[Lazarus] Some strange effects in the IDE

[Mattias Gaertner]

On Thu, 21 Jul 2011 19:15:50 +0100
Hans-Peter Diettrich <DrDiettrich1 at aol.com> wrote:

> The code tools seem to have problems in parsing "case" statements, and 
> with debugging "while" statements. See this code snippet:
> 
> //determine XML lines to copy
>    while PFirst < XLast do begin
>    //copy until PFirst
>      while XFirst < PFirst do begin
>        dst.Add(Strings[XFirst]); inc(XFirst);
>      end;
>    //merge patch
>      dst.Add(DiffFile.Strings[DFirst]); inc(DFirst); //copy diff range 
> header
>      case DiffSec.c of
>      'a',
>      'c',
>      'd': //delete P (insert Diff lines before P?)
>        begin // <---------------- this is line 134 --------------
>          while DFirst <= DLast do begin
> ...
> 
> When navigating in this file (e.g. CTRL-SHIFT up/dn), the cursor is 
> positioned at the marked line, at the "in" of "begin". The error message is:
> uxml.pas(134,10) Error: identifier expected, but in found
> (complete file uploaded with Mantis #19783)
> 
> Does the parser have problems with character literals (and other 
> expressions) as case labels?

The codetools itself uses a lot of them.

Can you reproduce it? For example edit something in front, so that the
parser reparses the code in question.

I think I saw something fishy with undo that sometimes the source
editor does not commit the changes to the codetools. Maybe this is the
case here.


> BTW the unit compiles, i.e. contains no real syntax errors.
>[...]

Mattias