Re: [EXTERN] Re: Re: Re: Re: Re: Definition of tokens in GP language

Hi,

is it your intension, that the lexer in lang.l does not contain binary operators such as '*' or '+' in,
for example, '12 + 34.5'?

Best wishes
Hong-Phuc

On 29/10/2025 14:57, Bill Allombert wrote:
> On Wed, Oct 29, 2025 at 02:27:16PM +0100, Hong-Phuc Bui wrote:
>> Hi,
>>
>> I took a look into the file lang.l. I think here is discrepancy of the lexical rules and what the gp prompt does:
>> The rule
>>
>> HEXINTEGER 0x[0-9A-Za-z]([0-9A-Za-z ]*[0-9A-Za-z])?
>>
>> does accpets 0x1 2 3 zzz. But gp prompt does not:
>>
>> ? 0x1 2 3 zzz
>>    ***   syntax error, unexpected variable name, expecting end of file: 0x123zzz
>>    ***
> 
> Indeed, this is parsed as
> 0x123 zzz
> which is a syntax error.
> 
>> I would change the rule to be
>>
>> HEXINTEGER 0x[0-9A-Fa-f]([0-9A-Fa-f ]*[0-9A-Fa-f])?
> 
> Thanks, I have update lang.l, same URL.
> 
> Cheers,
> Bill.

-- 
Hochschule für Technik und Wirtschaft des Saarlandes
University of Applied Sciences

Fakultät für Ingenieurwissenschaften
School of Engineering

Hong-Phuc Bui, M.Sc.
Informatik

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