[swift] add had<ArrayName> property for arrays to check presence in a message (#7280)

scripts/generate_code.py

@@ -399,6 +399,7 @@ flatc(
     prefix=swift_prefix,
 )
 flatc(SWIFT_OPTS, schema="optional_scalars.fbs", prefix=swift_prefix)
+flatc(SWIFT_OPTS, schema="vector_has_test.fbs", prefix=swift_prefix)
 flatc(
     SWIFT_OPTS + ["--gen-object-api"],
     schema="more_defaults.fbs",

src/idl_gen_swift.cpp

@@ -835,6 +835,9 @@ class SwiftGenerator : public BaseGenerator {
     std::string const_string = "return o == 0 ? {{CONSTANT}} : ";
     const auto vectortype = field.value.type.VectorType();
     code_.SetValue("SIZE", NumToString(InlineSize(vectortype)));
+    code_.SetValue("HAS_FIELDVAR", namer_.Variable("has", field));
+    code_ += "{{ACCESS_TYPE}} var {{HAS_FIELDVAR}}: Bool { " + GenOffset() +
+             "return o == 0 ? false : true }";
     code_ += "{{ACCESS_TYPE}} var {{FIELDVAR}}Count: Int32 { " + GenOffset() +
              "return o == 0 ? 0 : {{ACCESS}}.vector(count: o) }";
     code_.SetValue("CONSTANT", IsScalar(vectortype.base_type) ? "0" : "nil");

tests/FlatBuffers.Test.Swift/Sources/SwiftFlatBuffers/fuzzer_generated.swift

@@ -222,9 +222,11 @@ public struct Monster: FlatBufferObject, Verifiable {
   public var hp: Int16 { let o = _accessor.offset(VTOFFSET.hp.v); return o == 0 ? 100 : _accessor.readBuffer(of: Int16.self, at: o) }
   public var name: String! { let o = _accessor.offset(VTOFFSET.name.v); return _accessor.string(at: o) }
   public var nameSegmentArray: [UInt8]! { return _accessor.getVector(at: VTOFFSET.name.v) }
+  public var hasTestarrayoftables: Bool { let o = _accessor.offset(VTOFFSET.testarrayoftables.v); return o == 0 ? false : true }
   public var testarrayoftablesCount: Int32 { let o = _accessor.offset(VTOFFSET.testarrayoftables.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func testarrayoftables(at index: Int32) -> Monster? { let o = _accessor.offset(VTOFFSET.testarrayoftables.v); return o == 0 ? nil : Monster(_accessor.bb, o: _accessor.indirect(_accessor.vector(at: o) + index * 4)) }
   public func testarrayoftablesBy(key: String) -> Monster? { let o = _accessor.offset(VTOFFSET.testarrayoftables.v); return o == 0 ? nil : Monster.lookupByKey(vector: _accessor.vector(at: o), key: key, fbb: _accessor.bb) }
+  public var hasInventory: Bool { let o = _accessor.offset(VTOFFSET.inventory.v); return o == 0 ? false : true }
   public var inventoryCount: Int32 { let o = _accessor.offset(VTOFFSET.inventory.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func inventory(at index: Int32) -> UInt8 { let o = _accessor.offset(VTOFFSET.inventory.v); return o == 0 ? 0 : _accessor.directRead(of: UInt8.self, offset: _accessor.vector(at: o) + index * 1) }
   public var inventory: [UInt8] { return _accessor.getVector(at: VTOFFSET.inventory.v) ?? [] }
@@ -243,7 +245,7 @@ public struct Monster: FlatBufferObject, Verifiable {
     pos: Vec3? = nil,
     mana: Int16 = 150,
     hp: Int16 = 100,
-    nameOffset name: Offset = Offset(),
+    nameOffset name: Offset,
     testarrayoftablesVectorOffset testarrayoftables: Offset = Offset(),
     inventoryVectorOffset inventory: Offset = Offset(),
     color: Color = .blue

tests/FlatBuffers.Test.Swift/SwiftTest.sh

@@ -9,6 +9,7 @@ fbc --swift --gen-mutable --grpc --gen-json-emit --gen-object-api -I ${test_dir}
 fbc --swift --gen-json-emit ${test_dir}/optional_scalars.fbs
 fbc --swift --gen-json-emit --gen-object-api ${test_dir}/more_defaults.fbs
 fbc --swift --gen-json-emit --gen-mutable --gen-object-api ${test_dir}/MutatingBool.fbs
+fbc --swift ${test_dir}/vector_has_test.fbs
 cd ${swift_dir}
 
 # Goes into the code generation tests

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/FlatBuffersVectorsTests.swift

@@ -105,6 +105,27 @@ final class FlatBuffersVectors: XCTestCase {
     let number = Numbers.getRootAsNumbers(ByteBuffer(bytes: b.sizedByteArray))
     XCTAssertEqual(number.vArrayDouble, [1, 2, 3, 4, 5])
   }
+
+  func testHasForArray() {
+    var builder = FlatBufferBuilder(initialSize: 20)
+    let emptyVector = [UInt8]()
+    let emptyOffset = builder.createVector(emptyVector)
+    let nonEmptyVector = [1, 2, 3]
+    let nonEmptyVectorOffest = builder.createVector(nonEmptyVector)
+    let start = Swift_Tests_Vectors.startVectors(&builder)
+    Swift_Tests_Vectors.addVectorOf(empty: emptyOffset, &builder)
+    Swift_Tests_Vectors.addVectorOf(array: nonEmptyVectorOffest, &builder)
+    let finish = Swift_Tests_Vectors.endVectors(&builder, start: start)
+    builder.finish(offset: finish)
+
+    let msg = Swift_Tests_Vectors.getRootAsVectors(bb: ByteBuffer(bytes: builder.sizedByteArray))
+    XCTAssertEqual(msg.hasNone, false)
+    XCTAssertEqual(msg.hasEmpty, true)
+    XCTAssertEqual(msg.emptyCount, 0)
+    XCTAssertEqual(msg.hasArray, true)
+    XCTAssertEqual(msg.arrayCount, 3)
+    XCTAssertEqual(msg.array, [1, 2, 3])
+  }
 }
 
 struct Numbers {

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/XCTestManifests.swift

@@ -109,6 +109,7 @@ extension FlatBuffersVectors {
     ("testCreateSharedStringVector", testCreateSharedStringVector),
     ("testCreateVectorOfStrings", testCreateVectorOfStrings),
     ("testCreatingTwoCountries", testCreatingTwoCountries),
+    ("testHasForArray", testHasForArray),
     ("testReadDoubleArray", testReadDoubleArray),
     ("testReadInt32Array", testReadInt32Array),
   ]

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/monster_test_generated.swift

@@ -1196,6 +1196,7 @@ public struct MyGame_Example_Monster: FlatBufferObject, Verifiable, ObjectAPIPac
   @discardableResult public func mutate(hp: Int16) -> Bool {let o = _accessor.offset(VTOFFSET.hp.v);  return _accessor.mutate(hp, index: o) }
   public var name: String! { let o = _accessor.offset(VTOFFSET.name.v); return _accessor.string(at: o) }
   public var nameSegmentArray: [UInt8]! { return _accessor.getVector(at: VTOFFSET.name.v) }
+  public var hasInventory: Bool { let o = _accessor.offset(VTOFFSET.inventory.v); return o == 0 ? false : true }
   public var inventoryCount: Int32 { let o = _accessor.offset(VTOFFSET.inventory.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func inventory(at index: Int32) -> UInt8 { let o = _accessor.offset(VTOFFSET.inventory.v); return o == 0 ? 0 : _accessor.directRead(of: UInt8.self, offset: _accessor.vector(at: o) + index * 1) }
   public var inventory: [UInt8] { return _accessor.getVector(at: VTOFFSET.inventory.v) ?? [] }
@@ -1204,17 +1205,21 @@ public struct MyGame_Example_Monster: FlatBufferObject, Verifiable, ObjectAPIPac
   @discardableResult public func mutate(color: MyGame_Example_Color) -> Bool {let o = _accessor.offset(VTOFFSET.color.v);  return _accessor.mutate(color.rawValue, index: o) }
   public var testType: MyGame_Example_Any_ { let o = _accessor.offset(VTOFFSET.testType.v); return o == 0 ? .none_ : MyGame_Example_Any_(rawValue: _accessor.readBuffer(of: UInt8.self, at: o)) ?? .none_ }
   public func test<T: FlatbuffersInitializable>(type: T.Type) -> T? { let o = _accessor.offset(VTOFFSET.test.v); return o == 0 ? nil : _accessor.union(o) }
+  public var hasTest4: Bool { let o = _accessor.offset(VTOFFSET.test4.v); return o == 0 ? false : true }
   public var test4Count: Int32 { let o = _accessor.offset(VTOFFSET.test4.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func test4(at index: Int32) -> MyGame_Example_Test? { let o = _accessor.offset(VTOFFSET.test4.v); return o == 0 ? nil : _accessor.directRead(of: MyGame_Example_Test.self, offset: _accessor.vector(at: o) + index * 4) }
   public func mutableTest4(at index: Int32) -> MyGame_Example_Test_Mutable? { let o = _accessor.offset(VTOFFSET.test4.v); return o == 0 ? nil : MyGame_Example_Test_Mutable(_accessor.bb, o: _accessor.vector(at: o) + index * 4) }
+  public var hasTestarrayofstring: Bool { let o = _accessor.offset(VTOFFSET.testarrayofstring.v); return o == 0 ? false : true }
   public var testarrayofstringCount: Int32 { let o = _accessor.offset(VTOFFSET.testarrayofstring.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func testarrayofstring(at index: Int32) -> String? { let o = _accessor.offset(VTOFFSET.testarrayofstring.v); return o == 0 ? nil : _accessor.directString(at: _accessor.vector(at: o) + index * 4) }
   ///  an example documentation comment: this will end up in the generated code
   ///  multiline too
+  public var hasTestarrayoftables: Bool { let o = _accessor.offset(VTOFFSET.testarrayoftables.v); return o == 0 ? false : true }
   public var testarrayoftablesCount: Int32 { let o = _accessor.offset(VTOFFSET.testarrayoftables.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func testarrayoftables(at index: Int32) -> MyGame_Example_Monster? { let o = _accessor.offset(VTOFFSET.testarrayoftables.v); return o == 0 ? nil : MyGame_Example_Monster(_accessor.bb, o: _accessor.indirect(_accessor.vector(at: o) + index * 4)) }
   public func testarrayoftablesBy(key: String) -> MyGame_Example_Monster? { let o = _accessor.offset(VTOFFSET.testarrayoftables.v); return o == 0 ? nil : MyGame_Example_Monster.lookupByKey(vector: _accessor.vector(at: o), key: key, fbb: _accessor.bb) }
   public var enemy: MyGame_Example_Monster? { let o = _accessor.offset(VTOFFSET.enemy.v); return o == 0 ? nil : MyGame_Example_Monster(_accessor.bb, o: _accessor.indirect(o + _accessor.postion)) }
+  public var hasTestnestedflatbuffer: Bool { let o = _accessor.offset(VTOFFSET.testnestedflatbuffer.v); return o == 0 ? false : true }
   public var testnestedflatbufferCount: Int32 { let o = _accessor.offset(VTOFFSET.testnestedflatbuffer.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func testnestedflatbuffer(at index: Int32) -> UInt8 { let o = _accessor.offset(VTOFFSET.testnestedflatbuffer.v); return o == 0 ? 0 : _accessor.directRead(of: UInt8.self, offset: _accessor.vector(at: o) + index * 1) }
   public var testnestedflatbuffer: [UInt8] { return _accessor.getVector(at: VTOFFSET.testnestedflatbuffer.v) ?? [] }
@@ -1238,6 +1243,7 @@ public struct MyGame_Example_Monster: FlatBufferObject, Verifiable, ObjectAPIPac
   @discardableResult public func mutate(testhashs64Fnv1a: Int64) -> Bool {let o = _accessor.offset(VTOFFSET.testhashs64Fnv1a.v);  return _accessor.mutate(testhashs64Fnv1a, index: o) }
   public var testhashu64Fnv1a: UInt64 { let o = _accessor.offset(VTOFFSET.testhashu64Fnv1a.v); return o == 0 ? 0 : _accessor.readBuffer(of: UInt64.self, at: o) }
   @discardableResult public func mutate(testhashu64Fnv1a: UInt64) -> Bool {let o = _accessor.offset(VTOFFSET.testhashu64Fnv1a.v);  return _accessor.mutate(testhashu64Fnv1a, index: o) }
+  public var hasTestarrayofbools: Bool { let o = _accessor.offset(VTOFFSET.testarrayofbools.v); return o == 0 ? false : true }
   public var testarrayofboolsCount: Int32 { let o = _accessor.offset(VTOFFSET.testarrayofbools.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func testarrayofbools(at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.testarrayofbools.v); return o == 0 ? true : _accessor.directRead(of: Bool.self, offset: _accessor.vector(at: o) + index * 1) }
   public var testarrayofbools: [Bool] { return _accessor.getVector(at: VTOFFSET.testarrayofbools.v) ?? [] }
@@ -1248,47 +1254,58 @@ public struct MyGame_Example_Monster: FlatBufferObject, Verifiable, ObjectAPIPac
   @discardableResult public func mutate(testf2: Float32) -> Bool {let o = _accessor.offset(VTOFFSET.testf2.v);  return _accessor.mutate(testf2, index: o) }
   public var testf3: Float32 { let o = _accessor.offset(VTOFFSET.testf3.v); return o == 0 ? 0.0 : _accessor.readBuffer(of: Float32.self, at: o) }
   @discardableResult public func mutate(testf3: Float32) -> Bool {let o = _accessor.offset(VTOFFSET.testf3.v);  return _accessor.mutate(testf3, index: o) }
+  public var hasTestarrayofstring2: Bool { let o = _accessor.offset(VTOFFSET.testarrayofstring2.v); return o == 0 ? false : true }
   public var testarrayofstring2Count: Int32 { let o = _accessor.offset(VTOFFSET.testarrayofstring2.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func testarrayofstring2(at index: Int32) -> String? { let o = _accessor.offset(VTOFFSET.testarrayofstring2.v); return o == 0 ? nil : _accessor.directString(at: _accessor.vector(at: o) + index * 4) }
+  public var hasTestarrayofsortedstruct: Bool { let o = _accessor.offset(VTOFFSET.testarrayofsortedstruct.v); return o == 0 ? false : true }
   public var testarrayofsortedstructCount: Int32 { let o = _accessor.offset(VTOFFSET.testarrayofsortedstruct.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func testarrayofsortedstruct(at index: Int32) -> MyGame_Example_Ability? { let o = _accessor.offset(VTOFFSET.testarrayofsortedstruct.v); return o == 0 ? nil : _accessor.directRead(of: MyGame_Example_Ability.self, offset: _accessor.vector(at: o) + index * 8) }
   public func mutableTestarrayofsortedstruct(at index: Int32) -> MyGame_Example_Ability_Mutable? { let o = _accessor.offset(VTOFFSET.testarrayofsortedstruct.v); return o == 0 ? nil : MyGame_Example_Ability_Mutable(_accessor.bb, o: _accessor.vector(at: o) + index * 8) }
+  public var hasFlex: Bool { let o = _accessor.offset(VTOFFSET.flex.v); return o == 0 ? false : true }
   public var flexCount: Int32 { let o = _accessor.offset(VTOFFSET.flex.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func flex(at index: Int32) -> UInt8 { let o = _accessor.offset(VTOFFSET.flex.v); return o == 0 ? 0 : _accessor.directRead(of: UInt8.self, offset: _accessor.vector(at: o) + index * 1) }
   public var flex: [UInt8] { return _accessor.getVector(at: VTOFFSET.flex.v) ?? [] }
   public func mutate(flex: UInt8, at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.flex.v); return _accessor.directMutate(flex, index: _accessor.vector(at: o) + index * 1) }
+  public var hasTest5: Bool { let o = _accessor.offset(VTOFFSET.test5.v); return o == 0 ? false : true }
   public var test5Count: Int32 { let o = _accessor.offset(VTOFFSET.test5.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func test5(at index: Int32) -> MyGame_Example_Test? { let o = _accessor.offset(VTOFFSET.test5.v); return o == 0 ? nil : _accessor.directRead(of: MyGame_Example_Test.self, offset: _accessor.vector(at: o) + index * 4) }
   public func mutableTest5(at index: Int32) -> MyGame_Example_Test_Mutable? { let o = _accessor.offset(VTOFFSET.test5.v); return o == 0 ? nil : MyGame_Example_Test_Mutable(_accessor.bb, o: _accessor.vector(at: o) + index * 4) }
+  public var hasVectorOfLongs: Bool { let o = _accessor.offset(VTOFFSET.vectorOfLongs.v); return o == 0 ? false : true }
   public var vectorOfLongsCount: Int32 { let o = _accessor.offset(VTOFFSET.vectorOfLongs.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vectorOfLongs(at index: Int32) -> Int64 { let o = _accessor.offset(VTOFFSET.vectorOfLongs.v); return o == 0 ? 0 : _accessor.directRead(of: Int64.self, offset: _accessor.vector(at: o) + index * 8) }
   public var vectorOfLongs: [Int64] { return _accessor.getVector(at: VTOFFSET.vectorOfLongs.v) ?? [] }
   public func mutate(vectorOfLongs: Int64, at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.vectorOfLongs.v); return _accessor.directMutate(vectorOfLongs, index: _accessor.vector(at: o) + index * 8) }
+  public var hasVectorOfDoubles: Bool { let o = _accessor.offset(VTOFFSET.vectorOfDoubles.v); return o == 0 ? false : true }
   public var vectorOfDoublesCount: Int32 { let o = _accessor.offset(VTOFFSET.vectorOfDoubles.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vectorOfDoubles(at index: Int32) -> Double { let o = _accessor.offset(VTOFFSET.vectorOfDoubles.v); return o == 0 ? 0 : _accessor.directRead(of: Double.self, offset: _accessor.vector(at: o) + index * 8) }
   public var vectorOfDoubles: [Double] { return _accessor.getVector(at: VTOFFSET.vectorOfDoubles.v) ?? [] }
   public func mutate(vectorOfDoubles: Double, at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.vectorOfDoubles.v); return _accessor.directMutate(vectorOfDoubles, index: _accessor.vector(at: o) + index * 8) }
   public var parentNamespaceTest: MyGame_InParentNamespace? { let o = _accessor.offset(VTOFFSET.parentNamespaceTest.v); return o == 0 ? nil : MyGame_InParentNamespace(_accessor.bb, o: _accessor.indirect(o + _accessor.postion)) }
+  public var hasVectorOfReferrables: Bool { let o = _accessor.offset(VTOFFSET.vectorOfReferrables.v); return o == 0 ? false : true }
   public var vectorOfReferrablesCount: Int32 { let o = _accessor.offset(VTOFFSET.vectorOfReferrables.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vectorOfReferrables(at index: Int32) -> MyGame_Example_Referrable? { let o = _accessor.offset(VTOFFSET.vectorOfReferrables.v); return o == 0 ? nil : MyGame_Example_Referrable(_accessor.bb, o: _accessor.indirect(_accessor.vector(at: o) + index * 4)) }
   public func vectorOfReferrablesBy(key: UInt64) -> MyGame_Example_Referrable? { let o = _accessor.offset(VTOFFSET.vectorOfReferrables.v); return o == 0 ? nil : MyGame_Example_Referrable.lookupByKey(vector: _accessor.vector(at: o), key: key, fbb: _accessor.bb) }
   public var singleWeakReference: UInt64 { let o = _accessor.offset(VTOFFSET.singleWeakReference.v); return o == 0 ? 0 : _accessor.readBuffer(of: UInt64.self, at: o) }
   @discardableResult public func mutate(singleWeakReference: UInt64) -> Bool {let o = _accessor.offset(VTOFFSET.singleWeakReference.v);  return _accessor.mutate(singleWeakReference, index: o) }
+  public var hasVectorOfWeakReferences: Bool { let o = _accessor.offset(VTOFFSET.vectorOfWeakReferences.v); return o == 0 ? false : true }
   public var vectorOfWeakReferencesCount: Int32 { let o = _accessor.offset(VTOFFSET.vectorOfWeakReferences.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vectorOfWeakReferences(at index: Int32) -> UInt64 { let o = _accessor.offset(VTOFFSET.vectorOfWeakReferences.v); return o == 0 ? 0 : _accessor.directRead(of: UInt64.self, offset: _accessor.vector(at: o) + index * 8) }
   public var vectorOfWeakReferences: [UInt64] { return _accessor.getVector(at: VTOFFSET.vectorOfWeakReferences.v) ?? [] }
   public func mutate(vectorOfWeakReferences: UInt64, at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.vectorOfWeakReferences.v); return _accessor.directMutate(vectorOfWeakReferences, index: _accessor.vector(at: o) + index * 8) }
+  public var hasVectorOfStrongReferrables: Bool { let o = _accessor.offset(VTOFFSET.vectorOfStrongReferrables.v); return o == 0 ? false : true }
   public var vectorOfStrongReferrablesCount: Int32 { let o = _accessor.offset(VTOFFSET.vectorOfStrongReferrables.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vectorOfStrongReferrables(at index: Int32) -> MyGame_Example_Referrable? { let o = _accessor.offset(VTOFFSET.vectorOfStrongReferrables.v); return o == 0 ? nil : MyGame_Example_Referrable(_accessor.bb, o: _accessor.indirect(_accessor.vector(at: o) + index * 4)) }
   public func vectorOfStrongReferrablesBy(key: UInt64) -> MyGame_Example_Referrable? { let o = _accessor.offset(VTOFFSET.vectorOfStrongReferrables.v); return o == 0 ? nil : MyGame_Example_Referrable.lookupByKey(vector: _accessor.vector(at: o), key: key, fbb: _accessor.bb) }
   public var coOwningReference: UInt64 { let o = _accessor.offset(VTOFFSET.coOwningReference.v); return o == 0 ? 0 : _accessor.readBuffer(of: UInt64.self, at: o) }
   @discardableResult public func mutate(coOwningReference: UInt64) -> Bool {let o = _accessor.offset(VTOFFSET.coOwningReference.v);  return _accessor.mutate(coOwningReference, index: o) }
+  public var hasVectorOfCoOwningReferences: Bool { let o = _accessor.offset(VTOFFSET.vectorOfCoOwningReferences.v); return o == 0 ? false : true }
   public var vectorOfCoOwningReferencesCount: Int32 { let o = _accessor.offset(VTOFFSET.vectorOfCoOwningReferences.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vectorOfCoOwningReferences(at index: Int32) -> UInt64 { let o = _accessor.offset(VTOFFSET.vectorOfCoOwningReferences.v); return o == 0 ? 0 : _accessor.directRead(of: UInt64.self, offset: _accessor.vector(at: o) + index * 8) }
   public var vectorOfCoOwningReferences: [UInt64] { return _accessor.getVector(at: VTOFFSET.vectorOfCoOwningReferences.v) ?? [] }
   public func mutate(vectorOfCoOwningReferences: UInt64, at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.vectorOfCoOwningReferences.v); return _accessor.directMutate(vectorOfCoOwningReferences, index: _accessor.vector(at: o) + index * 8) }
   public var nonOwningReference: UInt64 { let o = _accessor.offset(VTOFFSET.nonOwningReference.v); return o == 0 ? 0 : _accessor.readBuffer(of: UInt64.self, at: o) }
   @discardableResult public func mutate(nonOwningReference: UInt64) -> Bool {let o = _accessor.offset(VTOFFSET.nonOwningReference.v);  return _accessor.mutate(nonOwningReference, index: o) }
+  public var hasVectorOfNonOwningReferences: Bool { let o = _accessor.offset(VTOFFSET.vectorOfNonOwningReferences.v); return o == 0 ? false : true }
   public var vectorOfNonOwningReferencesCount: Int32 { let o = _accessor.offset(VTOFFSET.vectorOfNonOwningReferences.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vectorOfNonOwningReferences(at index: Int32) -> UInt64 { let o = _accessor.offset(VTOFFSET.vectorOfNonOwningReferences.v); return o == 0 ? 0 : _accessor.directRead(of: UInt64.self, offset: _accessor.vector(at: o) + index * 8) }
   public var vectorOfNonOwningReferences: [UInt64] { return _accessor.getVector(at: VTOFFSET.vectorOfNonOwningReferences.v) ?? [] }
@@ -1297,14 +1314,17 @@ public struct MyGame_Example_Monster: FlatBufferObject, Verifiable, ObjectAPIPac
   public func anyUnique<T: FlatbuffersInitializable>(type: T.Type) -> T? { let o = _accessor.offset(VTOFFSET.anyUnique.v); return o == 0 ? nil : _accessor.union(o) }
   public var anyAmbiguousType: MyGame_Example_AnyAmbiguousAliases { let o = _accessor.offset(VTOFFSET.anyAmbiguousType.v); return o == 0 ? .none_ : MyGame_Example_AnyAmbiguousAliases(rawValue: _accessor.readBuffer(of: UInt8.self, at: o)) ?? .none_ }
   public func anyAmbiguous<T: FlatbuffersInitializable>(type: T.Type) -> T? { let o = _accessor.offset(VTOFFSET.anyAmbiguous.v); return o == 0 ? nil : _accessor.union(o) }
+  public var hasVectorOfEnums: Bool { let o = _accessor.offset(VTOFFSET.vectorOfEnums.v); return o == 0 ? false : true }
   public var vectorOfEnumsCount: Int32 { let o = _accessor.offset(VTOFFSET.vectorOfEnums.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vectorOfEnums(at index: Int32) -> MyGame_Example_Color? { let o = _accessor.offset(VTOFFSET.vectorOfEnums.v); return o == 0 ? MyGame_Example_Color.red : MyGame_Example_Color(rawValue: _accessor.directRead(of: UInt8.self, offset: _accessor.vector(at: o) + index * 1)) }
   public var signedEnum: MyGame_Example_Race { let o = _accessor.offset(VTOFFSET.signedEnum.v); return o == 0 ? .none_ : MyGame_Example_Race(rawValue: _accessor.readBuffer(of: Int8.self, at: o)) ?? .none_ }
   @discardableResult public func mutate(signedEnum: MyGame_Example_Race) -> Bool {let o = _accessor.offset(VTOFFSET.signedEnum.v);  return _accessor.mutate(signedEnum.rawValue, index: o) }
+  public var hasTestrequirednestedflatbuffer: Bool { let o = _accessor.offset(VTOFFSET.testrequirednestedflatbuffer.v); return o == 0 ? false : true }
   public var testrequirednestedflatbufferCount: Int32 { let o = _accessor.offset(VTOFFSET.testrequirednestedflatbuffer.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func testrequirednestedflatbuffer(at index: Int32) -> UInt8 { let o = _accessor.offset(VTOFFSET.testrequirednestedflatbuffer.v); return o == 0 ? 0 : _accessor.directRead(of: UInt8.self, offset: _accessor.vector(at: o) + index * 1) }
   public var testrequirednestedflatbuffer: [UInt8] { return _accessor.getVector(at: VTOFFSET.testrequirednestedflatbuffer.v) ?? [] }
   public func mutate(testrequirednestedflatbuffer: UInt8, at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.testrequirednestedflatbuffer.v); return _accessor.directMutate(testrequirednestedflatbuffer, index: _accessor.vector(at: o) + index * 1) }
+  public var hasScalarKeySortedTables: Bool { let o = _accessor.offset(VTOFFSET.scalarKeySortedTables.v); return o == 0 ? false : true }
   public var scalarKeySortedTablesCount: Int32 { let o = _accessor.offset(VTOFFSET.scalarKeySortedTables.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func scalarKeySortedTables(at index: Int32) -> MyGame_Example_Stat? { let o = _accessor.offset(VTOFFSET.scalarKeySortedTables.v); return o == 0 ? nil : MyGame_Example_Stat(_accessor.bb, o: _accessor.indirect(_accessor.vector(at: o) + index * 4)) }
   public func scalarKeySortedTablesBy(key: UInt16) -> MyGame_Example_Stat? { let o = _accessor.offset(VTOFFSET.scalarKeySortedTables.v); return o == 0 ? nil : MyGame_Example_Stat.lookupByKey(vector: _accessor.vector(at: o), key: key, fbb: _accessor.bb) }
@@ -2325,10 +2345,12 @@ public struct MyGame_Example_TypeAliases: FlatBufferObject, Verifiable, ObjectAP
   @discardableResult public func mutate(f32: Float32) -> Bool {let o = _accessor.offset(VTOFFSET.f32.v);  return _accessor.mutate(f32, index: o) }
   public var f64: Double { let o = _accessor.offset(VTOFFSET.f64.v); return o == 0 ? 0.0 : _accessor.readBuffer(of: Double.self, at: o) }
   @discardableResult public func mutate(f64: Double) -> Bool {let o = _accessor.offset(VTOFFSET.f64.v);  return _accessor.mutate(f64, index: o) }
+  public var hasV8: Bool { let o = _accessor.offset(VTOFFSET.v8.v); return o == 0 ? false : true }
   public var v8Count: Int32 { let o = _accessor.offset(VTOFFSET.v8.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func v8(at index: Int32) -> Int8 { let o = _accessor.offset(VTOFFSET.v8.v); return o == 0 ? 0 : _accessor.directRead(of: Int8.self, offset: _accessor.vector(at: o) + index * 1) }
   public var v8: [Int8] { return _accessor.getVector(at: VTOFFSET.v8.v) ?? [] }
   public func mutate(v8: Int8, at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.v8.v); return _accessor.directMutate(v8, index: _accessor.vector(at: o) + index * 1) }
+  public var hasVf64: Bool { let o = _accessor.offset(VTOFFSET.vf64.v); return o == 0 ? false : true }
   public var vf64Count: Int32 { let o = _accessor.offset(VTOFFSET.vf64.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func vf64(at index: Int32) -> Double { let o = _accessor.offset(VTOFFSET.vf64.v); return o == 0 ? 0 : _accessor.directRead(of: Double.self, offset: _accessor.vector(at: o) + index * 8) }
   public var vf64: [Double] { return _accessor.getVector(at: VTOFFSET.vf64.v) ?? [] }

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/more_defaults_generated.swift

@@ -49,9 +49,11 @@ public struct MoreDefaults: FlatBufferObject, Verifiable, ObjectAPIPacker {
     var p: VOffset { self.rawValue }
   }
 
+  public var hasInts: Bool { let o = _accessor.offset(VTOFFSET.ints.v); return o == 0 ? false : true }
   public var intsCount: Int32 { let o = _accessor.offset(VTOFFSET.ints.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func ints(at index: Int32) -> Int32 { let o = _accessor.offset(VTOFFSET.ints.v); return o == 0 ? 0 : _accessor.directRead(of: Int32.self, offset: _accessor.vector(at: o) + index * 4) }
   public var ints: [Int32] { return _accessor.getVector(at: VTOFFSET.ints.v) ?? [] }
+  public var hasFloats: Bool { let o = _accessor.offset(VTOFFSET.floats.v); return o == 0 ? false : true }
   public var floatsCount: Int32 { let o = _accessor.offset(VTOFFSET.floats.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func floats(at index: Int32) -> Float32 { let o = _accessor.offset(VTOFFSET.floats.v); return o == 0 ? 0 : _accessor.directRead(of: Float32.self, offset: _accessor.vector(at: o) + index * 4) }
   public var floats: [Float32] { return _accessor.getVector(at: VTOFFSET.floats.v) ?? [] }
@@ -59,8 +61,10 @@ public struct MoreDefaults: FlatBufferObject, Verifiable, ObjectAPIPacker {
   public var emptyStringSegmentArray: [UInt8]? { return _accessor.getVector(at: VTOFFSET.emptyString.v) }
   public var someString: String? { let o = _accessor.offset(VTOFFSET.someString.v); return o == 0 ? "some" : _accessor.string(at: o) }
   public var someStringSegmentArray: [UInt8]? { return _accessor.getVector(at: VTOFFSET.someString.v) }
+  public var hasAbcs: Bool { let o = _accessor.offset(VTOFFSET.abcs.v); return o == 0 ? false : true }
   public var abcsCount: Int32 { let o = _accessor.offset(VTOFFSET.abcs.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func abcs(at index: Int32) -> ABC? { let o = _accessor.offset(VTOFFSET.abcs.v); return o == 0 ? ABC.a : ABC(rawValue: _accessor.directRead(of: Int32.self, offset: _accessor.vector(at: o) + index * 4)) }
+  public var hasBools: Bool { let o = _accessor.offset(VTOFFSET.bools.v); return o == 0 ? false : true }
   public var boolsCount: Int32 { let o = _accessor.offset(VTOFFSET.bools.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func bools(at index: Int32) -> Bool { let o = _accessor.offset(VTOFFSET.bools.v); return o == 0 ? true : _accessor.directRead(of: Bool.self, offset: _accessor.vector(at: o) + index * 1) }
   public var bools: [Bool] { return _accessor.getVector(at: VTOFFSET.bools.v) ?? [] }

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/union_vector_generated.swift

@@ -512,8 +512,10 @@ public struct Movie: FlatBufferObject, Verifiable, ObjectAPIPacker {
 
   public var mainCharacterType: Character { let o = _accessor.offset(VTOFFSET.mainCharacterType.v); return o == 0 ? .none_ : Character(rawValue: _accessor.readBuffer(of: UInt8.self, at: o)) ?? .none_ }
   public func mainCharacter<T: FlatbuffersInitializable>(type: T.Type) -> T? { let o = _accessor.offset(VTOFFSET.mainCharacter.v); return o == 0 ? nil : _accessor.union(o) }
+  public var hasCharactersType: Bool { let o = _accessor.offset(VTOFFSET.charactersType.v); return o == 0 ? false : true }
   public var charactersTypeCount: Int32 { let o = _accessor.offset(VTOFFSET.charactersType.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func charactersType(at index: Int32) -> Character? { let o = _accessor.offset(VTOFFSET.charactersType.v); return o == 0 ? Character.none_ : Character(rawValue: _accessor.directRead(of: UInt8.self, offset: _accessor.vector(at: o) + index * 1)) }
+  public var hasCharacters: Bool { let o = _accessor.offset(VTOFFSET.characters.v); return o == 0 ? false : true }
   public var charactersCount: Int32 { let o = _accessor.offset(VTOFFSET.characters.v); return o == 0 ? 0 : _accessor.vector(count: o) }
   public func characters<T: FlatbuffersInitializable>(at index: Int32, type: T.Type) -> T? { let o = _accessor.offset(VTOFFSET.characters.v); return o == 0 ? nil : _accessor.directUnion(_accessor.vector(at: o) + index * 4) }
   public static func startMovie(_ fbb: inout FlatBufferBuilder) -> UOffset { fbb.startTable(with: 4) }

tests/FlatBuffers.Test.Swift/Tests/FlatBuffers.Test.SwiftTests/vector_has_test_generated.swift

@@ -0,0 +1,85 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+// swiftlint:disable all
+// swiftformat:disable all
+
+import FlatBuffers
+
+public struct Swift_Tests_Vectors: FlatBufferObject, Verifiable {
+
+  static func validateVersion() { FlatBuffersVersion_2_0_0() }
+  public var __buffer: ByteBuffer! { return _accessor.bb }
+  private var _accessor: Table
+
+  public static func getRootAsVectors(bb: ByteBuffer) -> Swift_Tests_Vectors { return Swift_Tests_Vectors(Table(bb: bb, position: Int32(bb.read(def: UOffset.self, position: bb.reader)) + Int32(bb.reader))) }
+
+  private init(_ t: Table) { _accessor = t }
+  public init(_ bb: ByteBuffer, o: Int32) { _accessor = Table(bb: bb, position: o) }
+
+  private enum VTOFFSET: VOffset {
+    case none_ = 4
+    case empty = 6
+    case array = 8
+    var v: Int32 { Int32(self.rawValue) }
+    var p: VOffset { self.rawValue }
+  }
+
+  public var hasNone: Bool { let o = _accessor.offset(VTOFFSET.none_.v); return o == 0 ? false : true }
+  public var none_Count: Int32 { let o = _accessor.offset(VTOFFSET.none_.v); return o == 0 ? 0 : _accessor.vector(count: o) }
+  public func none_(at index: Int32) -> UInt64 { let o = _accessor.offset(VTOFFSET.none_.v); return o == 0 ? 0 : _accessor.directRead(of: UInt64.self, offset: _accessor.vector(at: o) + index * 8) }
+  public var none_: [UInt64] { return _accessor.getVector(at: VTOFFSET.none_.v) ?? [] }
+  public var hasEmpty: Bool { let o = _accessor.offset(VTOFFSET.empty.v); return o == 0 ? false : true }
+  public var emptyCount: Int32 { let o = _accessor.offset(VTOFFSET.empty.v); return o == 0 ? 0 : _accessor.vector(count: o) }
+  public func empty(at index: Int32) -> UInt64 { let o = _accessor.offset(VTOFFSET.empty.v); return o == 0 ? 0 : _accessor.directRead(of: UInt64.self, offset: _accessor.vector(at: o) + index * 8) }
+  public var empty: [UInt64] { return _accessor.getVector(at: VTOFFSET.empty.v) ?? [] }
+  public var hasArray: Bool { let o = _accessor.offset(VTOFFSET.array.v); return o == 0 ? false : true }
+  public var arrayCount: Int32 { let o = _accessor.offset(VTOFFSET.array.v); return o == 0 ? 0 : _accessor.vector(count: o) }
+  public func array(at index: Int32) -> UInt64 { let o = _accessor.offset(VTOFFSET.array.v); return o == 0 ? 0 : _accessor.directRead(of: UInt64.self, offset: _accessor.vector(at: o) + index * 8) }
+  public var array: [UInt64] { return _accessor.getVector(at: VTOFFSET.array.v) ?? [] }
+  public static func startVectors(_ fbb: inout FlatBufferBuilder) -> UOffset { fbb.startTable(with: 3) }
+  public static func addVectorOf(none_: Offset, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: none_, at: VTOFFSET.none_.p) }
+  public static func addVectorOf(empty: Offset, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: empty, at: VTOFFSET.empty.p) }
+  public static func addVectorOf(array: Offset, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: array, at: VTOFFSET.array.p) }
+  public static func endVectors(_ fbb: inout FlatBufferBuilder, start: UOffset) -> Offset { let end = Offset(offset: fbb.endTable(at: start)); return end }
+  public static func createVectors(
+    _ fbb: inout FlatBufferBuilder,
+    none_VectorOffset none_: Offset = Offset(),
+    emptyVectorOffset empty: Offset = Offset(),
+    arrayVectorOffset array: Offset = Offset()
+  ) -> Offset {
+    let __start = Swift_Tests_Vectors.startVectors(&fbb)
+    Swift_Tests_Vectors.addVectorOf(none_: none_, &fbb)
+    Swift_Tests_Vectors.addVectorOf(empty: empty, &fbb)
+    Swift_Tests_Vectors.addVectorOf(array: array, &fbb)
+    return Swift_Tests_Vectors.endVectors(&fbb, start: __start)
+  }
+
+  public static func verify<T>(_ verifier: inout Verifier, at position: Int, of type: T.Type) throws where T: Verifiable {
+    var _v = try verifier.visitTable(at: position)
+    try _v.visit(field: VTOFFSET.none_.p, fieldName: "none_", required: false, type: ForwardOffset<Vector<UInt64, UInt64>>.self)
+    try _v.visit(field: VTOFFSET.empty.p, fieldName: "empty", required: false, type: ForwardOffset<Vector<UInt64, UInt64>>.self)
+    try _v.visit(field: VTOFFSET.array.p, fieldName: "array", required: false, type: ForwardOffset<Vector<UInt64, UInt64>>.self)
+    _v.finish()
+  }
+}
+
+extension Swift_Tests_Vectors: Encodable {
+
+  enum CodingKeys: String, CodingKey {
+    case none_ = "none"
+    case empty = "empty"
+    case array = "array"
+  }
+  public func encode(to encoder: Encoder) throws {
+    var container = encoder.container(keyedBy: CodingKeys.self)
+    if none_Count > 0 {
+      try container.encodeIfPresent(none_, forKey: .none_)
+    }
+    if emptyCount > 0 {
+      try container.encodeIfPresent(empty, forKey: .empty)
+    }
+    if arrayCount > 0 {
+      try container.encodeIfPresent(array, forKey: .array)
+    }
+  }
+}
+

tests/vector_has_test.fbs

@@ -0,0 +1,10 @@
+namespace Swift.Tests;
+
+table Vectors
+{
+  none:[ulong];
+  empty:[ulong];
+  array:[ulong];
+}
+
+root_type Vectors;