public Expression Map(BondDataType?expectedKeyType, BondDataType?expectedValueType, MapHandler handler)
{
Debug.Assert(schema.IsMap);
var count = Expression.Variable(typeof(int), "count");
var loop = handler(
new UntaggedParser <R>(this, schema.GetKeySchema()),
new UntaggedParser <R>(this, schema.GetElementSchema()),
Expression.Constant(schema.TypeDef.key.id),
Expression.Constant(schema.TypeDef.element.id),
Expression.GreaterThan(Expression.PostDecrementAssign(count), Expression.Constant(0)),
Expression.Empty(),
count);
return(Expression.Block(
new[] { count },
Expression.Assign(count, reader.ReadContainerBegin()),
loop,
reader.ReadContainerEnd()));
}
Expression Map(IParser parser, RuntimeSchema schema)
{
var expectedValueType = schema.HasValue ? schema.TypeDef.element.id : (BondDataType?)null;
var expectedKeyType = schema.HasValue ? schema.TypeDef.key.id : (BondDataType?)null;
return(parser.Map(expectedKeyType, expectedValueType,
(keyParser, valueParser, keyType, valueType, nextKey, nextValue, count) =>
Expression.Block(
writer.WriteContainerBegin(count, keyType, valueType),
ControlExpression.While(nextKey,
Expression.Block(
writer.WriteItemBegin(),
schema.HasValue ?
Value(keyParser, keyType, schema.GetKeySchema()) :
Value(keyParser, keyType),
writer.WriteItemEnd(),
nextValue,
writer.WriteItemBegin(),
schema.HasValue ?
Value(valueParser, valueType, schema.GetElementSchema()) :
Value(valueParser, valueType),
writer.WriteItemEnd())),
writer.WriteContainerEnd())));
}