public override UnionDefinition VisitUnion_decl([NotNull] FlatBuffersParser.Union_declContext context)
{
this.unionDef = new UnionDefinition(context.IDENT().GetText(), this.parent);
var metadata = new MetadataVisitor().VisitMetadata(context.metadata());
if (metadata.ContainsKey("NoCustomType"))
{
this.unionDef.GenerateCustomUnionType = false;
}
ErrorContext.Current.WithScope(this.unionDef.Name, () =>
{
base.VisitUnion_decl(context);
});
return(this.unionDef);
}
public override FieldDefinition VisitField_decl([NotNull] FlatBuffersParser.Field_declContext context)
{
this.definition.Name = context.IDENT().GetText();
ErrorContext.Current.WithScope(this.definition.Name, () =>
{
Dictionary <string, string> metadata = new MetadataVisitor().VisitMetadata(context.metadata());
string fbsFieldType = context.type().GetText();
this.definition.VectorType = VectorType.None;
if (fbsFieldType.StartsWith("["))
{
this.definition.VectorType = VectorType.IList;
// Trim the starting and ending square brackets.
fbsFieldType = fbsFieldType.Substring(1, fbsFieldType.Length - 2);
this.definition.VectorType = VectorType.IList;
if (metadata.TryGetValue("vectortype", out string vectorTypeString))
{
if (!Enum.TryParse <VectorType>(vectorTypeString, true, out var vectorType))
{
ErrorContext.Current?.RegisterError($"Unable to parse '{vectorTypeString}' as a vector type. Valid choices are: {string.Join(", ", Enum.GetNames(typeof(VectorType)))}.");
}
this.definition.VectorType = vectorType;
}
}
else if (metadata.ContainsKey("vectortype"))
{
ErrorContext.Current?.RegisterError($"Non-vectors may not have the 'vectortype' attribute. Field = '{this.definition.Name}'");
}
this.definition.FbsFieldType = fbsFieldType;
string defaultValue = context.scalar()?.GetText();
if (!string.IsNullOrEmpty(defaultValue))
{
this.definition.DefaultValue = defaultValue;
}
if (metadata.ContainsKey("deprecated"))
{
this.definition.Deprecated = true;
}
if (metadata.ContainsKey("key"))
{
this.definition.IsKey = true;
}
if (metadata.ContainsKey("sortedvector"))
{
this.definition.SortedVector = true;
}
// Attributes from FlatBuffers that we don't support.
string[] unsupportedAttributes =
{
"id", "required", "force_align", "bit_flags", "flexbuffer", "hash", "original_order"
};
foreach (var unsupportedAttribute in unsupportedAttributes)
{
if (metadata.ContainsKey(unsupportedAttribute))
{
ErrorContext.Current?.RegisterError($"FlatSharpCompiler does not support the '{unsupportedAttribute}' attribute in FBS files.");
}
}
});
return(this.definition);
}
public override TableOrStructDefinition VisitType_decl([NotNull] FlatBuffersParser.Type_declContext context)
{
Dictionary <string, string?> metadata = new MetadataVisitor().Visit(context.metadata());
TableOrStructDefinition definition = new TableOrStructDefinition(
context.IDENT().GetText(),
this.parent);
ErrorContext.Current.WithScope(definition.Name, () =>
{
definition.IsTable = context.GetChild(0).GetText() == "table";
definition.NonVirtual = metadata.ParseNullableBooleanMetadata(MetadataKeys.NonVirtualProperty, MetadataKeys.NonVirtualPropertyLegacy);
definition.ForceWrite = metadata.ParseNullableBooleanMetadata(MetadataKeys.ForceWrite);
definition.DefaultConstructorKind = metadata.ParseMetadata <DefaultConstructorKind?>(
new[] { MetadataKeys.DefaultConstructorKind },
ParseDefaultConstructorKind,
DefaultConstructorKind.Public,
DefaultConstructorKind.Public);
definition.RequestedSerializer = metadata.ParseMetadata <FlatBufferDeserializationOption?>(
new[] { MetadataKeys.SerializerKind, MetadataKeys.PrecompiledSerializerLegacy },
ParseSerializerKind,
FlatBufferDeserializationOption.Default,
null);
if (!definition.IsTable && definition.RequestedSerializer is not null)
{
ErrorContext.Current.RegisterError("Structs may not have serializers.");
}
if (!definition.IsTable && definition.ForceWrite is not null)
{
ErrorContext.Current.RegisterError($"Structs may not use the '{MetadataKeys.ForceWrite}' attribute.");
}
if (metadata.ContainsKey(MetadataKeys.ObsoleteDefaultConstructorLegacy))
{
ErrorContext.Current.RegisterError($"The '{MetadataKeys.ObsoleteDefaultConstructorLegacy}' metadata attribute has been deprecated. Please use the '{MetadataKeys.DefaultConstructorKind}' attribute instead.");
}
if (metadata.TryGetValue(MetadataKeys.FileIdentifier, out var fileId))
{
if (!definition.IsTable)
{
ErrorContext.Current.RegisterError("Structs may not have file identifiers.");
}
definition.FileIdentifier = fileId;
}
var fields = context.field_decl();
if (fields != null)
{
foreach (var f in fields)
{
new FieldVisitor(definition).VisitField_decl(f);
}
}
});
return(definition);
}
