Supported multiple arguments with nested calls

[theofidry]

What's supported:

• <f(<g()>)>
• <f(<g()>, 'a')>
• <f(<g('a')>)>

What's not:

• <f(<g('b', 'e')>, 'd')>

/cc @dantleech

[theofidry]

Note that I don't think this should be a blocker for the 3.0.0 release. But I think it's easier to solve the problem by tackling #601.

[marinoska]

Hi @theofidry I see it comes from the same code as #775 645 as parsing arguments relies on this regexp:
preg_match_all('/[[^[]+]|[^,\s]+/', $argumentsString, $argumentsList);
And I have no idea how to extract arguments correctly from such pattern as
<f(<g(<b()>, e)>, d, <c()>)>
using only regexps.
I can fix it looping over the symbols in the argument string but you might have already had such a method implemented in the alice code, don't you?

[theofidry]

I partially tackled that one by tokenizing functions (that's what the FUNCTION_START__function__ was about: https://github.com/nelmio/alice/blob/master/tests/FixtureBuilder/ExpressionLanguage/Lexer/LexerIntegrationTest.php#L456).

That's clearly not enough and your fix may have helped. But as you said it's a problem were regexes are bad at. A cleaner solution would be #601 and #712. I believe @Hywan started some bits, but that's a significant piece of work for sure.

[theofidry]

I'll be closing this as IMO the real fix is #601.