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 bool VisitField_decl([NotNull] FlatBuffersParser.Field_declContext context)
{
string name = context.IDENT().GetText();
ErrorContext.Current.WithScope(name, () =>
{
Dictionary <string, string?> metadata = new MetadataVisitor().VisitMetadata(context.metadata());
var(fieldType, vectorType, structVectorLength) = GetFbsFieldType(context, metadata);
var definition = new FieldDefinition(this.parent, name, fieldType)
{
VectorType = vectorType,
};
string?defaultValue = context.defaultValue_decl()?.GetText();
if (defaultValue == "null")
{
definition.IsOptionalScalar = true;
}
else if (!string.IsNullOrEmpty(defaultValue))
{
definition.DefaultValue = defaultValue;
}
// standard metadata
definition.Deprecated = metadata.ParseBooleanMetadata(MetadataKeys.Deprecated);
definition.IsKey = metadata.ParseBooleanMetadata(MetadataKeys.Key);
// Flatsharp custom metadata
definition.SortedVector = metadata.ParseBooleanMetadata(MetadataKeys.SortedVector, MetadataKeys.SortedVectorLegacy);
definition.SharedString = metadata.ParseBooleanMetadata(MetadataKeys.SharedString, MetadataKeys.SharedStringLegacy);
definition.NonVirtual = metadata.ParseNullableBooleanMetadata(MetadataKeys.NonVirtualProperty, MetadataKeys.NonVirtualPropertyLegacy);
definition.ForceWrite = metadata.ParseNullableBooleanMetadata(MetadataKeys.ForceWrite);
this.ParseIdMetadata(definition, metadata);
definition.SetterKind = metadata.ParseMetadata(
new[] { MetadataKeys.Setter, MetadataKeys.SetterLegacy },
ParseSetterKind,
SetterKind.Public,
SetterKind.Public);
if (structVectorLength == null)
{
this.parent.Fields.Add(definition);
}
else if (this.parent.IsTable)
{
ErrorContext.Current.RegisterError("Only structs may contain fixed-length vectors");
}
else
{
List <string> groupNames = new List <string>();
for (int i = 0; i < structVectorLength.Value; ++i)
{
string name = $"__flatsharp__{definition.Name}_{i}";
this.parent.Fields.Add(definition with
{
Name = name,
SetterKind = SetterKind.Protected,
GetterModifier = AccessModifier.Protected,
CustomGetter = $"{definition.Name}[{i}]"
});
groupNames.Add(name);
}