id="0093" status="implemented" swift-version="3" name="Adding a public `base` property to slices" filename="0093-slice-base.md"/>
<proposal id="0094" status="implemented" swift-version="3" name="Add sequence(first:next:) and sequence(state:next:) to the stdlib" filename="0094-sequence-function.md"/>
<proposal id="0095" status="implemented" swift-version="3" name="Replace `protocol<P1,P2>` syntax with `P1 & P2` syntax" filename="0095-any-as-existential.md"/>
<proposal id="0096" status="implemented" swift-version="3" name="Converting dynamicType from a property to an operator" filename="0096-dynamictype.md"/>
<proposal id="0097" status="rejected" name="Normalizing naming for "negative" attributes" filename="0097-negative-attributes.md"/>
<proposal id="0098" status="rejected" name="Lowercase `didSet` and `willSet` for more consistent keyword casing" filename="0098-didset-capitalization.md"/>
<proposal id="0099" status="implemented" swift-version="3" name="Restructuring Condition Clauses" filename="0099-conditionclauses.md"/>
<proposal id="0100" status="deferred" name="Add sequence-based initializers and merge methods to Dictionary" filename="0100-add-sequence-based-init-and-merge-to-dictionary.md"/>
<proposal id="0101" status="implemented" swift-version="3" name="Reconfiguring `sizeof` and related functions into a unified `MemoryLayout` struct" filename="0101-standardizing-sizeof-naming.md"/>
<proposal id="0102" status="implemented" swift-version="3" name="Remove `@noreturn` attribute and introduce an empty `Never` type" filename="0102-noreturn-bottom-type.md"/>
<proposal id="0103" status="implemented" swift-version="3" name="Make non-escaping closures the default" filename="0103-make-noescape-default.md"/>
<proposal id="0104" status="accepted" name="Protocol-oriented integers" filename="0104-improved-integers.md"/>
<proposal id="0105" status="rejected" name="Removing Where Clauses from For-In Loops" filename="0105-remove-where-from-forin-loops.md"/>
<proposal id="0106" status="implemented" swift-version="3" name="Add a `macOS` Alias for the `OSX` Platform Configuration Test" filename="0106-rename-osx-to-macos.md"/>
<proposal id="0107" status="implemented" swift-version="3" name="UnsafeRawPointer API" filename="0107-unsaferawpointer.md"/>
<proposal id="0108" status="rejected" name="Remove associated type inference" filename="0108-remove-assoctype-inference.md"/>
<proposal id="0109" status="implemented" swift-version="3" name="Remove the `Boolean` protocol" filename="0109-remove-boolean.md"/>
<proposal id="0110" status="accepted" name="Distinguish between single-tuple and multiple-argument function types" filename="0110-distingish-single-tuple-arg.md"/>
<proposal id="0111" status="implemented" swift-version="3" name="Remove type system significance of function argument labels" filename="0111-remove-arg-label-type-significance.md"/>
<proposal id="0112" status="implemented" swift-version="3" name="Improved NSError Bridging" filename="0112-nserror-bridging.md"/>
<proposal id="0113" status="implemented" swift-version="3" name="Add integral rounding functions to FloatingPoint" filename="0113-rounding-functions-on-floatingpoint.md"/>
<proposal id="0114" status="implemented" swift-version="3" name="Updating Buffer "Value" Names to "Header" Names" filename="0114-buffer-naming.md"/>
<proposal id="0115" status="implemented" swift-version="3" name="Rename Literal Syntax Protocols" filename="0115-literal-syntax-protocols.md"/>
<proposal id="0116" status="implemented" swift-version="3" name="Import Objective-C `id` as Swift `Any` type" filename="0116-id-as-any.md"/>
<proposal id="0117" status="implemented" swift-version="3" name="Allow distinguishing between public access and public overridability" filename="0117-non-public-subclassable-by-default.md"/>
<proposal id="0118" status="implemented" swift-version="3" name="Closure Parameter Names and Labels" filename="0118-closure-parameter-names-and-labels.md"/>
<proposal id="0119" status="rejected" name="Remove access modifiers from extensions" filename="0119-extensions-access-modifiers.md"/>
<proposal id="0120" status="implemented" swift-version="3" name="Revise `partition` Method Signature" filename="0120-revise-partition-method.md"/>
<proposal id="0121" status="implemented" swift-version="3" name="Remove `Optional` Comparison Operators" filename="0121-remove-optional-comparison-operators.md"/>
<proposal id="0122" status="rejected" name="Use colons for subscript declarations" filename="0122-use-colons-for-subscript-type-declarations.md"/>
<proposal id="0123" status="rejected" name="Disallow coercion to optionals in operator arguments" filename="0123-disallow-value-to-optional-coercion-in-operator-arguments.md"/>
<proposal id="0124" status="implemented" swift-version="3" name="`Int.init(ObjectIdentifier)` and `UInt.init(ObjectIdentifier)` should have a `bitPattern:` label" filename="0124-bitpattern-label-for-int-initializer-objectidentfier.md"/>
<proposal id="0125" status="implemented" swift-version="3" name="Remove `NonObjectiveCBase` and `isUniquelyReferenced`" filename="0125-remove-nonobjectivecbase.md"/>
<proposal id="0126" status="rejected" name="Refactor Metatypes, repurpose `T.self` and `Mirror`" filename="0126-refactor-metatypes-repurpose-t-dot-self-and-mirror.md"/>
<proposal id="0127" status="implemented" swift-version="3" name="Cleaning up stdlib Pointer and Buffer Routines" filename="0127-cleaning-up-stdlib-ptr-buffer.md"/>
<proposal id="0128" status="implemented" swift-version="3" name="Change failable UnicodeScalar initializers to failable" filename="0128-unicodescalar-failable-initializer.md"/>
<proposal id="0129" status="implemented" swift-version="3" name="Package Manager Test Naming Conventions" filename="0129-package-manager-test-naming-conventions.md"/>
<proposal id="0130" status="implemented" swift-version="3" name="Replace repeating `Character` and `UnicodeScalar` forms of String.init" filename="0130-string-initializers-cleanup.md"/>
<proposal id="0131" status="implemented" swift-version="3" name="Add `AnyHashable` to the standard library" filename="0131-anyhashable.md"/>
<proposal id="0132" status="deferred" name="Rationalizing Sequence end-operation names" filename="0132-sequence-end-ops.md"/>
<proposal id="0133" status="implemented" swift-version="3" name="Rename `flatten()` to `joined()`" filename="0133-rename-flatten-to-joined.md"/>
<proposal id="0134" status="implemented" swift-version="3" name="Rename two UTF8-related properties on String" filename="0134-rename-string-properties.md"/>
<proposal id="0135" status="implemented" swift-version="3" name="Package Manager Support for Differentiating Packages by Swift version" filename="0135-package-manager-support-for-differentiating-packages-by-swift-version.md"/>
<proposal id="0136" status="active" name="Memory Layout of Values" filename="0136-memory-layout-of-values.md"/>
<proposal id="0137" status="active" name="Avoiding Lock-In to Legacy Protocol Designs" filename="0137-avoiding-lock-in.md"/>
<!--
Recognized values for a proposal's status:
implemented, accepted, active, scheduled, awaiting, deferred, returned, rejected
Note: status="implemented" also requires swift-version="XX".
-->
</proposals>