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Introduce a separate feature to cover @freestanding(expression)

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This commit is contained in:
Doug Gregor
2023-02-07 16:15:37 -08:00
parent acb7f8efda
commit 85ba74b812
3 changed files with 13 additions and 2 deletions
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3
include/swift/Basic/Features.def
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@@ -92,6 +92,9 @@ SUPPRESSIBLE_LANGUAGE_FEATURE(PrimaryAssociatedTypes2, 346, "Primary associated
SUPPRESSIBLE_LANGUAGE_FEATURE(UnavailableFromAsync, 0, "@_unavailableFromAsync", true)
SUPPRESSIBLE_LANGUAGE_FEATURE(NoAsyncAvailability, 340, "@available(*, noasync)", true)
LANGUAGE_FEATURE(BuiltinIntLiteralAccessors, 368, "Builtin.IntLiteral accessors", true)
LANGUAGE_FEATURE(
FreestandingExpressionMacros, 0, "@freestanding(expression) macros",
langOpts.hasFeature(Feature::Macros))
UPCOMING_FEATURE(ConciseMagicFile, 274, 6)
UPCOMING_FEATURE(ForwardTrailingClosures, 286, 6)

8
lib/AST/ASTPrinter.cpp
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@@ -3171,6 +3171,14 @@ static bool usesFeatureBuiltinMacros(Decl *decl) {
static bool usesFeatureImportSymbolicCXXDecls(Decl *decl) { return false; }
static bool usesFeatureFreestandingExpressionMacros(Decl *decl) {
auto macro = dyn_cast<MacroDecl>(decl);
if (!macro)
return false;
return macro->getMacroRoles().contains(MacroRole::Expression);
}
static void
suppressingFeatureNoAsyncAvailability(PrintOptions &options,
llvm::function_ref<void()> action) {

4
test/ModuleInterface/macros.swift
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@@ -6,12 +6,12 @@
// RUN: %FileCheck %s < %t/Macros.swiftinterface --check-prefix CHECK
// RUN: %target-swift-frontend -compile-module-from-interface %t/Macros.swiftinterface -o %t/Macros.swiftmodule
// CHECK: #if compiler(>=5.3) && $Macros
// CHECK: #if compiler(>=5.3) && $FreestandingExpressionMacros && $Macros
// CHECK-NEXT: @freestanding(expression) public macro publicStringify<T>(_ value: T) -> (T, Swift.String) = #externalMacro(module: "SomeModule", type: "StringifyMacro")
// CHECK-NEXT: #endif
@freestanding(expression) public macro publicStringify<T>(_ value: T) -> (T, String) = #externalMacro(module: "SomeModule", type: "StringifyMacro")
// CHECK: #if compiler(>=5.3) && $Macros
// CHECK: #if compiler(>=5.3) && $FreestandingExpressionMacros && $Macros
// CHECK: @freestanding(expression) public macro publicLine<T>: T = #externalMacro(module: "SomeModule", type: "Line") where T : Swift.ExpressibleByIntegerLiteral
// CHECK-NEXT: #endif
@freestanding(expression) public macro publicLine<T: ExpressibleByIntegerLiteral>: T = #externalMacro(module: "SomeModule", type: "Line")