Add support for PortugolLexer

[LorhanSohaky]

Portugol don't have a extensive documentation, so I based on Pascal lexer and the manual of Visualg that is a program that's implements the Portugol.

issue #2299

[jeanas]

This looks like lots of copy/paste from DelphiLexer, can you merge it into it by introducing a new boolean option to the lexer similar to turbopascal and freepascal?

[LorhanSohaky]

This looks like lots of copy/paste from DelphiLexer, can you merge it into it by introducing a new boolean option to the lexer similar to turbopascal and freepascal?

It's because Portugol doesn't understand Delphi's or Pascal's reserved words

[jeanas]

That should not be a problem. Just change DelphiLexer.__init__ so the lexer's keyword data is what you want if portugol=True is passed.

[LorhanSohaky]

Some differences:

• hex and char types are not supported
• there are no classes
• only single comments are supported
• the operators ; @ and ^ are not supported
• portugol has the operator <-
• asm is not supported
• label and goto are not supported
• function modifiers are not supported
• strings only with double quotes

Still do you think it's better to put portugol in DelphiLexer? A bit afraid is to appear several if portugol in the code or stylize tokens that shouldn't.

[jeanas]

Yes, this is a lot of code duplication and I'd really prefer not to.

if portugol is not a problem.

You can use if portugol if needed to prevent tokens from being styled if they don't have a meaning in Portugol. Keep in mind that it's a non-goal for Pygments to validate the input, so this will only be necessary if valid Portugol code would be highlighted wrongly.

[LorhanSohaky]

@jean-abou-samra , ok. How can I pass this parameter to the Lexer

[jeanas]

lexer = DelphiLexer(portugol=True)

[LorhanSohaky]

lexer = DelphiLexer(portugol=True)

It's because when running the tests I don't know how to pass this parameter.

python -m pygments -x -l pygments/lexers/pascal.py:DelphiLexer tests/examplefiles/delphi/example.alg

And every time the user uses it, will he have to pass this parameter? For example, in mkdocs material

```portugol(portugol=true)

// My code
```

https://squidfunk.github.io/mkdocs-material/reference/code-blocks/

[jeanas]

Well, that's true. OTOH, you can do

class PortugolLexer:
    name = 'Portugol'
    aliases = ['portugol']
    # etc. (mimetypes, filenames)
    def __new__(cls, *args, **kwargs):
        return DelphiLexer(*args, **kwargs, portugol=True)

and that will make the lexer available as a normal lexer class and enable the ```portugol syntax in mkdocs/whatever.

[LorhanSohaky]

Perfect! Do you recommend me putting it in the same file or creating a file just for Portugol Lexer as a Delphi inheritor?

[jeanas]

In the same file, as it's just a wrapper.

[LorhanSohaky]

@jean-abou-samra , thanks!

[jeanas]

Thanks for the update, looks much better now. I'll do some touch-ups.

[LorhanSohaky]

Thanks for the update, looks much better now. I'll do some touch-ups.

I thank you. Can you tell me when the next release will be? I'm very excited to use

[jeanas]

I don't think there is a date set in stone yet.

You can always install the latest version from source using

pip install https://github.com/pygments/pygments/archive/master.zip