public static RecordStructuralTypeMember FromJson(Json.Expression expression)
{
if (expression is not Json.ArrayExpression array)
{
throw new BonsaiParseException("Expected a JSON array for a record structural type member definition.", expression);
}
if (array.ElementCount != 2)
{
throw new BonsaiParseException("Expected 2 JSON array elements for a record structural type member definition.", expression);
}
var nameExpr = array.GetElement(0);
if (nameExpr.NodeType != Json.ExpressionType.String)
{
throw new BonsaiParseException("Expected a JSON string in 'node[0]' for the name of a record structural type member definition.", expression);
}
var name = (string)((Json.ConstantExpression)nameExpr).Value;
var type = TypeRef.FromJson(array.GetElement(1));
return(new RecordStructuralTypeMember {
Name = name, Type = type
});
}
public static GenericTypeDef FromJson(Json.ArrayExpression type)
{
if (type.ElementCount != 3)
{
throw new BonsaiParseException("Expected 3 JSON array elements for a generic type definition.", type);
}
var typeDef = TypeRef.FromJson(type.GetElement(1));
if (type.GetElement(2) is not Json.ArrayExpression args)
{
throw new BonsaiParseException("Expected a JSON array in 'node[2]' for the type arguments of a generic type definition.", type);
}
var n = args.ElementCount;
if (n < 1)
{
throw new BonsaiParseException("Expected at least 1 JSON array element in 'node[2]' for the type arguments of a generic type definition.", type);
}
var typeArgs = new TypeRef[n];
for (var i = 0; i < n; i++)
{
var arg = args.GetElement(i);
var typeRef = TypeRef.FromJson(arg);
typeArgs[i] = typeRef;
}
return(new GenericTypeDef(typeDef, typeArgs));
}
public static AnonymousStructuralTypeMember FromJson(Json.Expression expression)
{
if (expression is not Json.ArrayExpression array)
{
throw new BonsaiParseException("Expected a JSON array for an anonymous structural type member definition.", expression);
}
var count = array.ElementCount;
if (count is not 2 and not 3)
{
throw new BonsaiParseException("Expected 2 or 3 JSON array elements for an anonymous structural type member definition.", expression);
}
var nameExpr = array.GetElement(0);
if (nameExpr.NodeType != Json.ExpressionType.String)
{
throw new BonsaiParseException("Expected a JSON string in 'node[0]' for the name of an anonymous structural type member definition.", expression);
}
var name = (string)((Json.ConstantExpression)nameExpr).Value;
var type = TypeRef.FromJson(array.GetElement(1));
var isKey = true;
if (count == 3)
{
var isKeyExpr = array.GetElement(2);
if (isKeyExpr.NodeType != Json.ExpressionType.Boolean)
{
throw new BonsaiParseException("Expected a JSON Boolean in 'node[2]' for IsKey flag of an anonymous structural type member definition.", expression);
}
isKey = (bool)((Json.ConstantExpression)isKeyExpr).Value;
}
return(new AnonymousStructuralTypeMember {
Name = name, Type = type, IsKey = isKey
});
}
public static ArrayTypeDef FromJson(Json.ArrayExpression type)
{
var count = type.ElementCount;
if (count is not(2 or 3))
{
throw new BonsaiParseException("Expected 2 or 3 JSON array elements for an array type definition.", type);
}
var elementType = TypeRef.FromJson(type.GetElement(1));
var rank = default(int?);
if (count == 3)
{
if (type.GetElement(2) is not Json.ConstantExpression rankJson || !int.TryParse((string)rankJson.Value, out int value))
{
throw new BonsaiParseException("Expected a JSON number in 'node[2]' for the rank of an array type definition.", type);
}
rank = value;
}
return(new ArrayTypeDef(elementType, rank));
}
