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Delphi Error Left Side Cannot Be Assigned To

Embed Share Copy sharable URL for this gist. See the different behaviors in the following code with the explicit getter and setter functions: type TRec = record A: Integer; B: string; end; TForm2 = class(TForm) private FRec : TRec; If you want to stay with a Record, you have to use an intermediate variable (or the Field variable) or use a WITH statement. Are there any saltwater rivers on Earth? have a peek at these guys

Properties used without Get/Set methods can only access a single field in the object's data. asked 7 years ago viewed 11307 times active 2 years ago Blog International salaries at Stack Overflow Linked 3 Delphi “E2064 Left side cannot be assigned to” error appeared when upgrading All of these are illegal. Star 0 Fork 0 martinusso/RecordAsAProperty.pas Created Jun 13, 2012 Embed What would you like to do?

Thanks anyway. Delphi 1 and SQL param - left side of = 7. The following code will produce a compile-time "Left Side Cannot Be Assigned To" error: var testB : TTestClassB; testC : TTestClassC; begin //presume testB and testC are properly created //and I really wouldn't suggest to do such swapping via a property anyway.

You signed in with another tab or window. In Delphi 2010 and above, E2064 is also emitted by the compiler whenever you try to assign a value to a member of a record exposed by a read-only property. However the best way to organise it is to put the access methods (SetRecord, Getrecord) in TBase, not in TDerived. The "left side cannot be assigned to" error message is given by the Delphi compiler when you try to modify a read-only object like a constant, a constant parameter, or the

M.H. You could also convert TRecord to a class, in which case Record.I := Value wouldn't modify Record itself, because Record would be a pointer to the actual object storage. "Ang Houfu" share|improve this answer answered Mar 8 '09 at 4:29 otherchirps 1,45811521 add a comment| up vote 1 down vote The simplest approach is: procedure TForm1.DoSomething(ARec: TRec); begin with Rec do A http://docwiki.embarcadero.com/RADStudio/XE6/en/E2064_Left_side_cannot_be_assigned_to_(Delphi) share|improve this answer answered Mar 6 '09 at 23:22 Toon Krijthe 41.5k19110176 3 +1 Note your solution is not bad, but users of it need to remember that if they

If you access Frecord dirctly from TDerived you will not get any problems. (It's allowed since they share the unit). share|improve this answer answered Mar 30 '11 at 9:06 Marjan Venema 16.1k44668 9 In other words, thank the XE compiler for no longer letting you shoot yourself in the foot. The example assigns to constant parameter, to a constant, and to the result of a function call. You signed out in another tab or window.

How to find position where a sequence drops off to zero Incorrect method to find a tilted asymptote Help! Properties only return or set a value. If after compiling the code you asked yourself: "huh, why does it not compile?!?", here's the answer: A few Class Declaration using a Record Take a look at the following declarations: Why do some softwares have memory leak?

What are the drawbacks of the US making tactical first use of nuclear weapons against terrorist sites? More about the author Referring to a property is then referring to a property on the *copy*, and if the compiler allowed it, it would be a meaningless statement. testC.InnerRecord.Name := 'Delphi'; //ERROR! Why?

How to print labels from left side to right side (Quick Report) 3. All of these are illegal. Over 6800+ delphi tips & tricks on this website are included in DelphiTipsMan, you must try it! check my blog D4 : TRichEdit.pagerect ERROR cannot assign to left part 4.

How do hackers find the IP address of devices? For object-properties a getter and a setter return a pointer to the object - not the object itself. end; Assigning a value to either the CurrentCustomer property or to a member of the record exposed by the CurrentCustomer property results in the compiler emitting this E2064 error.

In the previous versions the compiler didn't complain, but often the results would not be as you would expect as it was acting on a temporary var so your changes would

Troubleshooting Delphi's "Left Side Cannot Be Assigned To" when using Record as a Property Title: Troubleshooting Delphi's "Left Side Cannot Be Assigned To" when using Record as a Property According to current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Using a relay for retro clicky sound - how do I make it louder? program Solve; var c: Integer = 1; (*Use an initialized variable*) procedure p(var s: string); begin s:= 'changed'; (*Use variable parameter*) end; function f: PChar; begin f:= 'Hello'; (*This is fine

Is it possible to setup XE to behave like 2009? Error message - 'Os function failed'0Delphi 2009 causing shell32.dll errors?8The reasons to upgrade from Delphi 20091Delphi 2009 startup error4Delphi compiler error E2064 left side cannot be assigned to3Upgrade from Delphi 7 Divisibility Proof Proof of infinitely many prime numbers Was any city/town/place named "Washington" prior to 1790? news end; end; I get the error Left side cannot be assigned to!

The equivalent in C# is permitted, but it has no effect; the return value of the Rec property is a copy of the underlying field, and assigning to the field on Copy Code program Solve; var c : Integer = 1; (*Use an initialized variable*) procedure p(var s: string); begin s := 'changed'; (*Use variable parameter*) end; function f: PChar; begin f Trying to create safe website where security is handled by the website and not the user Let's do the Wave! I think somebody else may have a better idea than > I do.

How do computers calculate sin values? How to concatenate two images in one ( side by side ) You are here Embarcadero Newsgroups Archived.At embarcadero.public.delphi.ide 2009 October Delphi 2010 Compile error E2064 Left side cannot be assigned If you think version "testB" does not compile because InnerRecord is a read-only property, your are *wrong*! A sign showing grouped opening hours of a cafe How did night fighter aircraft manage to shoot down their foes in World War II?