add conformance availability data to overloaded declarations (#1009)

rdar://122589806

Sources/SwiftDocC/Model/Rendering/RenderSectionTranslator/DeclarationsSectionTranslator.swift

@@ -13,7 +13,8 @@ import SymbolKit
 
 typealias OverloadDeclaration = (
     declaration: [SymbolGraph.Symbol.DeclarationFragments.Fragment],
-    reference: ResolvedTopicReference
+    reference: ResolvedTopicReference,
+    conformance: ConformanceSection?
 )
 
 /// Translates a symbol's declaration into a render node's Declarations section.
@@ -141,7 +142,9 @@ struct DeclarationsSectionTranslator: RenderSectionTranslator {
                         commonFragments: commonFragments)
                     otherDeclarations.append(.init(
                         tokens: translatedDeclaration,
-                        identifier: overloadDeclaration.reference.absoluteString))
+                        identifier: overloadDeclaration.reference.absoluteString,
+                        conformance: overloadDeclaration.conformance
+                    ))
 
                     // Add a topic reference to the overload
                     renderNodeTranslator.collectedTopicReferences.append(
@@ -160,6 +163,8 @@ struct DeclarationsSectionTranslator: RenderSectionTranslator {
                         return nil
                     }
 
+                    let conformance = renderNodeTranslator.contentRenderer.conformanceSectionFor(overloadReference, collectedConstraints: [:])
+
                     let declarationFragments = overload.declarationVariants[trait]?.values
                         .first?
                         .declarationFragments
@@ -168,7 +173,7 @@ struct DeclarationsSectionTranslator: RenderSectionTranslator {
                         "Overloaded symbols must have declaration fragments."
                     )
                     return declarationFragments.map({
-                        (declaration: $0, reference: overloadReference)
+                        (declaration: $0, reference: overloadReference, conformance: conformance)
                     })
                 }
 
@@ -204,13 +209,13 @@ struct DeclarationsSectionTranslator: RenderSectionTranslator {
                     // Pre-process the declarations by splitting text fragments apart to increase legibility
                     let mainDeclaration = declaration.declarationFragments.flatMap(preProcessFragment(_:))
                     let processedOverloadDeclarations = overloadDeclarations.map({
-                        OverloadDeclaration($0.declaration.flatMap(preProcessFragment(_:)), $0.reference)
+                        OverloadDeclaration($0.declaration.flatMap(preProcessFragment(_:)), $0.reference, $0.conformance)
                     })
 
                     // Collect the "common fragments" so we can highlight the ones that are different
                     // in each declaration
                     let commonFragments = commonFragments(
-                        for: (mainDeclaration, renderNode.identifier),
+                        for: (mainDeclaration, renderNode.identifier, nil),
                         overloadDeclarations: processedOverloadDeclarations)
 
                     renderedTokens = translateDeclaration(

Sources/SwiftDocC/Model/Rendering/Symbol/DeclarationsRenderSection.swift

@@ -184,11 +184,14 @@ public struct DeclarationRenderSection: Codable, Equatable {
 
             /// The symbol's identifier.
             public let identifier: String
-
+
+            public let conformance: ConformanceSection?
+
             /// Creates a new other declaration for a symbol that is connected to this one, e.g. an overload.
-            public init(tokens: [Token], identifier: String) {
+            public init(tokens: [Token], identifier: String, conformance: ConformanceSection? = nil) {
                 self.tokens = tokens
                 self.identifier = identifier
+                self.conformance = conformance
             }
         }
         /// The displayable declarations for this symbol's overloads.

Sources/SwiftDocC/SwiftDocC.docc/Resources/RenderNode.spec.json

@@ -2591,6 +2591,9 @@
                      },
                      "identifier": {
                          "type": "string"
+                     },
+                     "conformance": {
+                         "$ref" : "#/components/schemas/ConformanceSection"
                      }
                 }
             },

Tests/SwiftDocCTests/Rendering/DeclarationsRenderSectionTests.swift

@@ -356,6 +356,50 @@ class DeclarationsRenderSectionTests: XCTestCase {
             XCTAssert(declarations.tokens.allSatisfy({ $0.highlight == nil }))
         }
     }
+
+    func testOverloadConformanceDataIsSavedWithDeclarations() throws {
+        enableFeatureFlag(\.isExperimentalOverloadedSymbolPresentationEnabled)
+
+        let symbolGraphFile = Bundle.module.url(
+            forResource: "ConformanceOverloads",
+            withExtension: "symbols.json",
+            subdirectory: "Test Resources"
+        )!
+
+        let tempURL = try createTempFolder(content: [
+            Folder(name: "unit-test.docc", content: [
+                InfoPlist(displayName: "ConformanceOverloads", identifier: "com.test.example"),
+                CopyOfFile(original: symbolGraphFile),
+            ])
+        ])
+
+        let (_, bundle, context) = try loadBundle(from: tempURL)
+
+        // MyClass<T>
+        // - myFunc() where T: Equatable
+        // - myFunc() where T: Hashable // <- overload group
+        let reference = ResolvedTopicReference(
+            bundleIdentifier: bundle.identifier,
+            path: "/documentation/ConformanceOverloads/MyClass/myFunc()",
+            sourceLanguage: .swift
+        )
+        let symbol = try XCTUnwrap(context.entity(with: reference).semantic as? Symbol)
+        var translator = RenderNodeTranslator(context: context, bundle: bundle, identifier: reference)
+        let renderNode = try XCTUnwrap(translator.visitSymbol(symbol) as? RenderNode)
+        let declarationsSection = try XCTUnwrap(renderNode.primaryContentSections.compactMap({ $0 as? DeclarationsRenderSection }).first)
+        XCTAssertEqual(declarationsSection.declarations.count, 1)
+        let declarations = try XCTUnwrap(declarationsSection.declarations.first)
+
+        let otherDeclarations = try XCTUnwrap(declarations.otherDeclarations)
+        XCTAssertEqual(otherDeclarations.declarations.count, 1)
+
+        XCTAssertEqual(otherDeclarations.declarations.first?.conformance?.constraints, [
+            .codeVoice(code: "T"),
+            .text(" conforms to "),
+            .codeVoice(code: "Equatable"),
+            .text("."),
+        ])
+    }
 }
 
 /// Render a list of declaration tokens as a plain-text decoration and as a plain-text rendering of which characters are highlighted.