public static Expression BindField(PhpTypeInfo type, Type classCtx, Expression target, string field, Expression ctx, AccessMask access, Expression rvalue)
{
if (access.Write() != (rvalue != null))
{
throw new ArgumentException();
}
// lookup a declared field
for (var t = type; t != null; t = t.BaseType)
{
foreach (var p in t.DeclaredFields.GetPhpProperties(field))
{
if (p.IsStatic == (target == null) && p.IsVisible(classCtx))
{
return(BindAccess(p.Bind(ctx, target), ctx, access, rvalue));
}
}
}
//
// runtime fields & magic methods
//
if (type.RuntimeFieldsHolder != null) // we don't handle magic methods without the runtime fields
{
var runtimeflds = Expression.Field(target, type.RuntimeFieldsHolder); // Template: target->__runtime_fields
var fieldkey = Expression.Constant(new IntStringKey(field)); // Template: IntStringKey(field)
var resultvar = Expression.Variable(Cache.Types.PhpValue[0], "result"); // Template: PhpValue result;
// Template: runtimeflds != null && runtimeflds.TryGetValue(field, out result)
var trygetfield = Expression.AndAlso(Expression.ReferenceNotEqual(runtimeflds, Expression.Constant(null)), Expression.Call(runtimeflds, Cache.Operators.PhpArray_TryGetValue, fieldkey, resultvar));
// Template: runtimeflds != null && runtimeflds.ContainsKey(field)
var containsfield = Expression.AndAlso(Expression.ReferenceNotEqual(runtimeflds, Expression.Constant(null)), Expression.Call(runtimeflds, Cache.Operators.PhpArray_ContainsKey, fieldkey));
Expression result;
//
if (access.EnsureObject())
{
// (object)target->field->
// Template: runtimeflds.EnsureObject(key)
result = Expression.Call(EnsureNotNullPhpArray(runtimeflds), Cache.Operators.PhpArray_EnsureItemObject, fieldkey);
var __get = BindMagicMethod(type, classCtx, target, ctx, TypeMethods.MagicMethods.__get, field, null);
if (__get != null)
{
// Template: runtimeflds.Contains(key) ? runtimeflds.EnsureObject(key) : ( __get(key) ?? runtimeflds.EnsureObject(key))
return(Expression.Condition(containsfield,
Expression.Call(runtimeflds, Cache.Operators.PhpArray_EnsureItemObject, fieldkey),
InvokeHandler(ctx, target, field, __get, access, result, Cache.Types.Object[0])));
}
else
{
return(result);
}
}
else if (access.EnsureArray())
{
// (IPhpArray)target->field[] =
result = Expression.Call(EnsureNotNullPhpArray(runtimeflds), Cache.Operators.PhpArray_EnsureItemArray, fieldkey);
var __get = BindMagicMethod(type, classCtx, target, ctx, TypeMethods.MagicMethods.__get, field, null);
if (__get != null)
{
// Template: runtimeflds.Contains(key) ? runtimeflds.EnsureArray(key) : ( __get(key) ?? runtimeflds.EnsureArray(key))
return(Expression.Condition(containsfield,
Expression.Call(runtimeflds, Cache.Operators.PhpArray_EnsureItemArray, fieldkey),
InvokeHandler(ctx, target, field, __get, access, result, typeof(IPhpArray))));
}
else
{
// runtimeflds.EnsureItemArray(key)
return(result);
}
}
else if (access.EnsureAlias())
{
// (PhpAlias)&target->field
result = Expression.Call(EnsureNotNullPhpArray(runtimeflds), Cache.Operators.PhpArray_EnsureItemAlias, fieldkey);
var __get = BindMagicMethod(type, classCtx, target, ctx, TypeMethods.MagicMethods.__get, field, null);
if (__get != null)
{
// Template: runtimeflds.Contains(key) ? runtimeflds.EnsureItemAlias(key) : ( __get(key) ?? runtimeflds.EnsureItemAlias(key))
return(Expression.Condition(containsfield,
Expression.Call(runtimeflds, Cache.Operators.PhpArray_EnsureItemAlias, fieldkey),
InvokeHandler(ctx, target, field, __get, access, result, Cache.Types.PhpAlias[0])));
}
else
{
// runtimeflds.EnsureItemAlias(key)
return(result);
}
}
else if (access.Unset())
{
// unset(target->field)
// Template: if (!runtimeflds.RemoveKey(key)) __unset(key)
var removekey = Expression.Call(runtimeflds, Cache.Operators.PhpArray_RemoveKey, fieldkey);
var __unset = BindMagicMethod(type, classCtx, target, ctx, TypeMethods.MagicMethods.__unset, field, null);
if (__unset != null)
{
return(Expression.IfThen(
Expression.OrElse(Expression.ReferenceEqual(runtimeflds, Expression.Constant(null)), Expression.IsFalse(removekey)),
InvokeHandler(ctx, target, field, __unset, access, Expression.Block(), typeof(void))));
}
else
{
// if (runtimeflds != null) runtimeflds.RemoveKey(key)
return(Expression.IfThen(
Expression.ReferenceNotEqual(runtimeflds, Expression.Constant(null)),
removekey));
}
}
else if (access.Write())
{
var __set = BindMagicMethod(type, classCtx, target, ctx, TypeMethods.MagicMethods.__set, field, rvalue);
if (access.WriteAlias())
{
// target->field = (PhpAlias)&rvalue
Debug.Assert(rvalue.Type == typeof(PhpAlias));
rvalue = ConvertExpression.Bind(rvalue, typeof(PhpAlias), ctx);
// EnsureNotNull(runtimeflds).SetItemAlias(key, rvalue)
result = Expression.Call(EnsureNotNullPhpArray(runtimeflds), Cache.Operators.PhpArray_SetItemAlias, fieldkey, rvalue);
if (__set != null)
{
// if (ContainsKey(key)) ? runtimeflds.SetItemAlias(rvalue) : (__set(key, rvalue) ?? runtimeflds.SetItemAlias(key, rvalue)
return(Expression.Condition(containsfield,
Expression.Call(runtimeflds, Cache.Operators.PhpArray_SetItemAlias, fieldkey, rvalue),
InvokeHandler(ctx, target, field, __set, access, result, typeof(void))));
}
else
{
return(result);
}
}
else
{
// target->field = rvalue
rvalue = ConvertExpression.Bind(rvalue, typeof(PhpValue), ctx);
/* Template:
* return runtimeflds != null && runtimeflds.ContainsKey(field)
* ? runtimeflds.SetItemValue(key, rvalue)
* : (__set(field, value) ?? runtimeflds.SetItemValue(key, value))
*/
result = Expression.Call(EnsureNotNullPhpArray(runtimeflds), Cache.Operators.PhpArray_SetItemValue, fieldkey, rvalue);
if (__set != null)
{
return(Expression.Condition(containsfield,
Expression.Call(runtimeflds, Cache.Operators.PhpArray_SetItemValue, fieldkey, rvalue),
InvokeHandler(ctx, target, field, __set, access, result, typeof(void))));
}
else
{
return(result);
}
}
}
else if (access.Isset())
{
// isset(target->field)
var __isset = BindMagicMethod(type, classCtx, target, ctx, TypeMethods.MagicMethods.__isset, field, null);
// Template: (TryGetField(result) || (bool)__isset(key)) ? true : void
result = Expression.Condition(Expression.OrElse(
trygetfield,
ConvertExpression.BindToBool(InvokeHandler(ctx, target, field, __isset, access))),
Expression.Property(null, Cache.Properties.PhpValue_True),
Expression.Field(null, Cache.Properties.PhpValue_Void));
}
else
{
// = target->field
/* Template:
* return runtimeflds.TryGetValue(field, out result) ? result : (__get(field) ?? ERR);
*/
var __get = BindMagicMethod(type, classCtx, target, ctx, TypeMethods.MagicMethods.__get, field, null);
result = Expression.Condition(trygetfield,
resultvar,
InvokeHandler(ctx, target, field, __get, access)); // TODO: @default = { ThrowError; return null; }
}
//
return(Expression.Block(result.Type, new[] { resultvar }, result));
}
// TODO: IDynamicMetaObject
//
return(null);
}
public static Expression NewPhpArray(Expression ctx, IEnumerable <Expression> values)
{
return(Expression.Call(
typeof(PhpArray), "New", Cache.Types.Empty, // PhpArray.New(values[])
Expression.NewArrayInit(typeof(PhpValue), values.Select(x => ConvertExpression.Bind(x, typeof(PhpValue), ctx)))));
}
static Expression BindAccess(Expression expr, Expression ctx, AccessMask access, Expression rvalue)
{
if (access.EnsureObject())
{
if (expr.Type == typeof(PhpAlias))
{
// ((PhpAlias)fld).EnsureObject()
expr = Expression.Call(expr, Cache.Operators.PhpAlias_EnsureObject);
}
else if (expr.Type == typeof(PhpValue))
{
// ((PhpValue)fld).EnsureObject()
expr = Expression.Call(expr, Cache.Operators.PhpValue_EnsureObject);
}
else
{
// getter // TODO: ensure it is not null
Debug.Assert(!expr.Type.GetTypeInfo().IsValueType);
}
}
else if (access.EnsureArray())
{
if (expr.Type == typeof(PhpAlias))
{
// ((PhpAlias)fld).EnsureArray()
expr = Expression.Call(expr, Cache.Operators.PhpAlias_EnsureArray);
}
else if (expr.Type == typeof(PhpValue))
{
// ((PhpValue)fld).EnsureArray()
expr = Expression.Call(expr, Cache.Operators.PhpValue_EnsureArray);
}
else if (expr.Type == typeof(PhpArray))
{
// (PhpArray)fld // TODO: ensure it is not null
}
else
{
// Operators.EnsureArray( fld )
// TODO: string
expr = Expression.Call(Cache.Operators.Object_EnsureArray, expr);
}
}
else if (access.EnsureAlias())
{
if (expr.Type == typeof(PhpAlias))
{
// (PhpAlias)getter
}
else if (expr.Type == typeof(PhpValue))
{
// ((PhpValue)fld).EnsureAlias()
expr = Expression.Call(expr, Cache.Operators.PhpValue_EnsureAlias);
}
else
{
// getter // cannot read as reference
}
}
else if (access.WriteAlias())
{
// write alias
Debug.Assert(rvalue.Type == typeof(PhpAlias));
rvalue = ConvertExpression.Bind(rvalue, typeof(PhpAlias), ctx);
if (expr.Type == typeof(PhpAlias))
{
// ok
}
else if (expr.Type == typeof(PhpValue))
{
// fld = PhpValue.Create(alias)
rvalue = Expression.Call(typeof(PhpValue).GetMethod("Create", Cache.Types.PhpAlias), rvalue);
}
else
{
// fld is not aliasable
Debug.Assert(false, "Cannot assign aliased value to field of type " + expr.Type.ToString());
rvalue = ConvertExpression.Bind(rvalue, expr.Type, ctx);
}
expr = Expression.Assign(expr, rvalue);
}
else if (access.Unset())
{
Debug.Assert(rvalue == null);
expr = Expression.Assign(expr, ConvertExpression.BindDefault(expr.Type));
}
else if (access.Write())
{
// write by value
if (expr.Type == typeof(PhpAlias))
{
// Template: fld.Value = (PhpValue)value
expr = Expression.Assign(Expression.PropertyOrField(expr, "Value"), ConvertExpression.Bind(rvalue, typeof(PhpValue), ctx));
}
else if (expr.Type == typeof(PhpValue))
{
// Template: Operators.SetValue(ref fld, (PhpValue)value)
expr = Expression.Call(Cache.Operators.SetValue_PhpValueRef_PhpValue, expr, ConvertExpression.Bind(rvalue, typeof(PhpValue), ctx));
}
else
{
// Template: fld = value
// default behaviour by value to value
expr = Expression.Assign(expr, ConvertExpression.Bind(rvalue, expr.Type, ctx));
}
}
else if (access.ReadCopy())
{
// dereference & copy
if (expr.Type == typeof(PhpValue))
{
// Template: value.GetValue().DeepCopy()
expr = Expression.Call(Expression.Call(expr, Cache.Operators.PhpValue_GetValue), Cache.Operators.PhpValue_DeepCopy);
}
else if (expr.Type == typeof(PhpAlias))
{
}
}
//
return(expr);
}
protected override Expression BindMissingMethod(CallSiteContext bound)
{
var name_expr = (_name != null) ? Expression.Constant(_name) : bound.IndirectName;
// resolve target expression:
var isobject = bound.TargetType != null;
if (isobject == false)
{
/* Template:
* PhpException.MethodOnNonObject(name_expr);
* return NULL;
*/
var throwcall = Expression.Call(typeof(PhpException), "MethodOnNonObject", Array.Empty <Type>(), ConvertExpression.Bind(name_expr, typeof(string), bound.Context));
return(Expression.Block(throwcall, ConvertExpression.BindDefault(this.ReturnType)));
}
var call = BinderHelpers.FindMagicMethod(bound.TargetType, TypeMethods.MagicMethods.__call);
if (call != null)
{
Expression[] call_args;
if (call.Methods.All(IsClrMagicCallWithParams))
{
// Template: target.__call(name, arg1, arg2, ...)
// flatterns the arguments:
call_args = ArrayUtils.AppendRange(name_expr, bound.Arguments);
}
else
{
// Template: target.__call(name, array)
// regular PHP behavior:
call_args = new Expression[]
{
name_expr,
BinderHelpers.NewPhpArray(bound.Arguments, bound.Context, bound.ClassContext),
};
}
return(OverloadBinder.BindOverloadCall(_returnType, bound.TargetInstance, call.Methods, bound.Context, call_args, false));
}
return(base.BindMissingMethod(bound));
}
