/// <summary>
/// Seals this builder and returns a type that corresponds to the type
/// represented by this builder.
/// </summary>
/// <returns>The create type node.</returns>
public TypeNode Seal()
{
// Check for a special case in which we require custom padding elements
// NB: Prevent empty structures by ensuring we have at least one field
// that is not padding.
if (Count == 0 && AlignedSize < Size)
{
Add(TypeContext.Padding8Type.PrimitiveType);
}
// If the structure has a single field, apply padding using the size
// of the initial field. This allows us to fill a fixed buffer with
// the correct/aligned type.
if (Count == 1 && AlignedSize < Size)
{
var basicValueType = allFieldsBuilder[0].BasicValueType;
var paddingType = TypeContext.GetPaddingType(basicValueType);
for (int i = AlignedSize, e = Size; i < e; i += paddingType.Size)
{
Add(paddingType);
}
}
// Ensure that the structure is populated to its required size before
// we finalize. CAUTION: we have to ignore cases in which this type
// contains types that will be lowered in future stages.
if ((typeFlags & TypeFlags.ViewDependent) == TypeFlags.None)
{
for (int i = AlignedSize, e = Size; i < e; ++i)
{
Add(TypeContext.Padding8Type);
}
}
return(TypeContext.FinishStructureType(this));
}