Default-empty vectors of enums (#6505)

* disable clippy

* Vector of enum default

* swift and tests

* git clang format

* Rewrite enum parser checks

* Remove Voids from more_defaults

* vector enum swift

* remove vector accessor from swift

* clang format

Co-authored-by: Casper Neo <cneo@google.com>

src/idl_gen_swift.cpp

@@ -848,7 +848,7 @@ class SwiftGenerator : public BaseGenerator {
     code_.SetValue("ENUM_NAME", NameWrappedInNameSpace(enum_def));
     code_.SetValue("BASE_TYPE", GenTypeBasic(enum_def.underlying_type, false));
     GenComment(enum_def.doc_comment);
-    code_ += "{{ACCESS_TYPE}} enum {{ENUM_NAME}}: {{BASE_TYPE}}, Enum { ";
+    code_ += "{{ACCESS_TYPE}} enum {{ENUM_NAME}}: {{BASE_TYPE}}, Enum {";
     Indent();
     code_ += "{{ACCESS_TYPE}} typealias T = {{BASE_TYPE}}";
     code_ +=
@@ -1472,7 +1472,9 @@ class SwiftGenerator : public BaseGenerator {
     auto &value = field.value;
     FLATBUFFERS_ASSERT(value.type.enum_def);
     auto &enum_def = *value.type.enum_def;
-    auto enum_val = enum_def.FindByValue(value.constant);
+    // Vector of enum defaults are always "[]" which never works.
+    const std::string constant = IsVector(value.type) ? "0" : value.constant;
+    auto enum_val = enum_def.FindByValue(constant);
     std::string name;
     if (enum_val) {
       name = Name(*enum_val);

src/idl_parser.cpp

@@ -910,24 +910,32 @@ CheckedError Parser::ParseField(StructDef &struct_def) {
   }
 
   if (type.enum_def) {
-    // The type.base_type can only be scalar, union, array or vector.
+    // Verify the enum's type and default value.
-    // Table, struct or string can't have enum_def.
+    const std::string &constant = field->value.constant;
-    // Default value of union and vector in NONE, NULL translated to "0".
+    if (type.base_type == BASE_TYPE_UNION) {
-    FLATBUFFERS_ASSERT(IsInteger(type.base_type) ||
+      if (constant != "0") { return Error("Union defaults must be NONE"); }
-                       (type.base_type == BASE_TYPE_UNION) || IsVector(type) ||
+    } else if (IsVector(type)) {
-                       IsArray(type));
+      if (constant != "0" && constant != "[]") {
-    if (IsVector(type)) {
+        return Error("Vector defaults may only be `[]`.");
-      // Vector can't use initialization list.
+      }
-      FLATBUFFERS_ASSERT(field->value.constant == "0");
+    } else if (IsArray(type)) {
+      if (constant != "0") {
+        return Error("Array defaults are not supported yet.");
+      }
     } else {
-      // All unions should have the NONE ("0") enum value.
+      if (!IsInteger(type.base_type)) {
-      auto in_enum = field->IsOptional() ||
+        return Error("Enums must have integer base types");
-                     type.enum_def->attributes.Lookup("bit_flags") ||
+      }
-                     type.enum_def->FindByValue(field->value.constant);
+      // Optional and bitflags enums may have default constants that are not
-      if (false == in_enum)
+      // their specified variants.
-        return Error("default value of " + field->value.constant +
+      if (!field->IsOptional() &&
-                     " for field " + name + " is not part of enum " +
+          type.enum_def->attributes.Lookup("bit_flags") == nullptr) {
-                     type.enum_def->name);
+        if (type.enum_def->FindByValue(constant) == nullptr) {
+          return Error("default value of `" + constant + "` for " + "field `" +
+                       name + "` is not part of enum `" + type.enum_def->name +
+                       "`.");
+        }
+      }
     }
   }
 

tests/FlatBuffers.Test.Swift/SwiftTest.sh

@@ -2,6 +2,7 @@ swift_dir=`pwd`
 cd ..
 test_dir=`pwd`
 alias fbc='${test_dir}/../flatc'
+shopt -s expand_aliases
 
 cd ${swift_dir}/Tests/FlatBuffers.Test.SwiftTests
 fbc --swift --gen-mutable --grpc --gen-object-api -I ${test_dir}/include_test ${test_dir}/monster_test.fbs ${test_dir}/union_vector/union_vector.fbs

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

@@ -29,8 +29,11 @@ class FlatBuffersMoreDefaults: XCTestCase {
     XCTAssertEqual(defaults.someString, "some")
     XCTAssertEqual(defaults.ints, [])
     XCTAssertEqual(defaults.floats, [])
+    XCTAssertEqual(defaults.bools, [])
     XCTAssertEqual(defaults.intsCount, 0)
     XCTAssertEqual(defaults.floatsCount, 0)
+    XCTAssertEqual(defaults.abcsCount, 0)
+    XCTAssertEqual(defaults.boolsCount, 0)
   }
 
   func testFlatbuffersObjectAPI() {
@@ -40,6 +43,8 @@ class FlatBuffersMoreDefaults: XCTestCase {
     XCTAssertEqual(defaults.someString, "some")
     XCTAssertEqual(defaults.ints, [])
     XCTAssertEqual(defaults.floats, [])
+    XCTAssertEqual(defaults.abcs, [])
+    XCTAssertEqual(defaults.bools, [])
 
     let buffer = defaults.serialize(builder: &fbb, type: MoreDefaults.self)
     let fDefaults = MoreDefaults.getRootAsMoreDefaults(bb: buffer)
@@ -49,5 +54,7 @@ class FlatBuffersMoreDefaults: XCTestCase {
     XCTAssertEqual(fDefaults.floats, [])
     XCTAssertEqual(fDefaults.intsCount, 0)
     XCTAssertEqual(fDefaults.floatsCount, 0)
+    XCTAssertEqual(fDefaults.abcsCount, 0)
+    XCTAssertEqual(fDefaults.boolsCount, 0)
   }
 }

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

@@ -4,6 +4,19 @@
 
 import FlatBuffers
 
+public enum ABC: Int32, Enum {
+  public typealias T = Int32
+  public static var byteSize: Int { return MemoryLayout<Int32>.size }
+  public var value: Int32 { return self.rawValue }
+  case a = 0
+  case b = 1
+  case c = 2
+  
+
+  public static var max: ABC { return .c }
+  public static var min: ABC { return .a }
+}
+
 public struct MoreDefaults: FlatBufferObject, ObjectAPIPacker {
 
   static func validateVersion() { FlatBuffersVersion_1_12_0() }
@@ -20,6 +33,8 @@ public struct MoreDefaults: FlatBufferObject, ObjectAPIPacker {
     case floats = 6
     case emptyString = 8
     case someString = 10
+    case abcs = 12
+    case bools = 14
     var v: Int32 { Int32(self.rawValue) }
     var p: VOffset { self.rawValue }
   }
@@ -34,24 +49,35 @@ public struct MoreDefaults: FlatBufferObject, 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 static func startMoreDefaults(_ fbb: inout FlatBufferBuilder) -> UOffset { fbb.startTable(with: 4) }
+  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 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) ?? [] }
+  public static func startMoreDefaults(_ fbb: inout FlatBufferBuilder) -> UOffset { fbb.startTable(with: 6) }
   public static func addVectorOf(ints: Offset<UOffset>, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: ints, at: VTOFFSET.ints.p) }
   public static func addVectorOf(floats: Offset<UOffset>, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: floats, at: VTOFFSET.floats.p) }
   public static func add(emptyString: Offset<String>, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: emptyString, at: VTOFFSET.emptyString.p) }
   public static func add(someString: Offset<String>, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: someString, at: VTOFFSET.someString.p) }
+  public static func addVectorOf(abcs: Offset<UOffset>, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: abcs, at: VTOFFSET.abcs.p) }
+  public static func addVectorOf(bools: Offset<UOffset>, _ fbb: inout FlatBufferBuilder) { fbb.add(offset: bools, at: VTOFFSET.bools.p) }
   public static func endMoreDefaults(_ fbb: inout FlatBufferBuilder, start: UOffset) -> Offset<UOffset> { let end = Offset<UOffset>(offset: fbb.endTable(at: start)); return end }
   public static func createMoreDefaults(
     _ fbb: inout FlatBufferBuilder,
     intsVectorOffset ints: Offset<UOffset> = Offset(),
     floatsVectorOffset floats: Offset<UOffset> = Offset(),
     emptyStringOffset emptyString: Offset<String> = Offset(),
-    someStringOffset someString: Offset<String> = Offset()
+    someStringOffset someString: Offset<String> = Offset(),
+    abcsVectorOffset abcs: Offset<UOffset> = Offset(),
+    boolsVectorOffset bools: Offset<UOffset> = Offset()
   ) -> Offset<UOffset> {
     let __start = MoreDefaults.startMoreDefaults(&fbb)
     MoreDefaults.addVectorOf(ints: ints, &fbb)
     MoreDefaults.addVectorOf(floats: floats, &fbb)
     MoreDefaults.add(emptyString: emptyString, &fbb)
     MoreDefaults.add(someString: someString, &fbb)
+    MoreDefaults.addVectorOf(abcs: abcs, &fbb)
+    MoreDefaults.addVectorOf(bools: bools, &fbb)
     return MoreDefaults.endMoreDefaults(&fbb, start: __start)
   }
   
@@ -81,11 +107,15 @@ public struct MoreDefaults: FlatBufferObject, ObjectAPIPacker {
       __someString = Offset<String>()
     }
 
+    let __abcs = builder.createVector(obj.abcs)
+    let __bools = builder.createVector(obj.bools)
     let __root = MoreDefaults.startMoreDefaults(&builder)
     MoreDefaults.addVectorOf(ints: __ints, &builder)
     MoreDefaults.addVectorOf(floats: __floats, &builder)
     MoreDefaults.add(emptyString: __emptyString, &builder)
     MoreDefaults.add(someString: __someString, &builder)
+    MoreDefaults.addVectorOf(abcs: __abcs, &builder)
+    MoreDefaults.addVectorOf(bools: __bools, &builder)
     return MoreDefaults.endMoreDefaults(&builder, start: __root)
   }
 }
@@ -96,6 +126,8 @@ public class MoreDefaultsT: NativeObject {
   public var floats: [Float32]
   public var emptyString: String?
   public var someString: String?
+  public var abcs: [ABC]
+  public var bools: [Bool]
 
   public init(_ _t: inout MoreDefaults) {
     ints = []
@@ -108,6 +140,14 @@ public class MoreDefaultsT: NativeObject {
     }
     emptyString = _t.emptyString
     someString = _t.someString
+    abcs = []
+    for index in 0..<_t.abcsCount {
+        abcs.append(_t.abcs(at: index)!)
+    }
+    bools = []
+    for index in 0..<_t.boolsCount {
+        bools.append(_t.bools(at: index))
+    }
   }
 
   public init() {
@@ -115,6 +155,8 @@ public class MoreDefaultsT: NativeObject {
     floats = []
     emptyString = ""
     someString = "some"
+    abcs = []
+    bools = []
   }
 
   public func serialize() -> ByteBuffer { return serialize(type: MoreDefaults.self) }

tests/more_defaults.fbs

@@ -1,7 +1,12 @@
 
+enum ABC: int { A, B, C }
+
+
 table MoreDefaults {
   ints: [int] = [];
   floats: [float] = [     ];
   empty_string: string = "";
   some_string: string = "some";
+  abcs: [ABC] = [];
+  bools: [bool] = [];
 }

tests/more_defaults_generated.rs

@@ -8,6 +8,94 @@ use std::cmp::Ordering;
 extern crate flatbuffers;
 use self::flatbuffers::EndianScalar;
 
+#[deprecated(since = "2.0.0", note = "Use associated constants instead. This will no longer be generated in 2021.")]
+pub const ENUM_MIN_ABC: i32 = 0;
+#[deprecated(since = "2.0.0", note = "Use associated constants instead. This will no longer be generated in 2021.")]
+pub const ENUM_MAX_ABC: i32 = 2;
+#[deprecated(since = "2.0.0", note = "Use associated constants instead. This will no longer be generated in 2021.")]
+#[allow(non_camel_case_types)]
+pub const ENUM_VALUES_ABC: [ABC; 3] = [
+  ABC::A,
+  ABC::B,
+  ABC::C,
+];
+
+#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash, Default)]
+#[repr(transparent)]
+pub struct ABC(pub i32);
+#[allow(non_upper_case_globals)]
+impl ABC {
+  pub const A: Self = Self(0);
+  pub const B: Self = Self(1);
+  pub const C: Self = Self(2);
+
+  pub const ENUM_MIN: i32 = 0;
+  pub const ENUM_MAX: i32 = 2;
+  pub const ENUM_VALUES: &'static [Self] = &[
+    Self::A,
+    Self::B,
+    Self::C,
+  ];
+  /// Returns the variant's name or "" if unknown.
+  pub fn variant_name(self) -> Option<&'static str> {
+    match self {
+      Self::A => Some("A"),
+      Self::B => Some("B"),
+      Self::C => Some("C"),
+      _ => None,
+    }
+  }
+}
+impl std::fmt::Debug for ABC {
+  fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+    if let Some(name) = self.variant_name() {
+      f.write_str(name)
+    } else {
+      f.write_fmt(format_args!("<UNKNOWN {:?}>", self.0))
+    }
+  }
+}
+impl<'a> flatbuffers::Follow<'a> for ABC {
+  type Inner = Self;
+  #[inline]
+  fn follow(buf: &'a [u8], loc: usize) -> Self::Inner {
+    let b = flatbuffers::read_scalar_at::<i32>(buf, loc);
+    Self(b)
+  }
+}
+
+impl flatbuffers::Push for ABC {
+    type Output = ABC;
+    #[inline]
+    fn push(&self, dst: &mut [u8], _rest: &[u8]) {
+        flatbuffers::emplace_scalar::<i32>(dst, self.0);
+    }
+}
+
+impl flatbuffers::EndianScalar for ABC {
+  #[inline]
+  fn to_little_endian(self) -> Self {
+    let b = i32::to_le(self.0);
+    Self(b)
+  }
+  #[inline]
+  fn from_little_endian(self) -> Self {
+    let b = i32::from_le(self.0);
+    Self(b)
+  }
+}
+
+impl<'a> flatbuffers::Verifiable for ABC {
+  #[inline]
+  fn run_verifier(
+    v: &mut flatbuffers::Verifier, pos: usize
+  ) -> Result<(), flatbuffers::InvalidFlatbuffer> {
+    use self::flatbuffers::Verifiable;
+    i32::run_verifier(v, pos)
+  }
+}
+
+impl flatbuffers::SimpleToVerifyInSlice for ABC {}
 pub enum MoreDefaultsOffset {}
 #[derive(Copy, Clone, PartialEq)]
 
@@ -33,6 +121,8 @@ impl<'a> MoreDefaults<'a> {
         _fbb: &'mut_bldr mut flatbuffers::FlatBufferBuilder<'bldr>,
         args: &'args MoreDefaultsArgs<'args>) -> flatbuffers::WIPOffset<MoreDefaults<'bldr>> {
       let mut builder = MoreDefaultsBuilder::new(_fbb);
+      if let Some(x) = args.bools { builder.add_bools(x); }
+      if let Some(x) = args.abcs { builder.add_abcs(x); }
       if let Some(x) = args.some_string { builder.add_some_string(x); }
       if let Some(x) = args.empty_string { builder.add_empty_string(x); }
       if let Some(x) = args.floats { builder.add_floats(x); }
@@ -57,17 +147,29 @@ impl<'a> MoreDefaults<'a> {
         let x = self.some_string();
         x.to_string()
       };
+      let abcs = {
+        let x = self.abcs();
+        x.into_iter().collect()
+      };
+      let bools = {
+        let x = self.bools();
+        x.to_vec()
+      };
       MoreDefaultsT {
         ints,
         floats,
         empty_string,
         some_string,
+        abcs,
+        bools,
       }
     }
     pub const VT_INTS: flatbuffers::VOffsetT = 4;
     pub const VT_FLOATS: flatbuffers::VOffsetT = 6;
     pub const VT_EMPTY_STRING: flatbuffers::VOffsetT = 8;
     pub const VT_SOME_STRING: flatbuffers::VOffsetT = 10;
+    pub const VT_ABCS: flatbuffers::VOffsetT = 12;
+    pub const VT_BOOLS: flatbuffers::VOffsetT = 14;
 
   #[inline]
   pub fn ints(&self) -> flatbuffers::Vector<'a, i32> {
@@ -85,6 +187,14 @@ impl<'a> MoreDefaults<'a> {
   pub fn some_string(&self) -> &'a str {
     self._tab.get::<flatbuffers::ForwardsUOffset<&str>>(MoreDefaults::VT_SOME_STRING, Some(&"some")).unwrap()
   }
+  #[inline]
+  pub fn abcs(&self) -> flatbuffers::Vector<'a, ABC> {
+    self._tab.get::<flatbuffers::ForwardsUOffset<flatbuffers::Vector<'a, ABC>>>(MoreDefaults::VT_ABCS, Some(Default::default())).unwrap()
+  }
+  #[inline]
+  pub fn bools(&self) -> &'a [bool] {
+    self._tab.get::<flatbuffers::ForwardsUOffset<flatbuffers::Vector<'a, bool>>>(MoreDefaults::VT_BOOLS, Some(Default::default())).map(|v| v.safe_slice()).unwrap()
+  }
 }
 
 impl flatbuffers::Verifiable for MoreDefaults<'_> {
@@ -98,6 +208,8 @@ impl flatbuffers::Verifiable for MoreDefaults<'_> {
      .visit_field::<flatbuffers::ForwardsUOffset<flatbuffers::Vector<'_, f32>>>(&"floats", Self::VT_FLOATS, false)?
      .visit_field::<flatbuffers::ForwardsUOffset<&str>>(&"empty_string", Self::VT_EMPTY_STRING, false)?
      .visit_field::<flatbuffers::ForwardsUOffset<&str>>(&"some_string", Self::VT_SOME_STRING, false)?
+     .visit_field::<flatbuffers::ForwardsUOffset<flatbuffers::Vector<'_, ABC>>>(&"abcs", Self::VT_ABCS, false)?
+     .visit_field::<flatbuffers::ForwardsUOffset<flatbuffers::Vector<'_, bool>>>(&"bools", Self::VT_BOOLS, false)?
      .finish();
     Ok(())
   }
@@ -107,6 +219,8 @@ pub struct MoreDefaultsArgs<'a> {
     pub floats: Option<flatbuffers::WIPOffset<flatbuffers::Vector<'a, f32>>>,
     pub empty_string: Option<flatbuffers::WIPOffset<&'a str>>,
     pub some_string: Option<flatbuffers::WIPOffset<&'a str>>,
+    pub abcs: Option<flatbuffers::WIPOffset<flatbuffers::Vector<'a, ABC>>>,
+    pub bools: Option<flatbuffers::WIPOffset<flatbuffers::Vector<'a, bool>>>,
 }
 impl<'a> Default for MoreDefaultsArgs<'a> {
     #[inline]
@@ -116,6 +230,8 @@ impl<'a> Default for MoreDefaultsArgs<'a> {
             floats: None,
             empty_string: None,
             some_string: None,
+            abcs: None,
+            bools: None,
         }
     }
 }
@@ -141,6 +257,14 @@ impl<'a: 'b, 'b> MoreDefaultsBuilder<'a, 'b> {
     self.fbb_.push_slot_always::<flatbuffers::WIPOffset<_>>(MoreDefaults::VT_SOME_STRING, some_string);
   }
   #[inline]
+  pub fn add_abcs(&mut self, abcs: flatbuffers::WIPOffset<flatbuffers::Vector<'b , ABC>>) {
+    self.fbb_.push_slot_always::<flatbuffers::WIPOffset<_>>(MoreDefaults::VT_ABCS, abcs);
+  }
+  #[inline]
+  pub fn add_bools(&mut self, bools: flatbuffers::WIPOffset<flatbuffers::Vector<'b , bool>>) {
+    self.fbb_.push_slot_always::<flatbuffers::WIPOffset<_>>(MoreDefaults::VT_BOOLS, bools);
+  }
+  #[inline]
   pub fn new(_fbb: &'b mut flatbuffers::FlatBufferBuilder<'a>) -> MoreDefaultsBuilder<'a, 'b> {
     let start = _fbb.start_table();
     MoreDefaultsBuilder {
@@ -162,6 +286,8 @@ impl std::fmt::Debug for MoreDefaults<'_> {
       ds.field("floats", &self.floats());
       ds.field("empty_string", &self.empty_string());
       ds.field("some_string", &self.some_string());
+      ds.field("abcs", &self.abcs());
+      ds.field("bools", &self.bools());
       ds.finish()
   }
 }
@@ -172,6 +298,8 @@ pub struct MoreDefaultsT {
   pub floats: Vec<f32>,
   pub empty_string: String,
   pub some_string: String,
+  pub abcs: Vec<ABC>,
+  pub bools: Vec<bool>,
 }
 impl Default for MoreDefaultsT {
   fn default() -> Self {
@@ -180,6 +308,8 @@ impl Default for MoreDefaultsT {
       floats: Default::default(),
       empty_string: "".to_string(),
       some_string: "some".to_string(),
+      abcs: Default::default(),
+      bools: Default::default(),
     }
   }
 }
@@ -204,11 +334,21 @@ impl MoreDefaultsT {
       let x = &self.some_string;
       _fbb.create_string(x)
     });
+    let abcs = Some({
+      let x = &self.abcs;
+      _fbb.create_vector(x)
+    });
+    let bools = Some({
+      let x = &self.bools;
+      _fbb.create_vector(x)
+    });
     MoreDefaults::create(_fbb, &MoreDefaultsArgs{
       ints,
       floats,
       empty_string,
       some_string,
+      abcs,
+      bools,
     })
   }
 }

tests/rust_usage_test/tests/more_defaults_test.rs

@@ -12,6 +12,8 @@ fn object_defaults() {
             floats: Vec::new(),
             empty_string: "".to_string(),
             some_string: "some".to_string(),
+            abcs: Vec::new(),
+            bools: Vec::new(),
         },
     )
 }
@@ -21,6 +23,8 @@ fn nonpresent_values() {
     let m = flatbuffers::root::<MoreDefaults>(&[0; 4]).unwrap();
     assert_eq!(m.ints().len(), 0);
     assert_eq!(m.floats().len(), 0);
+    assert_eq!(m.abcs().len(), 0);
+    assert_eq!(m.bools().len(), 0);
     assert_eq!(m.empty_string(), "");
     assert_eq!(m.some_string(), "some");
 }

tests/test.cpp

@@ -3672,6 +3672,7 @@ void StringVectorDefaultsTest() {
   schemas.push_back("table Monster { mana: [int] = []; }");
   schemas.push_back("table Monster { mana: [uint] = [  ]; }");
   schemas.push_back("table Monster { mana: [byte] = [\t\t\n]; }");
+  schemas.push_back("enum E:int{}table Monster{mana:[E]=[];}");
   for (auto s = schemas.begin(); s < schemas.end(); s++) {
     flatbuffers::Parser parser;
     TEST_ASSERT(parser.Parse(s->c_str()));