예제 #1
0
        public override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
        {
            var restrictions = BindingRestrictions.Empty;

            PhpTypeInfo phptype;
            Expression  target_expr;

            //
            var ctx     = args[0];
            var fldName = ResolveName(args, ref restrictions);

            //
            if (target.LimitType == typeof(PhpTypeInfo))    // static field
            {
                target_expr = null;
                phptype     = (PhpTypeInfo)target.Value;

                //
                restrictions = restrictions.Merge(BindingRestrictions.GetInstanceRestriction(target.Expression, phptype));
            }
            else
            {
                var isobject = BinderHelpers.TryTargetAsObject(target, out DynamicMetaObject instance);
                restrictions = restrictions.Merge(instance.Restrictions);

                if (isobject == false)
                {
                    var defaultexpr = ConvertExpression.BindDefault(_returnType);

                    if (!_access.Quiet())
                    {
                        // PhpException.VariableMisusedAsObject(target, _access.ReadRef)
                        var throwcall = Expression.Call(typeof(PhpException), "VariableMisusedAsObject", Array.Empty <Type>(),
                                                        ConvertExpression.BindToValue(target.Expression), Expression.Constant(_access.EnsureAlias()));
                        defaultexpr = Expression.Block(throwcall, defaultexpr);
                    }

                    return(new DynamicMetaObject(defaultexpr, restrictions));
                }

                phptype     = instance.RuntimeType.GetPhpTypeInfo();
                target_expr = target_expr = Expression.Convert(instance.Expression, instance.RuntimeType);
            }

            Debug.Assert(IsClassConst == (target_expr == null));

            //
            var getter = IsClassConst
                ? BinderHelpers.BindClassConstant(phptype, _classContext, fldName, ctx.Expression)
                : BinderHelpers.BindField(phptype, _classContext, target_expr, fldName, ctx.Expression, _access, null);

            if (getter != null)
            {
                //
                return(new DynamicMetaObject(ConvertExpression.Bind(getter, _returnType, ctx.Expression), restrictions));
            }

            // field not found
            throw new NotImplementedException();
        }
예제 #2
0
        public override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
        {
            bool hasTargetInstance = (target.LimitType != typeof(TargetTypeParam));

            var bound = new CallSiteContext(!hasTargetInstance)
            {
                ClassContext = _classContext,
                Name         = _name
            }
            .ProcessArgs(target, args, hasTargetInstance);

            if (hasTargetInstance)
            {
                var isobject = bound.TargetType != null;
                if (isobject == false)
                {
                    var defaultexpr = ConvertExpression.BindDefault(_returnType);

                    if (!_access.Quiet())
                    {
                        // PhpException.VariableMisusedAsObject(target, _access.ReadRef)
                        var throwcall = BinderHelpers.VariableMisusedAsObject(target.Expression, _access.EnsureAlias());
                        defaultexpr = Expression.Block(throwcall, defaultexpr);
                    }

                    return(new DynamicMetaObject(defaultexpr, bound.Restrictions));
                }

                // instance := (T)instance
                bound.TargetInstance = Expression.Convert(bound.TargetInstance, bound.TargetType.Type);
            }

            Debug.Assert(IsClassConst ? (bound.TargetInstance == null) : true);

            //
            var getter = IsClassConst
                ? BinderHelpers.BindClassConstant(bound.TargetType, bound.ClassContext, bound.Name, bound.Context)
                : BinderHelpers.BindField(bound.TargetType, bound.ClassContext, bound.TargetInstance, bound.Name, bound.Context, _access, null);

            if (getter != null)
            {
                //
                return(new DynamicMetaObject(ConvertExpression.Bind(getter, _returnType, bound.Context), bound.Restrictions));
            }

            if (IsClassConst)
            {
                // error: constant not defined
                // ...
            }

            // unreachable: property not found
            throw new InvalidOperationException($"{bound.TargetType.Name}::{bound.Name} could not be resolved.");
        }
예제 #3
0
        public override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args)
        {
            bool hasTargetInstance = (target.LimitType != typeof(TargetTypeParam));

            var bound = new CallSiteContext()
            {
                ClassContext = _classContext,
                Name         = _name
            }
            .ProcessArgs(target, args, hasTargetInstance);

            if (hasTargetInstance)
            {
                var isobject = bound.TargetType != null;
                if (isobject == false)
                {
                    var defaultexpr = ConvertExpression.BindDefault(_returnType);

                    if (!_access.Quiet())
                    {
                        // PhpException.VariableMisusedAsObject(target, _access.ReadRef)
                        var throwcall = Expression.Call(typeof(PhpException), "VariableMisusedAsObject", Array.Empty <Type>(),
                                                        ConvertExpression.BindToValue(target.Expression), Expression.Constant(_access.EnsureAlias()));
                        defaultexpr = Expression.Block(throwcall, defaultexpr);
                    }

                    return(new DynamicMetaObject(defaultexpr, bound.Restrictions));
                }

                // instance := (T)instance
                bound.TargetInstance = Expression.Convert(bound.TargetInstance, bound.TargetType.Type.AsType());
            }

            Debug.Assert(IsClassConst ? (bound.TargetInstance == null) : true);

            //
            var getter = IsClassConst
                ? BinderHelpers.BindClassConstant(bound.TargetType, bound.ClassContext, bound.Name, bound.Context)
                : BinderHelpers.BindField(bound.TargetType, bound.ClassContext, bound.TargetInstance, bound.Name, bound.Context, _access, null);

            if (getter != null)
            {
                //
                return(new DynamicMetaObject(ConvertExpression.Bind(getter, _returnType, bound.Context), bound.Restrictions));
            }

            // field not found
            throw new NotImplementedException();
        }