Yuya Nishihara <yuya@tcha.org> [Sun, 14 Feb 2016 19:48:33 +0900] rev 28689
revset: move tagging of alias arguments from tokenization to parsing phase
In short, this patch moves the hack from tokenizedefn() to _relabelaliasargs(),
which is called after parsing. This change aims to eliminate tight dependency
on the revset tokenizer.
Before this patch, we had to rewrite an alias argument to a pseudo function:
"$1" -> "_aliasarg('$1')"
('symbol', '$1') -> ('function', ('symbol', '_aliasarg'), ('string', '$1'))
This was because the tokenizer must generate tokens that are syntactically
valid. By moving the process to the parsing phase, we can assign a unique tag
to an alias argument.
('symbol', '$1') -> ('_aliasarg', '$1')
Since new _aliasarg node never be generated from a user input, we no longer
have to verify a user input at findaliases(). The test for _aliasarg("$1") is
removed as it is syntactically valid and should pass the parsing phase.
Yuya Nishihara <yuya@tcha.org> [Sun, 14 Feb 2016 21:46:50 +0900] rev 28688
revset: add test that should fail if '_aliasarg' tag is removed
I'm going to refactor the alias processing functions. We need '_aliasarg' tag
to limit the scope of the alias expansion, but it wasn't covered by the test.
This patch adds the test that should fail if '_aliasarg' were 'symbol'.
This is the first half of the second part of the "template alias" series. The
whole series will consist of the following parts:
1. make parsed template tree to be compatible with parser functions
(1d461ee26e1b and 73d01cba5810)
2. refactor alias processing to be less dependent on revset module
(1/2 in this series)
3. extract reusable component to parser module
4. clean up it
5. extend it to support template syntax
6. add debugging/testing functions of template aliases
7. add alias expansion routine to templater