Can't set an TmenuItem.onclick event in property editor.
lazarus / 10-Designer

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Andyk · 2012-06-12 12:17

When I try and set this, the IDE tries to do a syntax check of the
whole project and fails on a new unit I have added which uses advanced
delphi style records with operator overloading.

It tells me I have to fix this error first even though there is no
error in the unit, fpc is happy to compile the unit and it runs OK.

Editor is v0.9.30.4 and fpc version 2.6.0

It seems the IDE syntax checker is not compatible with the fpc version
being used.

This is the code it fails on

Quoteunit MComplex;
{$mode delphi}
interface

uses SysUtils,math;

type
  Tcomplex=record
      r,i:double;
    public
      function str:string;
      class operator Implicit(const AValue: Double): TComplex;
      class operator Implicit(const AValue: Integer): TComplex;
      class operator Implicit(const AValue: Int64): TComplex;
      class operator Add(const Left, Right: TComplex): TComplex;
      class operator Subtract(const Left, Right: TComplex): TComplex;
      class operator Multiply(const Left, Right: TComplex): TComplex;
      class operator Divide(const Left, Right: TComplex): TComplex;
      class operator Negative(const AValue: TComplex): TComplex;
      class operator Equal(const Left, Right: TComplex): Boolean;
      class operator NotEqual(const Left, Right: TComplex): Boolean;
   end;
It doesn't understand the first "function" after "public" says ":"
expected.

Any workarounds ?

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Andyk · 2012-06-12 20:11

The file also fails the tools/quick syntax check.

This looks like an IDE bug and the codetools syntax checker is not
compatible with fpc.

Can anyone verify this, I can't continue on with my project because it
won't let me set any component event properties. This is seriously
affecting me.

Is there any way to turn the syntax checker off?

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joseme · 2012-06-12 20:53

If I try to compile your unit, it fails but the error is not the same.
The first message lines are:

unit1.pas(13,16) Error: Forward declaration not solved "procedure
str:AnsiString;"
unit1.pas(14,22) Error: Forward declaration not solved "operator
:=(const Double):<record type>;"
unit1.pas(15,22) Error: Forward declaration not solved "operator
:=(const LongInt):<record type>;"
unit1.pas(16,22) Error: Forward declaration not solved "operator
:=(const Int64):<record type>;"
unit1.pas(17,22) Error: Forward declaration not solved "operator
+(const Tcomplex;const Tcomplex):<record type>;"
unit1.pas(18,22) Error: Forward declaration not solved "operator
-(const Tcomplex;const Tcomplex):<record type>;"
...
I am using Lazarus 1.1 Revision 37429, FPC 2.7.1

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Andyk · 2012-06-12 21:12

Yeah, I only included the header part of the file in the post, the FPC
compiler has no problem with it, its a complex math unit I developed
in Delphi, the program compiles and runs OK under lazarus.

The problem is I can't now add any more visual components on a form
because the IDE syntax checker throws up an error in the code as
detailed in the first post.

It looks like the IDE uses its own syntax checker/parser which it runs
before it will allow any event properties to be added to components
and it doesn't understand the advanced record structure.

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Andyk · 2012-06-13 10:23

I downloaded and, after much pain, managed to installed the 1.1
snapshot.

It seems this is fixed in Laz 1.1.

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joseme · 2012-06-13 11:14

Glad to know that. Because I am very lazy, I adopted CodeTyphon
several months ago.