Class SyntaxError

src/main/java/wyil/lang/WyilFile.java:7275–7330

	// ============================================================
	public interface Attr {
		public static class SyntaxError extends AbstractItem implements Syntactic.Marker {

			public SyntaxError(int errcode, Syntactic.Item target) {
				super(ATTR_error, BigInteger.valueOf(errcode).toByteArray(), target, new Tuple<>());
			}

			public SyntaxError(int errcode, Syntactic.Item target, Tuple<Syntactic.Item> context) {
				super(ATTR_error, BigInteger.valueOf(errcode).toByteArray(), target, context);
			}

			@Override
			public Syntactic.Item getTarget() {
				return operands[0];
			}

			public Tuple<Syntactic.Item> getContext() {
				return (Tuple<Syntactic.Item>) operands[1];
			}

			/**
			 * Get the error code associated with this message
			 *
			 * @return
			 */
			public int getErrorCode() {
				return new BigInteger(getData()).intValue();
			}

			@Override
			public Syntactic.Item clone(Syntactic.Item[] operands) {
				return new SyntaxError(getErrorCode(), operands[0], (Tuple<Syntactic.Item>) operands[1]);
			}

			@Override
			public String getMessage() {
				// Done
				return ErrorMessages.getErrorMessage(getErrorCode(), getContext());
			}

			@Override
			public Trie getSource() {
				WyilFile bin = (WyilFile) getTarget().getHeap();
				Decl.Unit unit = getTarget().getAncestor(Decl.Unit.class);
				String nameStr = unit.getName().toString().replace("::", "/");
				return Trie.fromString(nameStr);
			}

			public static final Descriptor DESCRIPTOR_0 = new Descriptor(Operands.MANY, Data.TWO, "ATTR_error") {
				@SuppressWarnings("unchecked")
				@Override
				public Syntactic.Item construct(int opcode, Syntactic.Item[] operands, byte[] data) {
					int errcode = new BigInteger(data).intValue();
					return new SyntaxError(errcode, operands[0], (Tuple<Syntactic.Item>) operands[1]);
				}
			};
		}

		public static class StackFrame extends AbstractItem {