In PGF oo module, calling a method strips grouping

[pgf-tikz-bot]

Migrated from SourceForge
Author: *anonymous
Timestamp: 2011-08-10 10:07:16

When calling a method on an object created using the PGF OO module, one level of grouping is stripped from the argument by the caller, causing problems if the argument contains a parenthesis. That is to say, calling `\obj.method({arg()})` *ought* to protect the inner `()` and pass `arg()` to the method. It doesn't, because of how `\pgfoo@caller` passes its arguments to the next call. To get round this, `pgfoo@caller` could protect the third argument when it passes it on to the next command:

\def\pgfoo@caller#1.#2(#3){%
\def\pgf@marshal{%
\pgfoothis@count=#1\relax%
\csname pgfooY\csname pgfooX\the\pgfoothis@count @Class\endcsname.#2\endcsname({#3})%
}%
\expandafter\pgf@marshal\expandafter\pgfoothis@count\the\pgfoothis@count\relax%
}

But I don't know if this would break anything else.

[pgf-tikz-bot]

Migrated from SourceForge
Author: *anonymous
Timestamp: 2011-08-10 10:14:47

A little testing shows that it's more complicated than I thought because of how `\pgfoo@caller` is used so my proposed solution is over-simplistic.

[pgf-tikz-bot]

Migrated from SourceForge
Author: tantau
Timestamp: 2013-07-19 13:17:56.586000

• status: open --> closed-fixed
• Group: --> v1.0 (example)

[pgf-tikz-bot]

Migrated from SourceForge
Author: tantau
Timestamp: 2013-07-19 13:17:57.346000

I fixed this in the CVS, even though it actually breaks some of the datavisualization code, which depended on the stripping behaviour. However, I also fixed that and, I agree, that the call should not strip the braces.