|
private MakeTemp ( |
||
| type | The type for the temporary variable to create. | |
| 리턴 | ParameterExpression | |
internal override Expression AsExpression(Expression target)
{
if (target.Type.IsValueType && MemberBinding.Member is Reflection.PropertyInfo)
{
throw Error.CannotAutoInitializeValueTypeMemberThroughProperty(MemberBinding.Member);
}
RequireNotRefInstance(target);
var member = Expression.MakeMemberAccess(target, MemberBinding.Member);
var memberTemp = StackSpiller.MakeTemp(member.Type);
var block = new Expression[_bindings.Count + 2];
block[0] = Expression.Assign(memberTemp, member);
for (var i = 0; i < _bindings.Count; i++)
{
var br = _bindingRewriters[i];
block[i + 1] = br.AsExpression(memberTemp);
}
// We need to copy back value types
if (memberTemp.Type.IsValueType)
{
block[_bindings.Count + 1] = Expression.Block(
typeof(void),
Expression.Assign(Expression.MakeMemberAccess(target, MemberBinding.Member), memberTemp)
);
}
else
{
block[_bindings.Count + 1] = Expression.Empty();
}
return(MakeBlock(block));
}
internal override Expression AsExpression(Expression target)
{
RequireNotRefInstance(target);
var member = Expression.MakeMemberAccess(target, MemberBinding.Member);
var memberTemp = StackSpiller.MakeTemp(member.Type);
return(MakeBlock(
Expression.Assign(memberTemp, _rhs),
Expression.Assign(member, memberTemp),
Expression.Empty()
));
}
private Expression SpillByRef(List <Expression> comma, Expression expression)
{
List <Expression> writebacks = null;
RewriteByRefArgument(null, ref expression, (type, name) => _self.MakeTemp(type), comma, ref writebacks);
if (writebacks != null)
{
// TODO: Make a call on supporting writebacks or not and either remove them altogether
// or provide a good error message here.
throw new NotSupportedException();
}
return(expression);
}
internal override Expression AsExpression(Expression target)
{
if (target.Type.IsValueType && MemberBinding.Member is Reflection.PropertyInfo)
{
throw Error.CannotAutoInitializeValueTypeElementThroughProperty(MemberBinding.Member);
}
RequireNotRefInstance(target);
var member = Expression.MakeMemberAccess(target, MemberBinding.Member);
var memberTemp = StackSpiller.MakeTemp(member.Type);
var block = new Expression[_inits.Count + 2];
block[0] = Expression.Assign(memberTemp, member);
for (var i = 0; i < _inits.Count; i++)
{
var cr = _childRewriters[i];
var add = cr.Finish(Expression.Call(memberTemp, _inits[i].AddMethod, cr[0, -1]));
block[i + 1] = add.Node;
}
// We need to copy back value types
if (memberTemp.Type.IsValueType)
{
block[_inits.Count + 1] = Expression.Block(
typeof(void),
Expression.Assign(Expression.MakeMemberAccess(target, MemberBinding.Member), memberTemp)
);
}
else
{
block[_inits.Count + 1] = Expression.Empty();
}
return(MakeBlock(block));
}
