.NET binding to GF by Bjørnar Luteberget

1 files changed, 34 insertions, 0 deletions

diff --git a/src/runtime/dotNet/Expr/MetaVariable.cs b/src/runtime/dotNet/Expr/MetaVariable.cs
new file mode 100644
index 000000000..30ead9004
--- /dev/null
+++ b/src/runtime/dotNet/Expr/MetaVariable.cs
@@ -0,0 +1,34 @@
+using System;
+using System.Runtime.InteropServices;
+
+namespace PGFSharp
+{
+	public class MetaVariableExpr : Expr {
+
+		internal MetaVariableExpr() {
+			_pool = new NativeGU.NativeMemoryPool();
+			IntPtr exprMetaPtr = NativeGU.gu_alloc_variant ((byte)PgfExprTag.PGF_EXPR_META,
+				(UIntPtr)Marshal.SizeOf <NativePgfExprMeta>(), UIntPtr.Zero, ref _ptr, _pool.Ptr);
+
+			Native.EditStruct<NativePgfExprMeta> (exprMetaPtr, (ref NativePgfExprMeta m) => m.Id = 0);
+		}
+
+		internal MetaVariableExpr(IntPtr ptr, NativeGU.NativeMemoryPool pool) : base(ptr, pool) {	}
+
+
+		public int Id => Data.Id;
+	    private NativePgfExprMeta Data => Marshal.PtrToStructure<NativePgfExprMeta>(DataPtr);
+
+		public override R Accept<R> (IVisitor<R> visitor)
+		{
+            //	return visitor.VisitMetaVariable (Id);
+
+			// Not supported yet.
+			throw new NotImplementedException();
+		}
+
+		[StructLayout(LayoutKind.Sequential)]
+		private struct NativePgfExprMeta { public int Id; }
+	}
+}
+