[Lazarus] Regex and Syntax Highlighting

[Martin]

On 26/05/2010 13:24, Mattias Gärtner wrote:
> Zitat von Graeme Geldenhuys <graemeg.lists at gmail.com>:
>
>> 2010/5/26 Zaher Dirkey :
>>>
>>> I meant the mechanism of SynEdit not SynEdit it self, Let us call "Line
>>> Feeding Highlighting", LFH if you like :P
>
> LFH normally comes with a line state (some booleans or counters). Same 
> as synedit. But synedit supports arbitrary states (the default 
> implementation implements one stack). You need a stack for different 
> keyword sets. For example for the method modifiers. This is not fully 
> used in the synedit pascal highlighter, because IMO highlighting some 
> variables as keywords is not a big deal and because IFDEFs and macros 
> make it hard to implement fully.
> For example:
>
> procedure DoIt(
>   {$IFNDEF FPC} );
>   {$ELSE} i: integer = 0); inline; macro_modifier;
>   {$ENDIF}

IFDEF pose a bigger problem

if foo then begin
   bar();
   {$IFDEF a} end; {$endif}
   xyz();
   {$IFnDEF a} end; {$endif}

The ifdef maynot be possible to evaluate (within the highlighter, 
codetool could)

for xyz => 2 states are possible, and would need to be maintained.
with more ifdef, any number of states for a single line are possible.

So IFDEf should always balance egin/end correctly => otherwise there is 
currently no way to deal with them.

----
As for using special colors for "inactive" code => that isn't something 
the highlighte would do (because the highlighter is per file => it does 
have no way to know)

A special IDE specific SynEdit extension (that combines info from the 
highlighter and codetools) will one day deal with this



Martin