/// <summary>
/// Get the bracketed (structured) linearization of an expression.
/// </summary>
/// <param name="e"></param>
/// <returns></returns>
public Bracket BracketedLinearize(Expr e)
{
var tmp_pool = new NativeGU.NativeMemoryPool();
var exn = new NativeGU.NativeExceptionContext(tmp_pool);
var cts = Native.pgf_lzr_concretize(Ptr, e.Ptr, exn.Ptr, tmp_pool.Ptr);
var ctree = IntPtr.Zero;
NativeGU.gu_enum_next(cts, ref ctree, tmp_pool.Ptr);
if (ctree == IntPtr.Zero)
{
return(null);
}
ctree = Native.pgf_lzr_wrap_linref(ctree, tmp_pool.Ptr);
var builder = new Bracket.BracketBuilder();
var mem = Marshal.AllocHGlobal(Marshal.SizeOf <Native.PgfLinFuncs>());
Marshal.StructureToPtr <Native.PgfLinFuncs>(builder.LinFuncs, mem, false);
Native.pgf_lzr_linearize(Ptr, ctree, 0, ref mem, tmp_pool.Ptr);
var b = builder.Build();
Marshal.FreeHGlobal(mem);
return(b);
}
public static IEnumerable <IntPtr> IteratorToIEnumerable(IntPtr iterator, IntPtr pool)
{
IntPtr ptr = IntPtr.Zero;
NativeGU.gu_enum_next(iterator, ref ptr, pool);
while (ptr != IntPtr.Zero)
{
yield return(ptr);
NativeGU.gu_enum_next(iterator, ref ptr, pool);
}
}