internal static Expression FromPtr(IntPtr expr, NativeGU.NativeMemoryPool pool)
{
var Tag = (PgfExprTag)NativeGU.gu_variant_open(expr).Tag;
if (factories.ContainsKey(Tag))
{
return(factories[Tag](expr, pool));
}
else
{
return(new UnsupportedExpression(expr, pool));
}
}
internal new static Expression FromPtr(IntPtr expr, NativeGU.NativeMemoryPool pool)
{
var dataPtr = NativeGU.gu_variant_open(expr).Data; // PgfExprLit*
var data = Marshal.PtrToStructure <NativePgfExprLit>(dataPtr);
var literalTag = (PgfLiteralTag)NativeGU.gu_variant_open(data.lit).Tag;
switch (literalTag)
{
case PgfLiteralTag.PGF_LITERAL_STR:
return(new LiteralStringExpression(expr, pool));
case PgfLiteralTag.PGF_LITERAL_INT:
return(new LiteralIntExpression(expr, pool));
case PgfLiteralTag.PGF_LITERAL_FLT:
return(new LiteralFloatExpression(expr, pool));
default:
throw new ArgumentException();
}
}
