Merge pull request swiftlang#2548 from ahoppen/ahoppen/pound-if-after-attribute

Specify attributes inside `#if` before any unconditional attributes

Author: ahoppen

CodeGeneration/Sources/generate-swift-syntax/templates/swiftsyntaxbuilder/ResultBuildersFile.swift

@@ -33,8 +33,8 @@ let resultBuildersFile = SourceFileSyntax(leadingTrivia: copyrightHeader) {
       """
       // MARK: - \(type.resultBuilderType)
 
-      @resultBuilder
       \(node.node.apiAttributes())\
+      @resultBuilder
       public struct \(type.resultBuilderType): ListBuilder
       """
     ) {

Sources/SwiftSyntaxBuilder/generated/ResultBuilders.swift

@@ -431,10 +431,10 @@ public extension LabeledExprListSyntax {
 
 // MARK: - LifetimeSpecifierArgumentListBuilder
 
-@resultBuilder
 #if compiler(>=5.8)
 @_spi(ExperimentalLanguageFeatures)
 #endif
+@resultBuilder
 public struct LifetimeSpecifierArgumentListBuilder: ListBuilder {
   public typealias FinalResult = LifetimeSpecifierArgumentListSyntax
 }